The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2011:1465 advisory.

  - kernel: tpm: infoleak (CVE-2011-1162)

  - kernel: corrupted GUID partition tables can cause kernel oops (CVE-2011-1577)

  - kernel: taskstats io infoleak (CVE-2011-2494)

  - kernel: ipv6: make fragment identifications less predictable (CVE-2011-2699)

  - kernel: perf tools: may parse user-controlled configuration file (CVE-2011-2905)

  - kernel: net: improve sequence number generation (CVE-2011-3188)

  - kernel: cifs: signedness issue in CIFSFindNext() (CVE-2011-3191)

  - kernel: fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message (CVE-2011-3353)

  - kernel: b43: allocate receive buffers big enough for max frame len + offset (CVE-2011-3359)

  - kernel: cifs: always do is_path_accessible check in cifs_mount (CVE-2011-3363)

  - kernel: vlan: fix panic when handling priority tagged frames (CVE-2011-3593)

  - kernel: wrong headroom check in udp6_ufo_fragment() (CVE-2011-4326)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Aristide Fattori and Roberto Paleari reported a flaw in the Linux kernel's handling of IPv4 icmp packets. A remote user could exploit this to cause a denial of service. (CVE-2011-1927)

Goldwyn Rodrigues discovered that the OCFS2 filesystem did not correctly clear memory when writing certain file holes. A local attacker could exploit this to read uninitialized data from the disk, leading to a loss of privacy. (CVE-2011-0463)

Timo Warns discovered that the LDM disk partition handling code did not correctly handle certain values. By inserting a specially crafted disk device, a local attacker could exploit this to gain root privileges. (CVE-2011-1017)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1078)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check that device name strings were NULL terminated. A local attacker could exploit this to crash the system, leading to a denial of service, or leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1079)

Vasiliy Kulikov discovered that bridge network filtering did not check that name fields were NULL terminated. A local attacker could exploit this to leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1080)

Johan Hovold discovered that the DCCP network stack did not correctly handle certain packet combinations. A remote attacker could send specially crafted network traffic that would crash the system, leading to a denial of service. (CVE-2011-1093)

Peter Huewe discovered that the TPM device did not correctly initialize memory. A local attacker could exploit this to read kernel heap memory contents, leading to a loss of privacy. (CVE-2011-1160)

Vasiliy Kulikov discovered that the netfilter code did not check certain strings copied from userspace. A local attacker with netfilter access could exploit this to read kernel memory or crash the system, leading to a denial of service. (CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-2534)

Vasiliy Kulikov discovered that the Acorn Universal Networking driver did not correctly initialize memory. A remote attacker could send specially crafted traffic to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1173)

Dan Rosenberg discovered that the IRDA subsystem did not correctly check certain field sizes. If a system was using IRDA, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-1180)

Dan Rosenberg reported errors in the OSS (Open Sound System) MIDI interface. A local attacker on non-x86 systems might be able to cause a denial of service. (CVE-2011-1476)

Dan Rosenberg reported errors in the kernel's OSS (Open Sound System) driver for Yamaha FM synthesizer chips. A local user can exploit this to cause memory corruption, causing a denial of service or privilege escalation. (CVE-2011-1477)

It was discovered that the security fix for CVE-2010-4250 introduced a regression. A remote attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1479)

Dan Rosenberg discovered that MPT devices did not correctly validate certain values in ioctl calls. If these drivers were loaded, a local attacker could exploit this to read arbitrary kernel memory, leading to a loss of privacy. (CVE-2011-1494, CVE-2011-1495)

Tavis Ormandy discovered that the pidmap function did not correctly handle large requests. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1593)

Oliver Hartkopp and Dave Jones discovered that the CAN network driver did not correctly validate certain socket structures. If this driver was loaded, a local attacker could crash the system, leading to a denial of service. (CVE-2011-1598, CVE-2011-1748)

Vasiliy Kulikov discovered that the AGP driver did not check certain ioctl values. A local attacker with access to the video subsystem could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges. (CVE-2011-1745, CVE-2011-2022)

Vasiliy Kulikov discovered that the AGP driver did not check the size of certain memory allocations. A local attacker with access to the video subsystem could exploit this to run the system out of memory, leading to a denial of service. (CVE-2011-1746)

Dan Rosenberg reported an error in the old ABI compatibility layer of ARM kernels. A local attacker could exploit this flaw to cause a denial of service or gain root privileges. (CVE-2011-1759)

Dan Rosenberg discovered that the DCCP stack did not correctly handle certain packet structures. A remote attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1770)

Ben Greear discovered that CIFS did not correctly handle direct I/O. A local attacker with access to a CIFS partition could exploit this to crash the system, leading to a denial of service. (CVE-2011-1771)

Timo Warns discovered that the EFI GUID partition table was not correctly parsed. A physically local attacker that could insert mountable devices could exploit this to crash the system or possibly gain root privileges. (CVE-2011-1776)

It was discovered that an mmap() call with the MAP_PRIVATE flag on '/dev/zero' was incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2011-2479)

Robert Swiecki discovered that mapping extensions were incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2496)

The linux kernel did not properly account for PTE pages when deciding which task to kill in out of memory conditions. A local, unprivileged could exploit this flaw to cause a denial of service. (CVE-2011-2498)

A flaw was found in the b43 driver in the Linux kernel. An attacker could use this flaw to cause a denial of service if the system has an active wireless interface using the b43 driver. (CVE-2011-3359)

Yogesh Sharma discovered that CIFS did not correctly handle UNCs that had no prefixpaths. A local attacker with access to a CIFS partition could exploit this to crash the system, leading to a denial of service. (CVE-2011-3363)

Dan Rosenberg discovered flaws in the linux Rose (X.25 PLP) layer used by amateur radio. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root.
(CVE-2011-4913).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Dan Rosenberg discovered that IRDA did not correctly check the size of buffers. On non-x86 systems, a local attacker could exploit this to read kernel heap memory, leading to a loss of privacy. (CVE-2010-4529)

Dan Rosenburg discovered that the CAN subsystem leaked kernel addresses into the /proc filesystem. A local attacker could use this to increase the chances of a successful memory corruption exploit.
(CVE-2010-4565)

Kees Cook discovered that the IOWarrior USB device driver did not correctly check certain size fields. A local attacker with physical access could plug in a specially crafted USB device to crash the system or potentially gain root privileges. (CVE-2010-4656)

Goldwyn Rodrigues discovered that the OCFS2 filesystem did not correctly clear memory when writing certain file holes. A local attacker could exploit this to read uninitialized data from the disk, leading to a loss of privacy. (CVE-2011-0463)

Dan Carpenter discovered that the TTPCI DVB driver did not check certain values during an ioctl. If the dvb-ttpci module was loaded, a local attacker could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges. (CVE-2011-0521)

Jens Kuehnel discovered that the InfiniBand driver contained a race condition. On systems using InfiniBand, a local attacker could send specially crafted requests to crash the system, leading to a denial of service. (CVE-2011-0695)

Dan Rosenberg discovered that XFS did not correctly initialize memory.
A local attacker could make crafted ioctl calls to leak portions of kernel stack memory, leading to a loss of privacy. (CVE-2011-0711)

Rafael Dominguez Vega discovered that the caiaq Native Instruments USB driver did not correctly validate string lengths. A local attacker with physical access could plug in a specially crafted USB device to crash the system or potentially gain root privileges. (CVE-2011-0712)

Kees Cook reported that /proc/pid/stat did not correctly filter certain memory locations. A local attacker could determine the memory layout of processes in an attempt to increase the chances of a successful memory corruption exploit. (CVE-2011-0726)

Timo Warns discovered that MAC partition parsing routines did not correctly calculate block counts. A local attacker with physical access could plug in a specially crafted block device to crash the system or potentially gain root privileges. (CVE-2011-1010)

Timo Warns discovered that LDM partition parsing routines did not correctly calculate block counts. A local attacker with physical access could plug in a specially crafted block device to crash the system, leading to a denial of service. (CVE-2011-1012)

Matthiew Herrb discovered that the drm modeset interface did not correctly handle a signed comparison. A local attacker could exploit this to crash the system or possibly gain root privileges.
(CVE-2011-1013)

Marek Olsak discovered that the Radeon GPU drivers did not correctly validate certain registers. On systems with specific hardware, a local attacker could exploit this to write to arbitrary video memory.
(CVE-2011-1016)

Timo Warns discovered that the LDM disk partition handling code did not correctly handle certain values. By inserting a specially crafted disk device, a local attacker could exploit this to gain root privileges. (CVE-2011-1017)

Vasiliy Kulikov discovered that the CAP_SYS_MODULE capability was not needed to load kernel modules. A local attacker with the CAP_NET_ADMIN capability could load existing kernel modules, possibly increasing the attack surface available on the system. (CVE-2011-1019)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1078)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check that device name strings were NULL terminated. A local attacker could exploit this to crash the system, leading to a denial of service, or leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1079)

Vasiliy Kulikov discovered that bridge network filtering did not check that name fields were NULL terminated. A local attacker could exploit this to leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1080)

Nelson Elhage discovered that the epoll subsystem did not correctly handle certain structures. A local attacker could create malicious requests that would hang the system, leading to a denial of service.
(CVE-2011-1082)

Johan Hovold discovered that the DCCP network stack did not correctly handle certain packet combinations. A remote attacker could send specially crafted network traffic that would crash the system, leading to a denial of service. (CVE-2011-1093)

Peter Huewe discovered that the TPM device did not correctly initialize memory. A local attacker could exploit this to read kernel heap memory contents, leading to a loss of privacy. (CVE-2011-1160)

Dan Rosenberg discovered that some ALSA drivers did not correctly check the adapter index during ioctl calls. If this driver was loaded, a local attacker could make a specially crafted ioctl call to gain root privileges. (CVE-2011-1169)

Vasiliy Kulikov discovered that the netfilter code did not check certain strings copied from userspace. A local attacker with netfilter access could exploit this to read kernel memory or crash the system, leading to a denial of service. (CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-2534)

Vasiliy Kulikov discovered that the Acorn Universal Networking driver did not correctly initialize memory. A remote attacker could send specially crafted traffic to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1173)

Dan Rosenberg discovered that the IRDA subsystem did not correctly check certain field sizes. If a system was using IRDA, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-1180)

Julien Tinnes discovered that the kernel did not correctly validate the signal structure from tkill(). A local attacker could exploit this to send signals to arbitrary threads, possibly bypassing expected restrictions. (CVE-2011-1182)

Dan Rosenberg reported errors in the OSS (Open Sound System) MIDI interface. A local attacker on non-x86 systems might be able to cause a denial of service. (CVE-2011-1476)

Dan Rosenberg reported errors in the kernel's OSS (Open Sound System) driver for Yamaha FM synthesizer chips. A local user can exploit this to cause memory corruption, causing a denial of service or privilege escalation. (CVE-2011-1477)

Ryan Sweat discovered that the GRO code did not correctly validate memory. In some configurations on systems using VLANs, a remote attacker could send specially crafted traffic to crash the system, leading to a denial of service. (CVE-2011-1478)

Dan Rosenberg discovered that MPT devices did not correctly validate certain values in ioctl calls. If these drivers were loaded, a local attacker could exploit this to read arbitrary kernel memory, leading to a loss of privacy. (CVE-2011-1494, CVE-2011-1495)

Tavis Ormandy discovered that the pidmap function did not correctly handle large requests. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1593)

Vasiliy Kulikov discovered that the AGP driver did not check certain ioctl values. A local attacker with access to the video subsystem could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges. (CVE-2011-1745, CVE-2011-2022)

Oliver Hartkopp and Dave Jones discovered that the CAN network driver did not correctly validate certain socket structures. If this driver was loaded, a local attacker could crash the system, leading to a denial of service. (CVE-2011-1748)

A flaw was found in the b43 driver in the Linux kernel. An attacker could use this flaw to cause a denial of service if the system has an active wireless interface using the b43 driver. (CVE-2011-3359)

Maynard Johnson discovered that on POWER7, certain speculative events may raise a performance monitor exception. A local attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2011-4611)

Dan Rosenberg discovered flaws in the linux Rose (X.25 PLP) layer used by amateur radio. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root.
(CVE-2011-4913).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

  - IPv6 fragment identification value generation could     allow a remote attacker to disrupt a target system's     networking, preventing legitimate users from accessing     its services. (CVE-2011-2699, Important)

  - A signedness issue was found in the Linux kernel's CIFS     (Common Internet File System) implementation. A     malicious CIFS server could send a specially crafted     response to a directory read request that would result     in a denial of service or privilege escalation on a     system that has a CIFS share mounted. (CVE-2011-3191,     Important)

  - A flaw was found in the way the Linux kernel handled     fragmented IPv6 UDP datagrams over the bridge with UDP     Fragmentation Offload (UFO) functionality on. A remote     attacker could use this flaw to cause a denial of     service. (CVE-2011-4326, Important)

  - The way IPv4 and IPv6 protocol sequence numbers and     fragment IDs were generated could allow a     man-in-the-middle attacker to inject packets and     possibly hijack connections. Protocol sequence numbers     and fragment IDs are now more random. (CVE-2011-3188,     Moderate)

  - A buffer overflow flaw was found in the Linux kernel's     FUSE (Filesystem in Userspace) implementation. A local     user in the fuse group who has access to mount a FUSE     file system could use this flaw to cause a denial of     service. (CVE-2011-3353, Moderate)

  - A flaw was found in the b43 driver in the Linux kernel.
    If a system had an active wireless interface that uses     the b43 driver, an attacker able to send a specially     crafted frame to that interface could cause a denial of     service. (CVE-2011-3359, Moderate)

  - A flaw was found in the way CIFS shares with DFS     referrals at their root were handled. An attacker on the     local network who is able to deploy a malicious CIFS     server could create a CIFS network share that, when     mounted, would cause the client system to crash.
    (CVE-2011-3363, Moderate)

  - A flaw was found in the way the Linux kernel handled     VLAN 0 frames with the priority tag set. When using     certain network drivers, an attacker on the local     network could use this flaw to cause a denial of     service. (CVE-2011-3593, Moderate)

  - A flaw in the way memory containing security-related     data was handled in tpm_read() could allow a local,     unprivileged user to read the results of a previously     run TPM command. (CVE-2011-1162, Low)

  - A heap overflow flaw was found in the Linux kernel's EFI     GUID Partition Table (GPT) implementation. A local     attacker could use this flaw to cause a denial of     service by mounting a disk that contains specially     crafted partition tables. (CVE-2011-1577, Low)

  - The I/O statistics from the taskstats subsystem could be     read without any restrictions. A local, unprivileged     user could use this flaw to gather confidential     information, such as the length of a password used in a     process. (CVE-2011-2494, Low)

  - It was found that the perf tool, a part of the Linux     kernel's Performance Events implementation, could load     its configuration file from the current working     directory. If a local user with access to the perf tool     were tricked into running perf in a directory that     contains a specially crafted configuration file, it     could cause perf to overwrite arbitrary files and     directories accessible to that user. (CVE-2011-2905,     Low)

This update also fixes various bugs.

IPv6 fragment identification value generation could allow a remote attacker to disrupt a target system's networking, preventing legitimate users from accessing its services. (CVE-2011-2699 , Important)

A signedness issue was found in the Linux kernel's CIFS (Common Internet File System) implementation. A malicious CIFS server could send a specially crafted response to a directory read request that would result in a denial of service or privilege escalation on a system that has a CIFS share mounted. (CVE-2011-3191 , Important)

A flaw was found in the way the Linux kernel handled fragmented IPv6 UDP datagrams over the bridge with UDP Fragmentation Offload (UFO) functionality on. A remote attacker could use this flaw to cause a denial of service. (CVE-2011-4326 , Important)

The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were generated could allow a man-in-the-middle attacker to inject packets and possibly hijack connections. Protocol sequence numbers and fragment IDs are now more random. (CVE-2011-3188 , Moderate)

A buffer overflow flaw was found in the Linux kernel's FUSE (Filesystem in Userspace) implementation. A local user in the fuse group who has access to mount a FUSE file system could use this flaw to cause a denial of service. (CVE-2011-3353 , Moderate)

A flaw was found in the b43 driver in the Linux kernel. If a system had an active wireless interface that uses the b43 driver, an attacker able to send a specially crafted frame to that interface could cause a denial of service. (CVE-2011-3359 , Moderate)

A flaw was found in the way CIFS shares with DFS referrals at their root were handled. An attacker on the local network who is able to deploy a malicious CIFS server could create a CIFS network share that, when mounted, would cause the client system to crash. (CVE-2011-3363 , Moderate)

A flaw was found in the way the Linux kernel handled VLAN 0 frames with the priority tag set. When using certain network drivers, an attacker on the local network could use this flaw to cause a denial of service. (CVE-2011-3593 , Moderate)

A flaw in the way memory containing security-related data was handled in tpm_read() could allow a local, unprivileged user to read the results of a previously run TPM command. (CVE-2011-1162 , Low)

A heap overflow flaw was found in the Linux kernel's EFI GUID Partition Table (GPT) implementation. A local attacker could use this flaw to cause a denial of service by mounting a disk that contains specially crafted partition tables. (CVE-2011-1577 , Low)

The I/O statistics from the taskstats subsystem could be read without any restrictions. A local, unprivileged user could use this flaw to gather confidential information, such as the length of a password used in a process. (CVE-2011-2494 , Low)

It was found that the perf tool, a part of the Linux kernel's Performance Events implementation, could load its configuration file from the current working directory. If a local user with access to the perf tool were tricked into running perf in a directory that contains a specially crafted configuration file, it could cause perf to overwrite arbitrary files and directories accessible to that user.
(CVE-2011-2905 , Low)

Brad Spengler discovered that the kernel did not correctly account for userspace memory allocations during exec() calls. A local attacker could exploit this to consume all system memory, leading to a denial of service. (CVE-2010-4243)

Alexander Duyck discovered that the Intel Gigabit Ethernet driver did not correctly handle certain configurations. If such a device was configured without VLANs, a remote attacker could crash the system, leading to a denial of service. (CVE-2010-4263)

Nelson Elhage discovered that Econet did not correctly handle AUN packets over UDP. A local attacker could send specially crafted traffic to crash the system, leading to a denial of service.
(CVE-2010-4342)

Dan Rosenberg discovered that IRDA did not correctly check the size of buffers. On non-x86 systems, a local attacker could exploit this to read kernel heap memory, leading to a loss of privacy. (CVE-2010-4529)

Dan Rosenburg discovered that the CAN subsystem leaked kernel addresses into the /proc filesystem. A local attacker could use this to increase the chances of a successful memory corruption exploit.
(CVE-2010-4565)

Goldwyn Rodrigues discovered that the OCFS2 filesystem did not correctly clear memory when writing certain file holes. A local attacker could exploit this to read uninitialized data from the disk, leading to a loss of privacy. (CVE-2011-0463)

Jens Kuehnel discovered that the InfiniBand driver contained a race condition. On systems using InfiniBand, a local attacker could send specially crafted requests to crash the system, leading to a denial of service. (CVE-2011-0695)

Dan Rosenberg discovered that XFS did not correctly initialize memory.
A local attacker could make crafted ioctl calls to leak portions of kernel stack memory, leading to a loss of privacy. (CVE-2011-0711)

Kees Cook reported that /proc/pid/stat did not correctly filter certain memory locations. A local attacker could determine the memory layout of processes in an attempt to increase the chances of a successful memory corruption exploit. (CVE-2011-0726)

Matthiew Herrb discovered that the drm modeset interface did not correctly handle a signed comparison. A local attacker could exploit this to crash the system or possibly gain root privileges.
(CVE-2011-1013)

Marek Olsak discovered that the Radeon GPU drivers did not correctly validate certain registers. On systems with specific hardware, a local attacker could exploit this to write to arbitrary video memory.
(CVE-2011-1016)

Timo Warns discovered that the LDM disk partition handling code did not correctly handle certain values. By inserting a specially crafted disk device, a local attacker could exploit this to gain root privileges. (CVE-2011-1017)

Vasiliy Kulikov discovered that the CAP_SYS_MODULE capability was not needed to load kernel modules. A local attacker with the CAP_NET_ADMIN capability could load existing kernel modules, possibly increasing the attack surface available on the system. (CVE-2011-1019)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1078)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check that device name strings were NULL terminated. A local attacker could exploit this to crash the system, leading to a denial of service, or leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1079)

Vasiliy Kulikov discovered that bridge network filtering did not check that name fields were NULL terminated. A local attacker could exploit this to leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1080)

Neil Horman discovered that NFSv4 did not correctly handle certain orders of operation with ACL data. A remote attacker with access to an NFSv4 mount could exploit this to crash the system, leading to a denial of service. (CVE-2011-1090)

Peter Huewe discovered that the TPM device did not correctly initialize memory. A local attacker could exploit this to read kernel heap memory contents, leading to a loss of privacy. (CVE-2011-1160)

Timo Warns discovered that OSF partition parsing routines did not correctly clear memory. A local attacker with physical access could plug in a specially crafted block device to read kernel memory, leading to a loss of privacy. (CVE-2011-1163)

Vasiliy Kulikov discovered that the netfilter code did not check certain strings copied from userspace. A local attacker with netfilter access could exploit this to read kernel memory or crash the system, leading to a denial of service. (CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-2534)

Vasiliy Kulikov discovered that the Acorn Universal Networking driver did not correctly initialize memory. A remote attacker could send specially crafted traffic to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1173)

Dan Rosenberg discovered that the IRDA subsystem did not correctly check certain field sizes. If a system was using IRDA, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-1180)

Julien Tinnes discovered that the kernel did not correctly validate the signal structure from tkill(). A local attacker could exploit this to send signals to arbitrary threads, possibly bypassing expected restrictions. (CVE-2011-1182)

Dan Rosenberg reported errors in the OSS (Open Sound System) MIDI interface. A local attacker on non-x86 systems might be able to cause a denial of service. (CVE-2011-1476)

Dan Rosenberg reported errors in the kernel's OSS (Open Sound System) driver for Yamaha FM synthesizer chips. A local user can exploit this to cause memory corruption, causing a denial of service or privilege escalation. (CVE-2011-1477)

Ryan Sweat discovered that the GRO code did not correctly validate memory. In some configurations on systems using VLANs, a remote attacker could send specially crafted traffic to crash the system, leading to a denial of service. (CVE-2011-1478)

Dan Rosenberg discovered that MPT devices did not correctly validate certain values in ioctl calls. If these drivers were loaded, a local attacker could exploit this to read arbitrary kernel memory, leading to a loss of privacy. (CVE-2011-1494, CVE-2011-1495)

It was discovered that the Stream Control Transmission Protocol (SCTP) implementation incorrectly calculated lengths. If the net.sctp.addip_enable variable was turned on, a remote attacker could send specially crafted traffic to crash the system. (CVE-2011-1573)

Tavis Ormandy discovered that the pidmap function did not correctly handle large requests. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1593)

Oliver Hartkopp and Dave Jones discovered that the CAN network driver did not correctly validate certain socket structures. If this driver was loaded, a local attacker could crash the system, leading to a denial of service. (CVE-2011-1598, CVE-2011-1748)

Vasiliy Kulikov discovered that the AGP driver did not check certain ioctl values. A local attacker with access to the video subsystem could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges. (CVE-2011-1745, CVE-2011-2022)

Vasiliy Kulikov discovered that the AGP driver did not check the size of certain memory allocations. A local attacker with access to the video subsystem could exploit this to run the system out of memory, leading to a denial of service. (CVE-2011-1746)

Dan Rosenberg reported an error in the old ABI compatibility layer of ARM kernels. A local attacker could exploit this flaw to cause a denial of service or gain root privileges. (CVE-2011-1759)

Dan Rosenberg discovered that the DCCP stack did not correctly handle certain packet structures. A remote attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-1770)

Timo Warns discovered that the EFI GUID partition table was not correctly parsed. A physically local attacker that could insert mountable devices could exploit this to crash the system or possibly gain root privileges. (CVE-2011-1776)

A flaw was found in the b43 driver in the Linux kernel. An attacker could use this flaw to cause a denial of service if the system has an active wireless interface using the b43 driver. (CVE-2011-3359)

Yogesh Sharma discovered that CIFS did not correctly handle UNCs that had no prefixpaths. A local attacker with access to a CIFS partition could exploit this to crash the system, leading to a denial of service. (CVE-2011-3363)

Maynard Johnson discovered that on POWER7, certain speculative events may raise a performance monitor exception. A local attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2011-4611)

Dan Rosenberg discovered flaws in the linux Rose (X.25 PLP) layer used by amateur radio. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root.
(CVE-2011-4913).

Peter Huewe discovered an information leak in the handling of reading security-related TPM data. A local, unprivileged user could read the results of a previous TPM command. (CVE-2011-1162)

Clement Lecigne discovered a bug in the HFS filesystem. A local attacker could exploit this to cause a kernel oops. (CVE-2011-2203)

A flaw was found in the b43 driver in the Linux kernel. An attacker could use this flaw to cause a denial of service if the system has an active wireless interface using the b43 driver. (CVE-2011-3359)

A flaw was found in how the Linux kernel handles user-defined key types. An unprivileged local user could exploit this to crash the system. (CVE-2011-4110).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-1465 advisory.

    - [net] vlan: fix panic when handling priority tagged frames (Andy Gospodarek) [742849 714936]     {CVE-2011-3593}
    - [kernel] fix taskstats io infoleak (Jerome Marchand) [716847 716848] {CVE-2011-2494}
    - [tpm] Zero buffer after copying to userspace (Jiri Benc) [732632 732633] {CVE-2011-1162}
    - [fs] cifs: add fallback in is_path_accessible for old servers (Jeff Layton) [738301 692709]     {CVE-2011-3363}
    - [fs] cifs: always do is_path_accessible check in cifs_mount (Jeff Layton) [738301 692709]     {CVE-2011-3363}
    - [net] ipv6: make fragment identifications less predictable (Jiri Pirko) [723432 723433] {CVE-2011-2699}
    - [netdrv] b43: allocate receive buffers big enough for max frame len + offset (RuiRui Yang) [738204     738205] {CVE-2011-3359}
    - [fs] fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message (RuiRui Yang) [736764 736765] {CVE-2011-3353}
    - [fs] cifs: fix possible memory corruption in CIFSFindNext (Jeff Layton) [737482 730354] {CVE-2011-3191}
    - [kernel] perf tools: do not look at ./config for configuration (Jiri Benc) [730203 730204]     {CVE-2011-2905}
    - [fs] corrupted GUID partition tables can cause kernel oops (Jerome Marchand) [695981 695982]     {CVE-2011-1577}
    - [net] Compute protocol sequence numbers and fragment IDs using MD5. (Jiri Pirko) [732664 732665]     {CVE-2011-3188}
    - [crypto] Move md5_transform to lib/md5.c (Jiri Pirko) [732664 732665] {CVE-2011-3188}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-2033 advisory.

  - The tpm_read function in the Linux kernel 2.6 does not properly clear memory, which might allow local     users to read the results of the previous TPM command. (CVE-2011-1162)

  - Heap-based buffer overflow in the is_gpt_valid function in fs/partitions/efi.c in the Linux kernel 2.6.38     and earlier allows physically proximate attackers to cause a denial of service (OOPS) or possibly have     unspecified other impact via a crafted size of the EFI GUID partition-table header on removable media.
    (CVE-2011-1577)

  - kernel/taskstats.c in the Linux kernel before 3.1 allows local users to obtain sensitive I/O statistics by     sending taskstats commands to a netlink socket, as demonstrated by discovering the length of another     user's password. (CVE-2011-2494)

  - The IPv6 implementation in the Linux kernel before 3.1 does not generate Fragment Identification values     separately for each destination, which makes it easier for remote attackers to cause a denial of service     (disrupted networking) by predicting these values and sending crafted packets. (CVE-2011-2699)

  - The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to     generate sequence numbers and Fragment Identification values, which makes it easier for remote attackers     to cause a denial of service (disrupted networking) or hijack network sessions by predicting these values     and sending crafted packets. (CVE-2011-3188)

  - Integer signedness error in the CIFSFindNext function in fs/cifs/cifssmb.c in the Linux kernel before 3.1     allows remote CIFS servers to cause a denial of service (memory corruption) or possibly have unspecified     other impact via a large length value in a response to a read request for a directory. (CVE-2011-3191)

  - Buffer overflow in the fuse_notify_inval_entry function in fs/fuse/dev.c in the Linux kernel before 3.1     allows local users to cause a denial of service (BUG_ON and system crash) by leveraging the ability to     mount a FUSE filesystem. (CVE-2011-3353)

  - A certain Red Hat patch to the vlan_hwaccel_do_receive function in net/8021q/vlan_core.c in the Linux     kernel 2.6.32 on Red Hat Enterprise Linux (RHEL) 6 allows remote attackers to cause a denial of service     (system crash) via priority-tagged VLAN frames. (CVE-2011-3593)

  - The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when a certain UDP     Fragmentation Offload (UFO) configuration is enabled, allows remote attackers to cause a denial of service     (system crash) by sending fragmented IPv6 UDP packets to a bridge device. (CVE-2011-4326)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Brad Spengler discovered that the kernel did not correctly account for userspace memory allocations during exec() calls. A local attacker could exploit this to consume all system memory, leading to a denial of service. (CVE-2010-4243)

Alexander Duyck discovered that the Intel Gigabit Ethernet driver did not correctly handle certain configurations. If such a device was configured without VLANs, a remote attacker could crash the system, leading to a denial of service. (CVE-2010-4263)

Nelson Elhage discovered that Econet did not correctly handle AUN packets over UDP. A local attacker could send specially crafted traffic to crash the system, leading to a denial of service.
(CVE-2010-4342)

Dan Rosenberg discovered that IRDA did not correctly check the size of buffers. On non-x86 systems, a local attacker could exploit this to read kernel heap memory, leading to a loss of privacy. (CVE-2010-4529)

Dan Rosenburg discovered that the CAN subsystem leaked kernel addresses into the /proc filesystem. A local attacker could use this to increase the chances of a successful memory corruption exploit.
(CVE-2010-4565)

Kees Cook discovered that the IOWarrior USB device driver did not correctly check certain size fields. A local attacker with physical access could plug in a specially crafted USB device to crash the system or potentially gain root privileges. (CVE-2010-4656)

Goldwyn Rodrigues discovered that the OCFS2 filesystem did not correctly clear memory when writing certain file holes. A local attacker could exploit this to read uninitialized data from the disk, leading to a loss of privacy. (CVE-2011-0463)

Dan Carpenter discovered that the TTPCI DVB driver did not check certain values during an ioctl. If the dvb-ttpci module was loaded, a local attacker could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges. (CVE-2011-0521)

Jens Kuehnel discovered that the InfiniBand driver contained a race condition. On systems using InfiniBand, a local attacker could send specially crafted requests to crash the system, leading to a denial of service. (CVE-2011-0695)

Dan Rosenberg discovered that XFS did not correctly initialize memory.
A local attacker could make crafted ioctl calls to leak portions of kernel stack memory, leading to a loss of privacy. (CVE-2011-0711)

Rafael Dominguez Vega discovered that the caiaq Native Instruments USB driver did not correctly validate string lengths. A local attacker with physical access could plug in a specially crafted USB device to crash the system or potentially gain root privileges. (CVE-2011-0712)

Kees Cook reported that /proc/pid/stat did not correctly filter certain memory locations. A local attacker could determine the memory layout of processes in an attempt to increase the chances of a successful memory corruption exploit. (CVE-2011-0726)

Timo Warns discovered that MAC partition parsing routines did not correctly calculate block counts. A local attacker with physical access could plug in a specially crafted block device to crash the system or potentially gain root privileges. (CVE-2011-1010)

Timo Warns discovered that LDM partition parsing routines did not correctly calculate block counts. A local attacker with physical access could plug in a specially crafted block device to crash the system, leading to a denial of service. (CVE-2011-1012)

Matthiew Herrb discovered that the drm modeset interface did not correctly handle a signed comparison. A local attacker could exploit this to crash the system or possibly gain root privileges.
(CVE-2011-1013)

Marek Olsak discovered that the Radeon GPU drivers did not correctly validate certain registers. On systems with specific hardware, a local attacker could exploit this to write to arbitrary video memory.
(CVE-2011-1016)

Vasiliy Kulikov discovered that the CAP_SYS_MODULE capability was not needed to load kernel modules. A local attacker with the CAP_NET_ADMIN capability could load existing kernel modules, possibly increasing the attack surface available on the system. (CVE-2011-1019)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1078)

Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check that device name strings were NULL terminated. A local attacker could exploit this to crash the system, leading to a denial of service, or leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1079)

Vasiliy Kulikov discovered that bridge network filtering did not check that name fields were NULL terminated. A local attacker could exploit this to leak contents of kernel stack memory, leading to a loss of privacy. (CVE-2011-1080)

Nelson Elhage discovered that the epoll subsystem did not correctly handle certain structures. A local attacker could create malicious requests that would hang the system, leading to a denial of service.
(CVE-2011-1082)

Johan Hovold discovered that the DCCP network stack did not correctly handle certain packet combinations. A remote attacker could send specially crafted network traffic that would crash the system, leading to a denial of service. (CVE-2011-1093)

Peter Huewe discovered that the TPM device did not correctly initialize memory. A local attacker could exploit this to read kernel heap memory contents, leading to a loss of privacy. (CVE-2011-1160)

Vasiliy Kulikov discovered that the netfilter code did not check certain strings copied from userspace. A local attacker with netfilter access could exploit this to read kernel memory or crash the system, leading to a denial of service. (CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-2534)

Vasiliy Kulikov discovered that the Acorn Universal Networking driver did not correctly initialize memory. A remote attacker could send specially crafted traffic to read kernel stack memory, leading to a loss of privacy. (CVE-2011-1173)

Dan Rosenberg discovered that the IRDA subsystem did not correctly check certain field sizes. If a system was using IRDA, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-1180)

Julien Tinnes discovered that the kernel did not correctly validate the signal structure from tkill(). A local attacker could exploit this to send signals to arbitrary threads, possibly bypassing expected restrictions. (CVE-2011-1182)

Dan Rosenberg reported errors in the OSS (Open Sound System) MIDI interface. A local attacker on non-x86 systems might be able to cause a denial of service. (CVE-2011-1476)

Dan Rosenberg reported errors in the kernel's OSS (Open Sound System) driver for Yamaha FM synthesizer chips. A local user can exploit this to cause memory corruption, causing a denial of service or privilege escalation. (CVE-2011-1477)

Ryan Sweat discovered that the GRO code did not correctly validate memory. In some configurations on systems using VLANs, a remote attacker could send specially crafted traffic to crash the system, leading to a denial of service. (CVE-2011-1478)

It was discovered that the Stream Control Transmission Protocol (SCTP) implementation incorrectly calculated lengths. If the net.sctp.addip_enable variable was turned on, a remote attacker could send specially crafted traffic to crash the system. (CVE-2011-1573)

A flaw was found in the b43 driver in the Linux kernel. An attacker could use this flaw to cause a denial of service if the system has an active wireless interface using the b43 driver. (CVE-2011-3359)

Maynard Johnson discovered that on POWER7, certain speculative events may raise a performance monitor exception. A local attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2011-4611)

Dan Rosenberg discovered flaws in the linux Rose (X.25 PLP) layer used by amateur radio. A local user or a remote user on an X.25 network could exploit these flaws to execute arbitrary code as root.
(CVE-2011-4913).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated kernel-rt packages that fix several security issues and two bugs are now available for Red Hat Enterprise MRG 2.0.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* A malicious CIFS (Common Internet File System) server could send a specially crafted response to a directory read request that would result in a denial of service or privilege escalation on a system that has a CIFS share mounted. (CVE-2011-3191, Important)

* The way fragmented IPv6 UDP datagrams over the bridge with UDP Fragmentation Offload (UFO) functionality on were handled could allow a remote attacker to cause a denial of service. (CVE-2011-4326, Important)

* GRO (Generic Receive Offload) fields could be left in an inconsistent state. An attacker on the local network could use this flaw to cause a denial of service. GRO is enabled by default in all network drivers that support it. (CVE-2011-2723, Moderate)

* IPv4 and IPv6 protocol sequence number and fragment ID generation could allow a man-in-the-middle attacker to inject packets and possibly hijack connections. Protocol sequence numbers and fragment IDs are now more random. (CVE-2011-3188, Moderate)

* A flaw in the FUSE (Filesystem in Userspace) implementation could allow a local user in the fuse group who has access to mount a FUSE file system to cause a denial of service. (CVE-2011-3353, Moderate)

* A flaw in the b43 driver. If a system had an active wireless interface that uses the b43 driver, an attacker able to send a specially crafted frame to that interface could cause a denial of service. (CVE-2011-3359, Moderate)

* A flaw in the way CIFS shares with DFS referrals at their root were handled could allow an attacker on the local network, who is able to deploy a malicious CIFS server, to create a CIFS network share that, when mounted, would cause the client system to crash. (CVE-2011-3363, Moderate)

* A flaw in the m_stop() implementation could allow a local, unprivileged user to trigger a denial of service. (CVE-2011-3637, Moderate)

* Flaws in ghash_update() and ghash_final() could allow a local, unprivileged user to cause a denial of service. (CVE-2011-4081, Moderate)

* A flaw in the key management facility could allow a local, unprivileged user to cause a denial of service via the keyctl utility.
(CVE-2011-4110, Moderate)

* A flaw in the Journaling Block Device (JBD) could allow a local attacker to crash the system by mounting a specially crafted ext3 or ext4 disk. (CVE-2011-4132, Moderate)

* A flaw in the way memory containing security-related data was handled in tpm_read() could allow a local, unprivileged user to read the results of a previously run TPM command. (CVE-2011-1162, Low)

* I/O statistics from the taskstats subsystem could be read without any restrictions, which could allow a local, unprivileged user to gather confidential information, such as the length of a password used in a process. (CVE-2011-2494, Low)

* Flaws in tpacket_rcv() and packet_recvmsg() could allow a local, unprivileged user to leak information to user-space. (CVE-2011-2898, Low)

Red Hat would like to thank Darren Lavender for reporting CVE-2011-3191; Brent Meshier for reporting CVE-2011-2723; Dan Kaminsky for reporting CVE-2011-3188; Yogesh Sharma for reporting CVE-2011-3363; Nick Bowler for reporting CVE-2011-4081; Peter Huewe for reporting CVE-2011-1162; and Vasiliy Kulikov of Openwall for reporting CVE-2011-2494.

This update also fixes the following bugs :

* Previously, a mismatch in the build-id of the kernel-rt and the one in the related debuginfo package caused failures in SystemTap and perf. (BZ#768413)

* IBM x3650m3 systems were not able to boot the MRG Realtime kernel because they require a pmcraid driver that was not available. The pmcraid driver is included in this update. (BZ#753992)

Users should upgrade to these updated packages, which correct these issues. The system must be rebooted for this update to take effect.

Peter Huewe discovered an information leak in the handling of reading security-related TPM data. A local, unprivileged user could read the results of a previous TPM command. (CVE-2011-1162)

Clement Lecigne discovered a bug in the HFS filesystem. A local attacker could exploit this to cause a kernel oops. (CVE-2011-2203)

Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. (CVE-2011-3353)

A flaw was found in the b43 driver in the Linux kernel. An attacker could use this flaw to cause a denial of service if the system has an active wireless interface using the b43 driver. (CVE-2011-3359)

A flaw was found in how the Linux kernel handles user-defined key types. An unprivileged local user could exploit this to crash the system. (CVE-2011-4110)

ID	Name	Product	Family	Published	Updated	Severity
56927	RHEL 6 : kernel (RHSA-2011:1465)	Nessus	Red Hat Local Security Checks	11/23/2011	4/24/2024	critical
55591	Ubuntu 11.04 : linux vulnerabilities (USN-1167-1)	Nessus	Ubuntu Local Security Checks	7/14/2011	2/26/2020	medium
55454	Ubuntu 10.10 : linux vulnerabilities (USN-1160-1)	Nessus	Ubuntu Local Security Checks	6/29/2011	9/19/2019	high
61179	Scientific Linux Security Update : kernel on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	8/1/2012	1/14/2021	critical
69585	Amazon Linux AMI : kernel (ALAS-2011-26)	Nessus	Amazon Linux Local Security Checks	9/4/2013	8/3/2020	critical
55589	Ubuntu 10.10 : linux-mvl-dove vulnerabilities (USN-1159-1)	Nessus	Ubuntu Local Security Checks	7/14/2011	5/26/2016	high
57495	Ubuntu 8.04 LTS : linux vulnerabilities (USN-1323-1)	Nessus	Ubuntu Local Security Checks	1/12/2012	9/19/2019	medium
55521	Ubuntu 10.04 LTS : linux-mvl-dove vulnerabilities (USN-1162-1)	Nessus	Ubuntu Local Security Checks	7/6/2011	1/2/2019	high
68393	Oracle Linux 6 : kernel (ELSA-2011-1465)	Nessus	Oracle Linux Local Security Checks	7/12/2013	10/22/2024	critical
68424	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2011-2033)	Nessus	Oracle Linux Local Security Checks	7/12/2013	9/8/2021	critical
55104	Ubuntu 10.04 LTS : linux, linux-ec2 vulnerabilities (USN-1141-1)	Nessus	Ubuntu Local Security Checks	6/13/2011	9/19/2019	high
76635	RHEL 6 : MRG (RHSA-2012:0010)	Nessus	Red Hat Local Security Checks	7/22/2014	1/14/2021	critical
57497	USN-1325-1 : linux-ti-omap4 vulnerabilities	Nessus	Ubuntu Local Security Checks	1/12/2012	12/1/2016	medium

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