The Linux kernel before 2.6.31-rc7 does not initialize certain data structures within getname functions, which allows local users to read the contents of some kernel memory locations by calling getsockname on (1) an AF_APPLETALK socket, related to the atalk_getname function in net/appletalk/ddp.c; (2) an AF_IRDA socket, related to the irda_getname function in net/irda/af_irda.c; (3) an AF_ECONET socket, related to the econet_getname function in net/econet/af_econet.c; (4) an AF_NETROM socket, related to the nr_getname function in net/netrom/af_netrom.c; (5) an AF_ROSE socket, related to the rose_getname function in net/rose/af_rose.c; or (6) a raw CAN socket, related to the raw_getname function in net/can/raw.c.

From Red Hat Security Advisory 2009:1550 :

Updated kernel packages that fix several security issues and multiple bugs are now available for Red Hat Enterprise Linux 3.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

Security fixes :

* when fput() was called to close a socket, the __scm_destroy() function in the Linux kernel could make indirect recursive calls to itself. This could, potentially, lead to a denial of service issue.
(CVE-2008-5029, Important)

* the sendmsg() function in the Linux kernel did not block during UNIX socket garbage collection. This could, potentially, lead to a local denial of service. (CVE-2008-5300, Important)

* the exit_notify() function in the Linux kernel did not properly reset the exit signal if a process executed a set user ID (setuid) application before exiting. This could allow a local, unprivileged user to elevate their privileges. (CVE-2009-1337, Important)

* a flaw was found in the Intel PRO/1000 network driver in the Linux kernel. Frames with sizes near the MTU of an interface may be split across multiple hardware receive descriptors. Receipt of such a frame could leak through a validation check, leading to a corruption of the length check. A remote attacker could use this flaw to send a specially crafted packet that would cause a denial of service or code execution. (CVE-2009-1385, Important)

* the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags were not cleared when a setuid or setgid program was executed. A local, unprivileged user could use this flaw to bypass the mmap_min_addr protection mechanism and perform a NULL pointer dereference attack, or bypass the Address Space Layout Randomization (ASLR) security feature.
(CVE-2009-1895, Important)

* it was discovered that, when executing a new process, the clear_child_tid pointer in the Linux kernel is not cleared. If this pointer points to a writable portion of the memory of the new program, the kernel could corrupt four bytes of memory, possibly leading to a local denial of service or privilege escalation. (CVE-2009-2848, Important)

* missing initialization flaws were found in getname() implementations in the IrDA sockets, AppleTalk DDP protocol, NET/ROM protocol, and ROSE protocol implementations in the Linux kernel. Certain data structures in these getname() implementations were not initialized properly before being copied to user-space. These flaws could lead to an information leak. (CVE-2009-3002, Important)

* a NULL pointer dereference flaw was found in each of the following functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could be released by other processes before it is used to update the pipe's reader and writer counters. This could lead to a local denial of service or privilege escalation. (CVE-2009-3547, Important)

Bug fixes :

* this update adds the mmap_min_addr tunable and restriction checks to help prevent unprivileged users from creating new memory mappings below the minimum address. This can help prevent the exploitation of NULL pointer dereference bugs. Note that mmap_min_addr is set to zero (disabled) by default for backwards compatibility. (BZ#512642)

* a bridge reference count problem in IPv6 has been fixed. (BZ#457010)

* enforce null-termination of user-supplied arguments to setsockopt().
(BZ#505514)

* the gcc flag '-fno-delete-null-pointer-checks' was added to the kernel build options. This prevents gcc from optimizing out NULL pointer checks after the first use of a pointer. NULL pointer bugs are often exploited by attackers. Keeping these checks is a safety measure. (BZ#511185)

* a check has been added to the IPv4 code to make sure that rt is not NULL, to help prevent future bugs in functions that call ip_append_data() from being exploitable. (BZ#520300)

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

From Red Hat Security Advisory 2009:1548 :

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

Security fixes :

* a system with SELinux enforced was more permissive in allowing local users in the unconfined_t domain to map low memory areas even if the mmap_min_addr restriction was enabled. This could aid in the local exploitation of NULL pointer dereference bugs. (CVE-2009-2695, Important)

* a NULL pointer dereference flaw was found in the eCryptfs implementation in the Linux kernel. A local attacker could use this flaw to cause a local denial of service or escalate their privileges.
(CVE-2009-2908, Important)

* a flaw was found in the NFSv4 implementation. The kernel would do an unnecessary permission check after creating a file. This check would usually fail and leave the file with the permission bits set to random values. Note: This is a server-side only issue. (CVE-2009-3286, Important)

* a NULL pointer dereference flaw was found in each of the following functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could be released by other processes before it is used to update the pipe's reader and writer counters. This could lead to a local denial of service or privilege escalation. (CVE-2009-3547, Important)

* a flaw was found in the Realtek r8169 Ethernet driver in the Linux kernel. pci_unmap_single() presented a memory leak that could lead to IOMMU space exhaustion and a system crash. An attacker on the local network could abuse this flaw by using jumbo frames for large amounts of network traffic. (CVE-2009-3613, Important)

* missing initialization flaws were found in the Linux kernel. Padding data in several core network structures was not initialized properly before being sent to user-space. These flaws could lead to information leaks. (CVE-2009-3228, Moderate)

Bug fixes :

* with network bonding in the 'balance-tlb' or 'balance-alb' mode, the primary setting for the primary slave device was lost when said device was brought down. Bringing the slave back up did not restore the primary setting. (BZ#517971)

* some faulty serial device hardware caused systems running the kernel-xen kernel to take a very long time to boot. (BZ#524153)

* a caching bug in nfs_readdir() may have caused NFS clients to see duplicate files or not see all files in a directory. (BZ#526960)

* the RHSA-2009:1243 update removed the mpt_msi_enable option, preventing certain scripts from running. This update adds the option back. (BZ#526963)

* an iptables rule with the recent module and a hit count value greater than the ip_pkt_list_tot parameter (the default is 20), did not have any effect over packets, as the hit count could not be reached. (BZ#527434)

* a check has been added to the IPv4 code to make sure that rt is not NULL, to help prevent future bugs in functions that call ip_append_data() from being exploitable. (BZ#527436)

* a kernel panic occurred in certain conditions after reconfiguring a tape drive's block size. (BZ#528133)

* when using the Linux Virtual Server (LVS) in a master and backup configuration, and propagating active connections on the master to the backup, the connection timeout value on the backup was hard-coded to 180 seconds, meaning connection information on the backup was soon lost. This could prevent the successful failover of connections. The timeout value can now be set via 'ipvsadm --set'. (BZ#528645)

* a bug in nfs4_do_open_expired() could have caused the reclaimer thread on an NFSv4 client to enter an infinite loop. (BZ#529162)

* MSI interrupts may not have been delivered for r8169 based network cards that have MSI interrupts enabled. This bug only affected certain systems. (BZ#529366)

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

From Red Hat Security Advisory 2009:1541 :

Updated kernel packages that fix security issues are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

This update fixes the following security issues :

* a NULL pointer dereference flaw was found in each of the following functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could be released by other processes before it is used to update the pipe's reader and writer counters. This could lead to a local denial of service or privilege escalation. (CVE-2009-3547, Important)

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

Updated kernel packages that fix several security issues and multiple bugs are now available for Red Hat Enterprise Linux 3.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

Security fixes :

* when fput() was called to close a socket, the __scm_destroy() function in the Linux kernel could make indirect recursive calls to itself. This could, potentially, lead to a denial of service issue.
(CVE-2008-5029, Important)

* the sendmsg() function in the Linux kernel did not block during UNIX socket garbage collection. This could, potentially, lead to a local denial of service. (CVE-2008-5300, Important)

* the exit_notify() function in the Linux kernel did not properly reset the exit signal if a process executed a set user ID (setuid) application before exiting. This could allow a local, unprivileged user to elevate their privileges. (CVE-2009-1337, Important)

* a flaw was found in the Intel PRO/1000 network driver in the Linux kernel. Frames with sizes near the MTU of an interface may be split across multiple hardware receive descriptors. Receipt of such a frame could leak through a validation check, leading to a corruption of the length check. A remote attacker could use this flaw to send a specially crafted packet that would cause a denial of service or code execution. (CVE-2009-1385, Important)

* the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags were not cleared when a setuid or setgid program was executed. A local, unprivileged user could use this flaw to bypass the mmap_min_addr protection mechanism and perform a NULL pointer dereference attack, or bypass the Address Space Layout Randomization (ASLR) security feature.
(CVE-2009-1895, Important)

* it was discovered that, when executing a new process, the clear_child_tid pointer in the Linux kernel is not cleared. If this pointer points to a writable portion of the memory of the new program, the kernel could corrupt four bytes of memory, possibly leading to a local denial of service or privilege escalation. (CVE-2009-2848, Important)

* missing initialization flaws were found in getname() implementations in the IrDA sockets, AppleTalk DDP protocol, NET/ROM protocol, and ROSE protocol implementations in the Linux kernel. Certain data structures in these getname() implementations were not initialized properly before being copied to user-space. These flaws could lead to an information leak. (CVE-2009-3002, Important)

* a NULL pointer dereference flaw was found in each of the following functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could be released by other processes before it is used to update the pipe's reader and writer counters. This could lead to a local denial of service or privilege escalation. (CVE-2009-3547, Important)

Bug fixes :

* this update adds the mmap_min_addr tunable and restriction checks to help prevent unprivileged users from creating new memory mappings below the minimum address. This can help prevent the exploitation of NULL pointer dereference bugs. Note that mmap_min_addr is set to zero (disabled) by default for backwards compatibility. (BZ#512642)

* a bridge reference count problem in IPv6 has been fixed. (BZ#457010)

* enforce null-termination of user-supplied arguments to setsockopt().
(BZ#505514)

* the gcc flag '-fno-delete-null-pointer-checks' was added to the kernel build options. This prevents gcc from optimizing out NULL pointer checks after the first use of a pointer. NULL pointer bugs are often exploited by attackers. Keeping these checks is a safety measure. (BZ#511185)

* a check has been added to the IPv4 code to make sure that rt is not NULL, to help prevent future bugs in functions that call ip_append_data() from being exploitable. (BZ#520300)

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

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

Security fixes :

* a system with SELinux enforced was more permissive in allowing local users in the unconfined_t domain to map low memory areas even if the mmap_min_addr restriction was enabled. This could aid in the local exploitation of NULL pointer dereference bugs. (CVE-2009-2695, Important)

* a NULL pointer dereference flaw was found in the eCryptfs implementation in the Linux kernel. A local attacker could use this flaw to cause a local denial of service or escalate their privileges.
(CVE-2009-2908, Important)

* a flaw was found in the NFSv4 implementation. The kernel would do an unnecessary permission check after creating a file. This check would usually fail and leave the file with the permission bits set to random values. Note: This is a server-side only issue. (CVE-2009-3286, Important)

* a NULL pointer dereference flaw was found in each of the following functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could be released by other processes before it is used to update the pipe's reader and writer counters. This could lead to a local denial of service or privilege escalation. (CVE-2009-3547, Important)

* a flaw was found in the Realtek r8169 Ethernet driver in the Linux kernel. pci_unmap_single() presented a memory leak that could lead to IOMMU space exhaustion and a system crash. An attacker on the local network could abuse this flaw by using jumbo frames for large amounts of network traffic. (CVE-2009-3613, Important)

* missing initialization flaws were found in the Linux kernel. Padding data in several core network structures was not initialized properly before being sent to user-space. These flaws could lead to information leaks. (CVE-2009-3228, Moderate)

Bug fixes :

* with network bonding in the 'balance-tlb' or 'balance-alb' mode, the primary setting for the primary slave device was lost when said device was brought down. Bringing the slave back up did not restore the primary setting. (BZ#517971)

* some faulty serial device hardware caused systems running the kernel-xen kernel to take a very long time to boot. (BZ#524153)

* a caching bug in nfs_readdir() may have caused NFS clients to see duplicate files or not see all files in a directory. (BZ#526960)

* the RHSA-2009:1243 update removed the mpt_msi_enable option, preventing certain scripts from running. This update adds the option back. (BZ#526963)

* an iptables rule with the recent module and a hit count value greater than the ip_pkt_list_tot parameter (the default is 20), did not have any effect over packets, as the hit count could not be reached. (BZ#527434)

* a check has been added to the IPv4 code to make sure that rt is not NULL, to help prevent future bugs in functions that call ip_append_data() from being exploitable. (BZ#527436)

* a kernel panic occurred in certain conditions after reconfiguring a tape drive's block size. (BZ#528133)

* when using the Linux Virtual Server (LVS) in a master and backup configuration, and propagating active connections on the master to the backup, the connection timeout value on the backup was hard-coded to 180 seconds, meaning connection information on the backup was soon lost. This could prevent the successful failover of connections. The timeout value can now be set via 'ipvsadm --set'. (BZ#528645)

* a bug in nfs4_do_open_expired() could have caused the reclaimer thread on an NFSv4 client to enter an infinite loop. (BZ#529162)

* MSI interrupts may not have been delivered for r8169 based network cards that have MSI interrupts enabled. This bug only affected certain systems. (BZ#529366)

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

Updated kernel packages that fix security issues are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

This update fixes the following security issues :

* a NULL pointer dereference flaw was found in each of the following functions in the Linux kernel: pipe_read_open(), pipe_write_open(), and pipe_rdwr_open(). When the mutex lock is not held, the i_pipe pointer could be released by other processes before it is used to update the pipe's reader and writer counters. This could lead to a local denial of service or privilege escalation. (CVE-2009-3547, Important)

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

CVE-2008-5029 kernel: Unix sockets kernel panic

CVE-2008-5300 kernel: fix soft lockups/OOM issues with unix socket garbage collector

CVE-2009-1337 kernel: exit_notify: kill the wrong capable(CAP_KILL) check

CVE-2009-1385 kernel: e1000_clean_rx_irq() denial of service

CVE-2009-1895 kernel: personality: fix PER_CLEAR_ON_SETID

CVE-2009-2848 kernel: execve: must clear current->clear_child_tid

CVE-2009-3001, CVE-2009-3002 kernel: numerous getname() infoleaks 520300 - kernel: ipv4: make ip_append_data() handle NULL routing table [rhel-3]

CVE-2009-3547 kernel: fs: pipe.c NULL pointer dereference

Security fixes :

  - when fput() was called to close a socket, the
    __scm_destroy() function in the Linux kernel could make     indirect recursive calls to itself. This     could,potentially, lead to a denial of service issue.
    (CVE-2008-5029, Important)

  - the sendmsg() function in the Linux kernel did not block     during UNIX socket garbage collection. This could,     potentially, lead to a local denial of service.
    (CVE-2008-5300, Important)

  - the exit_notify() function in the Linux kernel did not     properly reset the exit signal if a process executed a     set user ID (setuid) application before exiting. This     could allow a local, unprivileged user to elevate their     privileges. (CVE-2009-1337, Important)

  - a flaw was found in the Intel PRO/1000 network driver in     the Linux kernel. Frames with sizes near the MTU of an     interface may be split across multiple hardware receive     descriptors. Receipt of such a frame could leak through     a validation check, leading to a corruption of the     length check. A remote attacker could use this flaw to     send a specially crafted packet that would cause a     denial of service or code execution. (CVE-2009-1385,     Important)

  - the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags were not     cleared when a setuid or setgid program was executed. A     local, unprivileged user could use this flaw to bypass     the mmap_min_addr protection mechanism and perform a     NULL pointer dereference attack, or bypass the Address     Space Layout Randomization (ASLR) security feature.
    (CVE-2009-1895, Important)

  - it was discovered that, when executing a new process,     the clear_child_tid pointer in the Linux kernel is not     cleared. If this pointer points to a writable portion of     the memory of the new program, the kernel could corrupt     four bytes of memory, possibly leading to a local denial     of service or privilege escalation. (CVE-2009-2848,     Important)

  - missing initialization flaws were found in getname()     implementations in the IrDA sockets, AppleTalk DDP     protocol, NET/ROM protocol, and ROSE protocol     implementations in the Linux kernel. Certain data     structures in these getname() implementations were not     initialized properly before being copied to user-space.
    These flaws could lead to an information leak.
    (CVE-2009-3002, Important)

  - a NULL pointer dereference flaw was found in each of the     following functions in the Linux kernel:
    pipe_read_open(), pipe_write_open(), and     pipe_rdwr_open(). When the mutex lock is not held, the     i_pipe pointer could be released by other processes     before it is used to update the pipe's reader and writer     counters. This could lead to a local denial of service     or privilege escalation. (CVE-2009-3547, Important)

Bug fixes :

  - this update adds the mmap_min_addr tunable and     restriction checks to help prevent unprivileged users     from creating new memory mappings below the minimum     address. This can help prevent the exploitation of NULL     pointer dereference bugs. Note that mmap_min_addr is set     to zero (disabled) by default for backwards     compatibility. (BZ#512642)

  - a bridge reference count problem in IPv6 has been fixed.
    (BZ#457010)

  - enforce null-termination of user-supplied arguments to     setsockopt(). (BZ#505514)

  - the gcc flag '-fno-delete-null-pointer-checks' was added     to the kernel build options. This prevents gcc from     optimizing out NULL pointer checks after the first use     of a pointer. NULL pointer bugs are often exploited by     attackers. Keeping these checks is a safety measure.
    (BZ#511185)

  - a check has been added to the IPv4 code to make sure     that rt is not NULL, to help prevent future bugs in     functions that call ip_append_data() from being     exploitable. (BZ#520300)

The system must be rebooted for this update to take effect.

This update fixes a several security issues and various bugs in the SUSE Linux Enterprise 10 SP 2 kernel.

The following security issues were fixed: CVE-2009-3547: A race condition during pipe open could be used by local attackers to elevate privileges.

  - On x86_64 systems a information leak of high register     contents (upper 32bit) was fixed. (CVE-2009-2910)

  - The randomness of the ASLR methods used in the kernel     was increased. (CVE-2009-3238)

  - A information leak from the kernel due to uninitialized     memory in AGP handling was fixed. (CVE-2009-1192)

  - A signed comparison in the ax25 sockopt handler was     fixed which could be used to crash the kernel or     potentially execute code. (CVE-2009-2909)

  - The execve function in the Linux kernel did not properly     clear the current->clear_child_tid pointer, which allows     local users to cause a denial of service (memory     corruption) or possibly gain privileges via a clone     system call with CLONE_CHILD_SETTID or     CLONE_CHILD_CLEARTID enabled, which is not properly     handled during thread creation and exit. (CVE-2009-2848)

  - Fixed various sockethandler getname leaks, which could     disclose memory previously used by the kernel or other     userland processes to the local attacker.
    (CVE-2009-3002)

  - Multiple buffer overflows in the cifs subsystem in the     Linux kernel allow remote CIFS servers to cause a denial     of service (memory corruption) and possibly have     unspecified other impact via (1) a malformed Unicode     string, related to Unicode string area alignment in     fs/cifs/sess.c; or (2) long Unicode characters, related     to fs/cifs/cifssmb.c and the cifs_readdir function in     fs/cifs/readdir.c. (CVE-2009-1633)

Also see the RPM changelog for more changes.

a. Service Console update for COS kernel

   The service console package kernel is updated to version 2.4.21-63.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2008-5029, CVE-2008-5300, CVE-2009-1337,    CVE-2009-1385, CVE-2009-1895, CVE-2009-2848, CVE-2009-3002, and    CVE-2009-3547 to the security issues fixed in kernel-2.4.21-63.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2009-2698, CVE-2009-2692 to the security    issues fixed in kernel-2.4.21-60.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, sensitive memory leak or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-1883     Solar Designer discovered a missing capability check in     the z90crypt driver or s390 systems. This vulnerability     may allow a local user to gain elevated privileges.

  - CVE-2009-2909     Arjan van de Ven discovered an issue in the AX.25     protocol implementation. A specially crafted call to     setsockopt() can result in a denial of service (kernel     oops).

  - CVE-2009-3001     Jiri Slaby fixed a sensitive memory leak issue in the     ANSI/IEEE 802.2 LLC implementation. This is not     exploitable in the Debian lenny kernel as root     privileges are required to exploit this issue.

  - CVE-2009-3002     Eric Dumazet fixed several sensitive memory leaks in the     IrDA, X.25 PLP (Rose), NET/ROM, Acorn Econet/AUN, and     Controller Area Network (CAN) implementations. Local     users can exploit these issues to gain access to kernel     memory.

  - CVE-2009-3228     Eric Dumazet reported an instance of uninitialized     kernel memory in the network packet scheduler. Local     users may be able to exploit this issue to read the     contents of sensitive kernel memory.

  - CVE-2009-3238     Linus Torvalds provided a change to the get_random_int()     function to increase its randomness.

  - CVE-2009-3286     Eric Paris discovered an issue with the NFSv4 server     implementation. When an O_EXCL create fails, files may     be left with corrupted permissions, possibly granting     unintentional privileges to other local users.

  - CVE-2009-3547     Earl Chew discovered a NULL pointer dereference issue in     the pipe_rdwr_open function which can be used by local     users to gain elevated privileges.

  - CVE-2009-3612     Jiri Pirko discovered a typo in the initialization of a     structure in the netlink subsystem that may allow local     users to gain access to sensitive kernel memory.

  - CVE-2009-3621     Tomoki Sekiyama discovered a deadlock condition in the     UNIX domain socket implementation. Local users can     exploit this vulnerability to cause a denial of service     (system hang).

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, sensitive memory leak or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-2846     Michael Buesch noticed a typing issue in the eisa-eeprom     driver for the hppa architecture. Local users could     exploit this issue to gain access to restricted memory.

  - CVE-2009-2847     Ulrich Drepper noticed an issue in the do_sigalstack     routine on 64-bit systems. This issue allows local users     to gain access to potentially sensitive memory on the     kernel stack.

  - CVE-2009-2848     Eric Dumazet discovered an issue in the execve path,     where the clear_child_tid variable was not being     properly cleared. Local users could exploit this issue     to cause a denial of service (memory corruption).

  - CVE-2009-2849     Neil Brown discovered an issue in the sysfs interface to     md devices. When md arrays are not active, local users     can exploit this vulnerability to cause a denial of     service (oops).

  - CVE-2009-2903     Mark Smith discovered a memory leak in the appletalk     implementation. When the appletalk and ipddp modules are     loaded, but no ipddp'N' device is found, remote     attackers can cause a denial of service by consuming     large amounts of system memory.

  - CVE-2009-2908     Loic Minier discovered an issue in the eCryptfs     filesystem. A local user can cause a denial of service     (kernel oops) by causing a dentry value to go negative.

  - CVE-2009-2909     Arjan van de Ven discovered an issue in the AX.25     protocol implementation. A specially crafted call to     setsockopt() can result in a denial of service (kernel     oops).

  - CVE-2009-2910     Jan Beulich discovered the existence of a sensitive     kernel memory leak. Systems running the 'amd64' kernel     do not properly sanitize registers for 32-bit processes.

  - CVE-2009-3001     Jiri Slaby fixed a sensitive memory leak issue in the     ANSI/IEEE 802.2 LLC implementation. This is not     exploitable in the Debian lenny kernel as root     privileges are required to exploit this issue.

  - CVE-2009-3002     Eric Dumazet fixed several sensitive memory leaks in the     IrDA, X.25 PLP (Rose), NET/ROM, Acorn Econet/AUN, and     Controller Area Network (CAN) implementations. Local     users can exploit these issues to gain access to kernel     memory.

  - CVE-2009-3228     Eric Dumazet reported an instance of uninitialized     kernel memory in the network packet scheduler. Local     users may be able to exploit this issue to read the     contents of sensitive kernel memory.

  - CVE-2009-3238     Linus Torvalds provided a change to the get_random_int()     function to increase its randomness.

  - CVE-2009-3286     Eric Paris discovered an issue with the NFSv4 server     implementation. When an O_EXCL create fails, files may     be left with corrupted permissions, possibly granting     unintentional privileges to other local users.

  - CVE-2009-3547     Earl Chew discovered a NULL pointer dereference issue in     the pipe_rdwr_open function which can be used by local     users to gain elevated privileges.

  - CVE-2009-3612     Jiri Pirko discovered a typo in the initialization of a     structure in the netlink subsystem that may allow local     users to gain access to sensitive kernel memory.

  - CVE-2009-3613     Alistair Strachan reported an issue in the r8169 driver.
    Remote users can cause a denial of service (IOMMU space     exhaustion and system crash) by transmitting a large     amount of jumbo frames.

  - CVE-2009-3620     Ben Hutchings discovered an issue in the DRM manager for     ATI Rage 128 graphics adapters. Local users may be able     to exploit this vulnerability to cause a denial of     service (NULL pointer dereference).

  - CVE-2009-3621     Tomoki Sekiyama discovered a deadlock condition in the     UNIX domain socket implementation. Local users can     exploit this vulnerability to cause a denial of service     (system hang).

Notice: Debian 5.0.4, the next point release of Debian 'lenny', will include a new default value for the mmap_min_addr tunable. This change will add an additional safeguard against a class of security vulnerabilities known as 'NULL pointer dereference' vulnerabilities, but it will need to be overridden when using certain applications.
Additional information about this change, including instructions for making this change locally in advance of 5.0.4 (recommended), can be found at: https://wiki.debian.org/mmap_min_addr.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, sensitive memory leak or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-2695     Eric Paris provided several fixes to increase the     protection provided by the mmap_min_addr tunable against     NULL pointer dereference vulnerabilities.

  - CVE-2009-2903     Mark Smith discovered a memory leak in the appletalk     implementation. When the appletalk and ipddp modules are     loaded, but no ipddp'N' device is found, remote     attackers can cause a denial of service by consuming     large amounts of system memory.

  - CVE-2009-2908     Loic Minier discovered an issue in the eCryptfs     filesystem. A local user can cause a denial of service     (kernel oops) by causing a dentry value to go negative.

  - CVE-2009-2909     Arjan van de Ven discovered an issue in the AX.25     protocol implementation. A specially crafted call to     setsockopt() can result in a denial of service (kernel     oops).

  - CVE-2009-2910     Jan Beulich discovered the existence of a sensitive     kernel memory leak. Systems running the 'amd64' kernel     do not properly sanitize registers for 32-bit processes.

  - CVE-2009-3001     Jiri Slaby fixed a sensitive memory leak issue in the     ANSI/IEEE 802.2 LLC implementation. This is not     exploitable in the Debian lenny kernel as root     privileges are required to exploit this issue.

  - CVE-2009-3002     Eric Dumazet fixed several sensitive memory leaks in the     IrDA, X.25 PLP (Rose), NET/ROM, Acorn Econet/AUN, and     Controller Area Network (CAN) implementations. Local     users can exploit these issues to gain access to kernel     memory.

  - CVE-2009-3286     Eric Paris discovered an issue with the NFSv4 server     implementation. When an O_EXCL create fails, files may     be left with corrupted permissions, possibly granting     unintentional privileges to other local users.

  - CVE-2009-3290     Jan Kiszka noticed that the kvm_emulate_hypercall     function in KVM does not prevent access to MMU     hypercalls from ring 0, which allows local guest OS     users to cause a denial of service (guest kernel crash)     and read or write guest kernel memory.

  - CVE-2009-3613     Alistair Strachan reported an issue in the r8169 driver.
    Remote users can cause a denial of service (IOMMU space     exhaustion and system crash) by transmitting a large     amount of jumbo frames.

This kernel update for openSUSE 11.0 fixes some bugs and several security problems.

The following security issues are fixed: CVE-2009-4536:
drivers/net/e1000/e1000_main.c in the e1000 driver in the Linux kernel handles Ethernet frames that exceed the MTU by processing certain trailing payload data as if it were a complete frame, which allows remote attackers to bypass packet filters via a large packet with a crafted payload.

CVE-2009-4538: drivers/net/e1000e/netdev.c in the e1000e driver in the Linux kernel does not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to have an unspecified impact via crafted packets.

CVE-2010-0007: Missing CAP_NET_ADMIN checks in the ebtables netfilter code might have allowed local attackers to modify bridge firewall settings.

CVE-2010-0003: An information leakage on fatal signals on x86_64 machines was fixed.

CVE-2009-4138: drivers/firewire/ohci.c in the Linux kernel, when packet-per-buffer mode is used, allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unknown other impact via an unspecified ioctl associated with receiving an ISO packet that contains zero in the payload-length field.

CVE-2009-4308: The ext4_decode_error function in fs/ext4/super.c in the ext4 filesystem in the Linux kernel before 2.6.32 allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference), and possibly have unspecified other impact, via a crafted read-only filesystem that lacks a journal.

CVE-2009-3939: The poll_mode_io file for the megaraid_sas driver in the Linux kernel 2.6.31.6 and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.

CVE-2009-4021: The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.

CVE-2009-3547: A race condition in the pipe(2) systemcall could be used by local attackers to hang the machine. The kernel in Moblin 2.0 uses NULL ptr protection which avoids code execution possbilities.

CVE-2009-2903: Memory leak in the appletalk subsystem in the Linux kernel 2.4.x through 2.4.37.6 and 2.6.x through 2.6.31, when the appletalk and ipddp modules are loaded but the ipddp'N' device is not found, allows remote attackers to cause a denial of service (memory consumption) via IP-DDP datagrams.

CVE-2009-3621: net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AF_UNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.

CVE-2009-3612: The tcf_fill_node function in net/sched/cls_api.c in the netlink subsystem in the Linux kernel 2.6.x before 2.6.32-rc5, and 2.4.37.6 and earlier, does not initialize a certain tcm__pad2 structure member, which might allow local users to obtain sensitive information from kernel memory via unspecified vectors.

CVE-2009-3620: The ATI Rage 128 (aka r128) driver in the Linux kernel before 2.6.31-git11 does not properly verify Concurrent Command Engine (CCE) state initialization, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly gain privileges via unspecified ioctl calls.

CVE-2009-3726: The nfs4_proc_lock function in fs/nfs/nfs4proc.c in the NFSv4 client in the Linux kernel before 2.6.31-rc4 allows remote NFS servers to cause a denial of service (NULL pointer dereference and panic) by sending a certain response containing incorrect file attributes, which trigger attempted use of an open file that lacks NFSv4 state.

CVE-2009-3286: NFSv4 in the Linux kernel 2.6.18, and possibly other versions, does not properly clean up an inode when an O_EXCL create fails, which causes files to be created with insecure settings such as setuid bits, and possibly allows local users to gain privileges, related to the execution of the do_open_permission function even when a create fails.

CVE-2009-2910: arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.31.4 on the x86_64 platform does not clear certain kernel registers before a return to user mode, which allows local users to read register values from an earlier process by switching an ia32 process to 64-bit mode.

CVE-2009-3238: The get_random_int function in drivers/char/random.c in the Linux kernel before 2.6.30 produces insufficiently random numbers, which allows attackers to predict the return value, and possibly defeat protection mechanisms based on randomization, via vectors that leverage the function's tendency to 'return the same value over and over again for long stretches of time.'

CVE-2009-2848: The execve function in the Linux kernel, possibly 2.6.30-rc6 and earlier, does not properly clear the current->clear_child_tid pointer, which allows local users to cause a denial of service (memory corruption) or possibly gain privileges via a clone system call with CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID enabled, which is not properly handled during thread creation and exit.

CVE-2009-3002: The Linux kernel before 2.6.31-rc7 does not initialize certain data structures within getname functions, which allows local users to read the contents of some kernel memory locations by calling getsockname on (1) an AF_APPLETALK socket, related to the atalk_getname function in net/appletalk/ddp.c; (2) an AF_IRDA socket, related to the irda_getname function in net/irda/af_irda.c; (3) an AF_ECONET socket, related to the econet_getname function in net/econet/af_econet.c; (4) an AF_NETROM socket, related to the nr_getname function in net/netrom/af_netrom.c; (5) an AF_ROSE socket, related to the rose_getname function in net/rose/af_rose.c; or (6) a raw CAN socket, related to the raw_getname function in net/can/raw.c.

CVE-2009-1633: Multiple buffer overflows in the cifs subsystem in the Linux kernel before 2.6.29.4 allow remote CIFS servers to cause a denial of service (memory corruption) and possibly have unspecified other impact via (1) a malformed Unicode string, related to Unicode string area alignment in fs/cifs/sess.c; or (2) long Unicode characters, related to fs/cifs/cifssmb.c and the cifs_readdir function in fs/cifs/readdir.c.

This update fixes various security issues and some bugs in the SUSE Linux Enterprise 9 kernel.

The following security bugs were fixed :

  - A race condition in the pipe(2) systemcall could be used     by local attackers to execute code. (CVE-2009-3547)

  - On x86_64 systems a information leak of high register     contents (upper 32bit) was fixed. (CVE-2009-2910)

  - The (1) agp_generic_alloc_page and (2)     agp_generic_alloc_pages functions in     drivers/char/agp/generic.c in the agp subsystem in the     Linux kernel do not zero out pages that may later be     available to a user-space process, which allows local     users to obtain sensitive information by reading these     pages. (CVE-2009-1192)

  - Unsigned check in the ax25 socket handler could allow     local attackers to potentially crash the kernel or even     execute code. (CVE-2009-2909)

  - The execve function in the Linux kernel did not properly     clear the current->clear_child_tid pointer, which allows     local users to cause a denial of service (memory     corruption) or possibly gain privileges via a clone     system call with CLONE_CHILD_SETTID or     CLONE_CHILD_CLEARTID enabled, which is not properly     handled during thread creation and exit. (CVE-2009-2848)

  - Fixed various sockethandler getname leaks, which could     disclose memory previously used by the kernel or other     userland processes to the local attacker.
    (CVE-2009-3002)

  - Multiple buffer overflows in the cifs subsystem in the     Linux kernel allow remote CIFS servers to cause a denial     of service (memory corruption) and possibly have     unspecified other impact via (1) a malformed Unicode     string, related to Unicode string area alignment in     fs/cifs/sess.c; or (2) long Unicode characters, related     to fs/cifs/cifssmb.c and the cifs_readdir function in     fs/cifs/readdir.c. (CVE-2009-1633)

  - The nfs4_proc_lock function in fs/nfs/nfs4proc.c in the     NFSv4 client in the allows remote NFS servers to cause a     denial of service (NULL pointer dereference and panic)     by sending a certain response containing incorrect file     attributes, which trigger attempted use of an open file     that lacks NFSv4 state. (CVE-2009-3726)

The SUSE Linux Enterprise 11 Kernel was updated to 2.6.27.37 fixing various bugs and security issues.

The following security issues were fixed :

  - Unsigned check in the ax25 socket handler could allow     local attackers to potentially crash the kernel or even     execute code. (CVE-2009-2909)

  - Fixed various sockethandler getname leaks, which could     disclose memory previously used by the kernel or other     userland processes to the local attacker.
    (CVE-2009-3002)

  - A information leakage with upper 32bit register values     on x86_64 systems was fixed. (CVE-2009-2910)

Various KVM stability and security fixes have also been added.

The openSUSE 11.1 Kernel was updated to 2.6.27.37 fixing various bugs and security issues.

Following security issues were fixed: CVE-2009-2909: Unsigned check in the ax25 socket handler could allow local attackers to potentially crash the kernel or even execute code.

CVE-2009-3002: Fixed various sockethandler getname leaks, which could disclose memory previously used by the kernel or other userland processes to the local attacker.

CVE-2009-2910: A information leakage with upper 32bit register values on x86_64 systems was fixed.

Various KVM stability and security fixes have also been added.

Solar Designer discovered that the z90crypt driver did not correctly check capabilities. A local attacker could exploit this to shut down the device, leading to a denial of service. Only affected Ubuntu 6.06.
(CVE-2009-1883)

Michael Buesch discovered that the SGI GRU driver did not correctly check the length when setting options. A local attacker could exploit this to write to the kernel stack, leading to root privilege escalation or a denial of service. Only affected Ubuntu 8.10 and 9.04.
(CVE-2009-2584)

It was discovered that SELinux did not fully implement the mmap_min_addr restrictions. A local attacker could exploit this to allocate the NULL memory page which could lead to further attacks against kernel NULL-dereference vulnerabilities. Ubuntu 6.06 was not affected. (CVE-2009-2695)

Cagri Coltekin discovered that the UDP stack did not correctly handle certain flags. A local user could send specially crafted commands and traffic to gain root privileges or crash the systeam, leading to a denial of service. Only affected Ubuntu 6.06. (CVE-2009-2698)

Hiroshi Shimamoto discovered that monotonic timers did not correctly validate parameters. A local user could make a specially crafted timer request to gain root privileges or crash the system, leading to a denial of service. Only affected Ubuntu 9.04. (CVE-2009-2767)

Michael Buesch discovered that the HPPA ISA EEPROM driver did not correctly validate positions. A local user could make a specially crafted request to gain root privileges or crash the system, leading to a denial of service. (CVE-2009-2846)

Ulrich Drepper discovered that kernel signal stacks were not being correctly padded on 64-bit systems. A local attacker could send specially crafted calls to expose 4 bytes of kernel stack memory, leading to a loss of privacy. (CVE-2009-2847)

Jens Rosenboom discovered that the clone method did not correctly clear certain fields. A local attacker could exploit this to gain privileges or crash the system, leading to a denial of service.
(CVE-2009-2848)

It was discovered that the MD driver did not check certain sysfs files. A local attacker with write access to /sys could exploit this to cause a system crash, leading to a denial of service. Ubuntu 6.06 was not affected. (CVE-2009-2849)

Mark Smith discovered that the AppleTalk stack did not correctly manage memory. A remote attacker could send specially crafted traffic to cause the system to consume all available memory, leading to a denial of service. (CVE-2009-2903)

Loic Minier discovered that eCryptfs did not correctly handle writing to certain deleted files. A local attacker could exploit this to gain root privileges or crash the system, leading to a denial of service.
Ubuntu 6.06 was not affected. (CVE-2009-2908)

It was discovered that the LLC, AppleTalk, IR, EConet, Netrom, and ROSE network stacks did not correctly initialize their data structures. A local attacker could make specially crafted calls to read kernel memory, leading to a loss of privacy. (CVE-2009-3001, CVE-2009-3002)

It was discovered that the randomization used for Address Space Layout Randomization was predictable within a small window of time. A local attacker could exploit this to leverage further attacks that require knowledge of userspace memory layouts. (CVE-2009-3238)

Eric Paris discovered that NFSv4 did not correctly handle file creation failures. An attacker with write access to an NFSv4 share could exploit this to create files with arbitrary mode bits, leading to privilege escalation or a loss of privacy. (CVE-2009-3286)

Bob Tracy discovered that the SCSI generic driver did not correctly use the right index for array access. A local attacker with write access to a CDR could exploit this to crash the system, leading to a denial of service. Only Ubuntu 9.04 was affected. (CVE-2009-3288)

Jan Kiszka discovered that KVM did not correctly validate certain hypercalls. A local unprivileged attacker in a virtual guest could exploit this to crash the guest kernel, leading to a denial of service. Ubuntu 6.06 was not affected. (CVE-2009-3290).

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.

Update to kernel 2.6.27.35:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.31 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.32 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.33 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.34 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.35

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

ID	Name	Product	Family	Severity
67955	Oracle Linux 3 : kernel (ELSA-2009-1550)	Nessus	Oracle Linux Local Security Checks	high
67953	Oracle Linux 5 : kernel (ELSA-2009-1548)	Nessus	Oracle Linux Local Security Checks	high
67952	Oracle Linux 4 : kernel (ELSA-2009-1541)	Nessus	Oracle Linux Local Security Checks	high
67070	CentOS 3 : kernel (CESA-2009:1550)	Nessus	CentOS Local Security Checks	high
67068	CentOS 5 : kernel (CESA-2009:1548)	Nessus	CentOS Local Security Checks	high
67067	CentOS 4 : kernel (CESA-2009:1541)	Nessus	CentOS Local Security Checks	high
60688	Scientific Linux Security Update : kernel on SL3.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	high
59140	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 6636)	Nessus	SuSE Local Security Checks	high
47150	VMSA-2010-0010 : ESX 3.5 third-party update for Service Console kernel	Nessus	VMware ESX Local Security Checks	high
44794	Debian DSA-1929-1 : linux-2.6 - privilege escalation/denial of service/sensitive memory leak	Nessus	Debian Local Security Checks	high
44793	Debian DSA-1928-1 : linux-2.6.24 - privilege escalation/denial of service/sensitive memory leak	Nessus	Debian Local Security Checks	high
44780	Debian DSA-1915-1 : linux-2.6 - privilege escalation/denial of service/sensitive memory leak	Nessus	Debian Local Security Checks	high
44621	openSUSE Security Update : kernel (kernel-1908)	Nessus	SuSE Local Security Checks	critical
42812	SuSE9 Security Update : Linux kernel (YOU Patch Number 12541)	Nessus	SuSE Local Security Checks	high
42465	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 6632)	Nessus	SuSE Local Security Checks	high
42360	RHEL 3 : kernel (RHSA-2009:1550)	Nessus	Red Hat Local Security Checks	high
42358	RHEL 5 : kernel (RHSA-2009:1548)	Nessus	Red Hat Local Security Checks	high
42343	SuSE 11 Security Update : Linux kernel (SAT Patch Numbers 1410 / 1412 / 1413)	Nessus	SuSE Local Security Checks	medium
42334	openSUSE Security Update : kernel (kernel-1415)	Nessus	SuSE Local Security Checks	medium
42209	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 : linux, linux-source-2.6.15 vulnerabilities (USN-852-1)	Nessus	Ubuntu Local Security Checks	high
41973	Fedora 10 : kernel-2.6.27.35-170.2.94.fc10 (2009-10165)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2009-3002

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high

high

critical

high

high

high

high

medium

medium

high

high