Stack-based buffer overflow in the random number generator (RNG) implementation in the Linux kernel before 2.6.22 might allow local root users to cause a denial of service or gain privileges by setting the default wakeup threshold to a value greater than the output pool size, which triggers writing random numbers to the stack by the pool transfer function involving "bound check ordering". NOTE: this issue might only cross privilege boundaries in environments that have granular assignment of privileges for root.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2007-0940 advisory.

    [2.6.18-8.1.15.0.1.el5]
     - Fix bonding primary=ethX (Bert Barbe) [IT 101532] [ORA 5136660]
     - Add entropy module option to e1000/bnx2 (John Sobecki) [ORA 6045759]

     [2.6.18-8.1.15.el5]
     - [dlm] A TCP connection to DLM port blocks DLM operations (Patrick      Caulfield ) [245922] {CVE-2007-3380}
     - [ppc] 4k page mapping support for userspace in 64k kernels (Scott      Moser ) [275841] {CVE-2007-3850}
     - [ptrace] NULL pointer dereference triggered by ptrace (Anton Arapov )      [275981] {CVE-2007-3731}
     - [fs] hugetlb: fix prio_tree unit (Konrad Rzeszutek ) [253929]      {CVE-2007-4133}
     - [x86_64] Don't leak NT bit into next task (Dave Anderson ) [298151]      {CVE-2007-4574}
     - [fs] Reset current->pdeath_signal on SUID binary execution (Peter      Zijlstra ) [252307] {CVE-2007-3848}
     - [misc] Bounds check ordering issue in random driver (Anton Arapov )      [275961] {CVE-2007-3105}
     - [usb] usblcd: Locally triggerable memory consumption (Anton Arapov )      [276001] {CVE-2007-3513}
     - [net] igmp: check for NULL when allocating GFP_ATOMIC skbs (Neil      Horman ) [303281]
     - [scsi] aacraid: Missing ioctl() permission checks (Vitaly Mayatskikh )      [298371] {CVE-2007-4308}
     - [xen] Guest access to MSR may cause system crash/data corruption      (Bhavana Nagendra ) [253312] {CVE-2007-3733}

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.

From Red Hat Security Advisory 2007:0939 :

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

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

The Linux kernel is the core of the operating system.

These updated kernel packages contain fixes for the following security issues :

* A flaw was found in the handling of process death signals. This allowed a local user to send arbitrary signals to the suid-process executed by that user. A successful exploitation of this flaw depends on the structure of the suid-program and its signal handling.
(CVE-2007-3848, Important)

* A flaw was found in the CIFS file system. This could cause the umask values of a process to not be honored on CIFS file systems where UNIX extensions are supported. (CVE-2007-3740, Important)

* A flaw was found in the VFAT compat ioctl handling on 64-bit systems. This allowed a local user to corrupt a kernel_dirent struct and cause a denial of service. (CVE-2007-2878, Important)

* A flaw was found in the Advanced Linux Sound Architecture (ALSA). A local user who had the ability to read the /proc/driver/snd-page-alloc file could see portions of kernel memory. (CVE-2007-4571, Moderate)

* A flaw was found in the aacraid SCSI driver. This allowed a local user to make ioctl calls to the driver that should be restricted to privileged users. (CVE-2007-4308, Moderate)

* A flaw was found in the stack expansion when using the hugetlb kernel on PowerPC systems. This allowed a local user to cause a denial of service. (CVE-2007-3739, Moderate)

* A flaw was found in the handling of zombie processes. A local user could create processes that would not be properly reaped which could lead to a denial of service. (CVE-2006-6921, Moderate)

* A flaw was found in the CIFS file system handling. The mount option 'sec=' did not enable integrity checking or produce an error message if used. (CVE-2007-3843, Low)

* A flaw was found in the random number generator implementation that allowed a local user to cause a denial of service or possibly gain privileges. This flaw could be exploited if the root user raised the default wakeup threshold over the size of the output pool.
(CVE-2007-3105, Low)

Additionally, the following bugs were fixed :

* A flaw was found in the kernel netpoll code, creating a potential deadlock condition. If the xmit_lock for a given network interface is held, and a subsequent netpoll event is generated from within the lock owning context (a console message for example), deadlock on that cpu will result, because the netpoll code will attempt to re-acquire the xmit_lock. The fix is to, in the netpoll code, only attempt to take the lock, and fail if it is already acquired (rather than block on it), and queue the message to be sent for later delivery. Any user of netpoll code in the kernel (netdump or netconsole services), is exposed to this problem, and should resolve the issue by upgrading to this kernel release immediately.

* A flaw was found where, under 64-bit mode (x86_64), AMD processors were not able to address greater than a 40-bit physical address space;
and Intel processors were only able to address up to a 36-bit physical address space. The fix is to increase the physical addressing for an AMD processor to 48 bits, and an Intel processor to 38 bits. Please see the Red Hat Knowledgebase for more detailed information.

* A flaw was found in the xenU kernel that may prevent a paravirtualized guest with more than one CPU from starting when running under an Enterprise Linux 5.1 hypervisor. The fix is to allow your Enterprise Linux 4 Xen SMP guests to boot under a 5.1 hypervisor.
Please see the Red Hat Knowledgebase for more detailed information.

Red Hat Enterprise Linux 4 users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

- A flaw was found in the handling of process death     signals. This allowed a local user to send arbitrary     signals to the suid-process executed by that user. A     successful exploitation of this flaw depends on the     structure of the suid-program and its signal handling.
    (CVE-2007-3848, Important)

  - A flaw was found in the CIFS file system. This could     cause the umask values of a process to not be honored on     CIFS file systems where UNIX extensions are supported.
    (CVE-2007-3740, Important)

  - A flaw was found in the VFAT compat ioctl handling on     64-bit systems. This allowed a local user to corrupt a     kernel_dirent struct and cause a denial of service.
    (CVE-2007-2878, Important)

  - A flaw was found in the Advanced Linux Sound     Architecture (ALSA). A local user who had the ability to     read the /proc/driver/snd-page-alloc file could see     portions of kernel memory. (CVE-2007-4571, Moderate)

  - A flaw was found in the aacraid SCSI driver. This     allowed a local user to make ioctl calls to the driver     that should be restricted to privileged users.
    (CVE-2007-4308, Moderate)

  - A flaw was found in the stack expansion when using the     hugetlb kernel on PowerPC systems. This allowed a local     user to cause a denial of service. (CVE-2007-3739,     Moderate)

  - A flaw was found in the handling of zombie processes. A     local user could create processes that would not be     properly reaped which could lead to a denial of service.
    (CVE-2006-6921, Moderate)

  - A flaw was found in the CIFS file system handling. The     mount option 'sec=' did not enable integrity checking or     produce an error message if used. (CVE-2007-3843, Low)

  - A flaw was found in the random number generator     implementation that allowed a local user to cause a     denial of service or possibly gain privileges. This flaw     could be exploited if the root user raised the default     wakeup threshold over the size of the output pool.
    (CVE-2007-3105, Low)

Additionally, the following bugs were fixed :

  - A flaw was found in the kernel netpoll code, creating a     potential deadlock condition. If the xmit_lock for a     given network interface is held, and a subsequent     netpoll event is generated from within the lock owning     context (a console message for example), deadlock on     that cpu will result, because the netpoll code will     attempt to re-acquire the xmit_lock. The fix is to, in     the netpoll code, only attempt to take the lock, and     fail if it is already acquired (rather than block on     it), and queue the message to be sent for later     delivery. Any user of netpoll code in the kernel     (netdump or netconsole services), is exposed to this     problem, and should resolve the issue by upgrading to     this kernel release immediately.

  - A flaw was found where, under 64-bit mode (x86_64), AMD     processors were not able to address greater than a     40-bit physical address space; and Intel processors were     only able to address up to a 36-bit physical address     space. The fix is to increase the physical addressing     for an AMD processor to 48 bits, and an Intel processor     to 38 bits.

  - A flaw was found in the xenU kernel that may prevent a     paravirtualized guest with more than one CPU from     starting when running under an Scientific Linux 5.1     hypervisor. The fix is to allow your Scientific Linux 4     Xen SMP guests to boot under a 5.1 hypervisor.

These new kernel packages contain fixes for the following security issues :

  - A flaw was found in the backported stack unwinder fixes     in Red Hat Enterprise Linux 5. On AMD64 and Intel 64     platforms, a local user could trigger this flaw and     cause a denial of service. (CVE-2007-4574, Important)

  - A flaw was found in the handling of process death     signals. This allowed a local user to send arbitrary     signals to the suid-process executed by that user. A     successful exploitation of this flaw depends on the     structure of the suid-program and its signal handling.
    (CVE-2007-3848, Important)

  - A flaw was found in the Distributed Lock Manager (DLM)     in the cluster manager. This allowed a remote user who     is able to connect to the DLM port to cause a denial of     service. (CVE-2007-3380, Important)

  - A flaw was found in the aacraid SCSI driver. This     allowed a local user to make ioctl calls to the driver     which should otherwise be restricted to privileged     users. (CVE-2007-4308, Moderate)

  - A flaw was found in the prio_tree handling of the     hugetlb support that allowed a local user to cause a     denial of service. This only affected kernels with     hugetlb support. (CVE-2007-4133, Moderate)

  - A flaw was found in the eHCA driver on PowerPC     architectures that allowed a local user to access 60k of     physical address space. This address space could contain     sensitive information. (CVE-2007-3850, Moderate)

  - A flaw was found in ptrace support that allowed a local     user to cause a denial of service via a NULL pointer     dereference. (CVE-2007-3731, Moderate)

  - A flaw was found in the usblcd driver that allowed a     local user to cause a denial of service by writing data     to the device node. To exploit this issue, write access     to the device node was needed. (CVE-2007-3513, Moderate)

  - A flaw was found in the random number generator     implementation that allowed a local user to cause a     denial of service or possibly gain privileges. If the     root user raised the default wakeup threshold over the     size of the output pool, this flaw could be exploited.
    (CVE-2007-3105, Low)

In addition to the security issues described above, several bug fixes preventing possible system crashes and data corruption were also included.

This kernel update fixes the following security problems :

  - The IPv6 protocol allows remote attackers to cause a     denial of service via crafted IPv6 type 0 route headers     (IPV6_RTHDR_TYPE_0) that create network amplification     between two routers. (CVE-2007-2242)

    The default is that RH0 is disabled now. To adjust this,     write to the file /proc/net/accept_source_route6.

  - The random number feature in the Linux kernel 2.6 (1)     did not properly seed pools when there is no entropy, or     (2) used an incorrect cast when extracting entropy,     which might have caused the random number generator to     provide the same values after reboots on systems without     an entropy source. (CVE-2007-2453)

  - A NULL pointer dereference in SCTP connection tracking     could be caused by a remote attacker by sending     specially crafted packets. Note that this requires SCTP     set-up and active to be exploitable. (CVE-2007-2876)

  - Stack-based buffer overflow in the random number     generator (RNG) implementation in the Linux kernel     before 2.6.22 might allow local root users to cause a     denial of service or gain privileges by setting the     default wakeup threshold to a value greater than the     output pool size, which triggers writing random numbers     to the stack by the pool transfer function involving     'bound check ordering'. (CVE-2007-3105)

    Since this value can only be changed by a root user,     exploitability is low.

  - The signal handling in the Linux kernel, when run on     PowerPC systems using HTX, allows local users to cause a     denial of service via unspecified vectors involving     floating point corruption and concurrency.
    (CVE-2007-3107)

  - Memory leak in the PPP over Ethernet (PPPoE) socket     implementation in the Linux kernel allowed local users     to cause a denial of service (memory consumption) by     creating a socket using connect, and releasing it before     the PPPIOCGCHAN ioctl is initialized. (CVE-2007-2525)

  - The lcd_write function in drivers/usb/misc/usblcd.c in     the Linux kernel did not limit the amount of memory used     by a caller, which allowed local users to cause a denial     of service (memory consumption). (CVE-2007-3513)

  - A local attacker could send a death signal to a setuid     root program under certain conditions, potentially     causing unwanted behaviour in this program.
    (CVE-2007-3848)

  - On machines with a Intel i965 based graphics card local     users with access to the direct rendering devicenode     could overwrite memory on the machine and so gain root     privileges. (CVE-2007-3851)

  - Fixed a denial of service possibility where a local     attacker with access to a pwc camera device could hang     the USB subsystem. [#302194]

and the following non security bugs :

  - patches.arch/ppc-oprofile-970mp.patch: enable ppc64/970     MP, requires oprofile 0.9.3 [#252696]

  - patches.arch/x86_64-no-tsc-with-C3: don't use TSC on     x86_64 Intel systems when CPU has C3 [#254061]

  - patches.arch/x86_64-hpet-lost-interrupts-fix.patch:
    backport x86_64 hpet lost interrupts code [#257035]

  - patches.fixes/fusion-nat-consumption-fix: handle a     potential race in mptbase. This fixes a NaT consumption     crash [#257412]

  - patches.arch/ia64-skip-clock-calibration: enabled     [#259501]

  - patches.fixes/md-raid1-handle-read-error: Correctly     handle read errors from a failed drive in raid1     [#261459]

  - patches.arch/ia64-fix-kdump-on-init: kdump on INIT needs     multi-nodes sync-up (v.2) [#265764]

  - patches.arch/ia64-perfmon-fix-2: race condition between     pfm_context_create and pfm_read [#268131]

  - patches.fixes/cpufreq_ppc_boot_option.patch: workaround     for _PPC (BIOS cpufreq limitations) [#269579]

  - patches.arch/acpi_package_object_support.patch: ACPI     package object as method parameter support (in AML)     [#270956]

  - patches.fixes/ia64_cpufreq_PDC.patch: correctly assign     as cpufreq capable driver (_PDC) to BIOS [#270973]

  - patches.arch/ia64-kdump-hpzx1-ioc-workaround: update to     latest upstream version of the patch [#271158]

  - patches.suse/delayacct_memleak.patch: Fix delayacct     memory leak [#271187]

  - patches.fixes/fc_transport-check-portstate-before-scan:
    check FC portstates before invoking target scan     [#271338]

  - patches.fixes/unusual14cd.patch: quirk for 14cd:6600     [#274087]

  -     patches.fixes/reiserfs-change_generation_on_update_sd.di     ff: fix assertion failure in reiserfs [#274288]

  -     patches.drivers/d-link-dge-530t-should-use-the-skge-driv     er.patch: D-Link DGE-530T should use the skge driver     [#275376]

  - patches.arch/ia64-dont-unwind-running-tasks.patch: Only     unwind non-running tasks [#275854]

  - patches.fixes/dm-mpath-rdac-avt-support: short circuit     RDAC hardware handler in AVT mode [#277834]

  - patches.fixes/lkcd-re-enable-valid_phys_addr_range:
    re-enable the valid_phys_addr_range() check [#279433]

  - patches.drivers/cciss-panic-on-reboot: when root     filesystem is xfs the server cannot do a second reboot     [#279436] Also resolves same issue in [#291759].

  - patches.drivers/ide-hpt366-fix-302n-oops: fix hpt302n     oops [#279705]

  - patches.fixes/serial-8250-backup-timer-2-deadlock-fix:
    fix possible deadlock [#280771]

  - patches.fixes/nfs-osync-error-return: ensure proper     error return from O_SYNC writes [#280833]

  - patches.fixes/acpi_pci_hotplug_poweroff.patch: ACPI PCI     hotplug driver acpiphp unable to power off PCI slot     [#281234]

  -     patches.drivers/pci-hotplug-acpiphp-remove-hot-plug-para     meter-write-to-pci-host-bridge.patch: remove hot plug     parameter write to PCI host bridge [#281239]

  - patches.fixes/scsi-set-correct-resid: Incorrect 'resid'     field values when using a tape device [#281640]

  - patches.drivers/usb-edgeport-epic-support.patch: USB:
    add EPIC support to the io_edgeport driver [#281921]

  - patches.fixes/usb-hid-ncr-no-init-reports.patch: HID:
    Don't initialize reports for NCR devices [#281921]

  - patches.drivers/ppc-power6-ehea.patch: use decimal     values in sysfs propery logical_port_id, fix panic when     adding / removing logical eHEA ports [#283070]

  - patches.arch/ppc-power6-ebus.patch: DLPAR Adapter     add/remove functionality for eHEA [#283239]

  - patches.fixes/nfs-enospc: Return ENOSPC and EDQUOT to     NFS write requests more promptly [#284042]

  -     patches.drivers/pci-hotplug-acpiphp-avoid-acpiphp-cannot
    -get-bridge-info-pci-hotplug-failure.patch: PCI:
    hotplug: acpiphp: avoid acpiphp 'cannot get bridge info'     PCI hotplug failure [#286193]

  - patches.drivers/lpfc-8.1.10.9-update: lpfc update to     8.1.10.9 [#286223]

  - patches.fixes/make-swappiness-safer-to-use.patch: Handle     low swappiness gracefully [#288799]

  - patches.arch/ppc-oprofile-power5plusplus.patch: oprofile     support for Power 5++ [#289223]

  - patches.drivers/ppc-power6-ehea.patch: Fixed possible     kernel panic on VLAN packet recv [#289301]

  - patches.fixes/igrab_should_check_for_i_clear.patch:
    igrab() should check for I_CLEAR [#289576]

  - patches.fixes/wait_for_sysfs_population.diff: Driver     core: bus device event delay [#289964]

  -     patches.drivers/scsi-throttle-SG_DXFER_TO_FROM_DEV-warni     ng-better: better throttling of SG_DXFER_TO_FROM_DEV     warning messages [#290117]

  -     patches.arch/mark-unwind-info-for-signal-trampolines-in-     vdsos.patch: Mark unwind info for signal trampolines in     vDSOs [#291421]

  - patches.fixes/hugetlbfs-stack-grows-fix.patch: don't     allow the stack to grow into hugetlb reserved regions     [#294021]

  - patches.drivers/alsa-post-sp1-hda-analog-update: add     support of of missing AD codecs [#294471]

  - patches.drivers/alsa-post-sp1-hda-conexant-fixes: fix     unterminated arrays [#294480]

  - patches.fixes/fix_hpet_init_race.patch: fix a race in     HPET initialization on x86_64 resulting in a lockup on     boot [#295115]

  - patches.drivers/alsa-post-sp1-hda-sigmatel-pin-fix: Fix     number of pin widgets with STAC codecs [#295653]

  -     patches.fixes/pci-pcieport-driver-remove-invalid-warning
    -message.patch: PCI: pcieport-driver: remove invalid     warning message [#297135] [#298561]

  - patches.kernel.org/patch-2.6.16.NN-$((NN+1)), NN =     18,...,52: update to Kernel 2.6.16.53; lots of bugfixes     [#298719] [#186582] [#186583] [#186584]

  - patches.fixes/ocfs2-1.2-svn-r3027.diff: proactive patch     [#298845]

  - patches.drivers/b44-phy-fix: Fix frequent PHY resets     under load on b44 [#301653]

  - dd patches.arch/ppc-eeh-node-status-okay.patch firmware     returns 'okay' instead of 'ok' for node status [#301788]

Updated kernel packages that fix various security issues in the Red Hat Enterprise Linux 5 kernel are now available.

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

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the following security issues :

* A flaw was found in the backported stack unwinder fixes in Red Hat Enterprise Linux 5. On AMD64 and Intel 64 platforms, a local user could trigger this flaw and cause a denial of service. (CVE-2007-4574, Important)

* A flaw was found in the handling of process death signals. This allowed a local user to send arbitrary signals to the suid-process executed by that user. A successful exploitation of this flaw depends on the structure of the suid-program and its signal handling.
(CVE-2007-3848, Important)

* A flaw was found in the Distributed Lock Manager (DLM) in the cluster manager. This allowed a remote user who is able to connect to the DLM port to cause a denial of service. (CVE-2007-3380, Important)

* A flaw was found in the aacraid SCSI driver. This allowed a local user to make ioctl calls to the driver which should otherwise be restricted to privileged users. (CVE-2007-4308, Moderate)

* A flaw was found in the prio_tree handling of the hugetlb support that allowed a local user to cause a denial of service. This only affected kernels with hugetlb support. (CVE-2007-4133, Moderate)

* A flaw was found in the eHCA driver on PowerPC architectures that allowed a local user to access 60k of physical address space. This address space could contain sensitive information. (CVE-2007-3850, Moderate)

* A flaw was found in ptrace support that allowed a local user to cause a denial of service via a NULL pointer dereference.
(CVE-2007-3731, Moderate)

* A flaw was found in the usblcd driver that allowed a local user to cause a denial of service by writing data to the device node. To exploit this issue, write access to the device node was needed.
(CVE-2007-3513, Moderate)

* A flaw was found in the random number generator implementation that allowed a local user to cause a denial of service or possibly gain privileges. If the root user raised the default wakeup threshold over the size of the output pool, this flaw could be exploited.
(CVE-2007-3105, Low)

In addition to the security issues described above, several bug fixes preventing possible system crashes and data corruption were also included.

Red Hat Enterprise Linux 5 users are advised to upgrade to these packages, which contain backported patches to resolve these issues.

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

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

The Linux kernel is the core of the operating system.

These updated kernel packages contain fixes for the following security issues :

* A flaw was found in the handling of process death signals. This allowed a local user to send arbitrary signals to the suid-process executed by that user. A successful exploitation of this flaw depends on the structure of the suid-program and its signal handling.
(CVE-2007-3848, Important)

* A flaw was found in the CIFS file system. This could cause the umask values of a process to not be honored on CIFS file systems where UNIX extensions are supported. (CVE-2007-3740, Important)

* A flaw was found in the VFAT compat ioctl handling on 64-bit systems. This allowed a local user to corrupt a kernel_dirent struct and cause a denial of service. (CVE-2007-2878, Important)

* A flaw was found in the Advanced Linux Sound Architecture (ALSA). A local user who had the ability to read the /proc/driver/snd-page-alloc file could see portions of kernel memory. (CVE-2007-4571, Moderate)

* A flaw was found in the aacraid SCSI driver. This allowed a local user to make ioctl calls to the driver that should be restricted to privileged users. (CVE-2007-4308, Moderate)

* A flaw was found in the stack expansion when using the hugetlb kernel on PowerPC systems. This allowed a local user to cause a denial of service. (CVE-2007-3739, Moderate)

* A flaw was found in the handling of zombie processes. A local user could create processes that would not be properly reaped which could lead to a denial of service. (CVE-2006-6921, Moderate)

* A flaw was found in the CIFS file system handling. The mount option 'sec=' did not enable integrity checking or produce an error message if used. (CVE-2007-3843, Low)

* A flaw was found in the random number generator implementation that allowed a local user to cause a denial of service or possibly gain privileges. This flaw could be exploited if the root user raised the default wakeup threshold over the size of the output pool.
(CVE-2007-3105, Low)

Additionally, the following bugs were fixed :

* A flaw was found in the kernel netpoll code, creating a potential deadlock condition. If the xmit_lock for a given network interface is held, and a subsequent netpoll event is generated from within the lock owning context (a console message for example), deadlock on that cpu will result, because the netpoll code will attempt to re-acquire the xmit_lock. The fix is to, in the netpoll code, only attempt to take the lock, and fail if it is already acquired (rather than block on it), and queue the message to be sent for later delivery. Any user of netpoll code in the kernel (netdump or netconsole services), is exposed to this problem, and should resolve the issue by upgrading to this kernel release immediately.

* A flaw was found where, under 64-bit mode (x86_64), AMD processors were not able to address greater than a 40-bit physical address space;
and Intel processors were only able to address up to a 36-bit physical address space. The fix is to increase the physical addressing for an AMD processor to 48 bits, and an Intel processor to 38 bits. Please see the Red Hat Knowledgebase for more detailed information.

* A flaw was found in the xenU kernel that may prevent a paravirtualized guest with more than one CPU from starting when running under an Enterprise Linux 5.1 hypervisor. The fix is to allow your Enterprise Linux 4 Xen SMP guests to boot under a 5.1 hypervisor.
Please see the Red Hat Knowledgebase for more detailed information.

Red Hat Enterprise Linux 4 users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2006-5823     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted cramfs filesystem.

  - CVE-2006-6054     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted ext2 filesystem.

  - CVE-2006-6058     LMH reported an issue in the minix filesystem that     allows local users with mount privileges to create a DoS     (printk flood) by mounting a specially crafted corrupt     filesystem.

  - CVE-2006-7203     OpenVZ Linux kernel team reported an issue in the smbfs     filesystem which can be exploited by local users to     cause a DoS (oops) during mount.

  - CVE-2007-1353     Ilja van Sprundel discovered that kernel memory could be     leaked via the Bluetooth setsockopt call due to an     uninitialized stack buffer. This could be used by local     attackers to read the contents of sensitive kernel     memory.

  - CVE-2007-2172     Thomas Graf reported a typo in the DECnet protocol     handler that could be used by a local attacker to     overrun an array via crafted packets, potentially     resulting in a Denial of Service (system crash). A     similar issue exists in the IPV4 protocol handler and     will be fixed in a subsequent update.

  - CVE-2007-2525     Florian Zumbiehl discovered a memory leak in the PPPOE     subsystem caused by releasing a socket before     PPPIOCGCHAN is called upon it. This could be used by a     local user to DoS a system by consuming all available     memory.

  - CVE-2007-3105     The PaX Team discovered a potential buffer overflow in     the random number generator which may permit local users     to cause a denial of service or gain additional     privileges. This issue is not believed to effect default     Debian installations where only root has sufficient     privileges to exploit it.

  - CVE-2007-3739     Adam Litke reported a potential local denial of service     (oops) on powerpc platforms resulting from unchecked VMA     expansion into address space reserved for hugetlb pages.

  - CVE-2007-3740     Steve French reported that CIFS filesystems with     CAP_UNIX enabled were not honoring a process' umask     which may lead to unintentionally relaxed permissions.

  - CVE-2007-3848     Wojciech Purczynski discovered that pdeath_signal was     not being reset properly under certain conditions which     may allow local users to gain privileges by sending     arbitrary signals to suid binaries.

  - CVE-2007-4133     Hugh Dickins discovered a potential local DoS (panic) in     hugetlbfs. A misconversion of hugetlb_vmtruncate_list to     prio_tree may allow local users to trigger a BUG_ON()     call in exit_mmap.

  - CVE-2007-4308     Alan Cox reported an issue in the aacraid driver that     allows unprivileged local users to make ioctl calls     which should be restricted to admin privileges.

  - CVE-2007-4573     Wojciech Purczynski discovered a vulnerability that can     be exploited by a local user to obtain superuser     privileges on x86_64 systems. This resulted from     improper clearing of the high bits of registers during     ia32 system call emulation. This vulnerability is     relevant to the Debian amd64 port as well as users of     the i386 port who run the amd64 linux-image flavour.

  - CVE-2007-5093     Alex Smith discovered an issue with the pwc driver for     certain webcam devices. If the device is removed while a     userspace application has it open, the driver will wait     for userspace to close the device, resulting in a     blocked USB subsystem. This issue is of low security     impact as it requires the attacker to either have     physical access to the system or to convince a user with     local access to remove the device on their behalf.

  - CVE-2007-6063     Venustech AD-LAB discovered a a buffer overflow in the     isdn ioctl handling, exploitable by a local user.

  - CVE-2007-6151     ADLAB discovered a possible memory overrun in the ISDN     subsystem that may permit a local user to overwrite     kernel memory by issuing ioctls with unterminated data.

  - CVE-2007-6206     Blake Frantz discovered that when a core file owned by a     non-root user exists, and a root-owned process dumps     core over it, the core file retains its original     ownership. This could be used by a local user to gain     access to sensitive information.

  - CVE-2007-6694     Cyrill Gorcunov reported a NULL pointer dereference in     code specific to the CHRP PowerPC platforms. Local users     could exploit this issue to achieve a Denial of Service     (DoS).

  - CVE-2008-0007     Nick Piggin of SuSE discovered a number of issues in     subsystems which register a fault handler for memory     mapped areas. This issue can be exploited by local users     to achieve a Denial of Service (DoS) and possibly     execute arbitrary code.

The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update :

                             Debian 3.1 (sarge)            kernel-image-2.6.8-alpha    2.6.8-17sarge1                kernel-image-2.6.8-amd64    2.6.8-17sarge1                kernel-image-2.6.8-hppa     2.6.8-7sarge1                 kernel-image-2.6.8-i386     2.6.8-17sarge1                kernel-image-2.6.8-ia64     2.6.8-15sarge1                kernel-image-2.6.8-m68k     2.6.8-5sarge1                 kernel-image-2.6.8-s390     2.6.8-6sarge1                 kernel-image-2.6.8-sparc    2.6.8-16sarge1                kernel-patch-powerpc-2.6.8  2.6.8-13sarge1                fai-kernels                 1.9.1sarge8

A flaw was discovered in the PPP over Ethernet implementation. Local attackers could manipulate ioctls and cause kernel memory consumption leading to a denial of service. (CVE-2007-2525)

An integer underflow was discovered in the cpuset filesystem. If mounted, local attackers could obtain kernel memory using large file offsets while reading the tasks file. This could disclose sensitive data. (CVE-2007-2875)

Vilmos Nebehaj discovered that the SCTP netfilter code did not correctly validate certain states. A remote attacker could send a specially crafted packet causing a denial of service. (CVE-2007-2876)

Luca Tettamanti discovered a flaw in the VFAT compat ioctls on 64-bit systems. A local attacker could corrupt a kernel_dirent struct and cause a denial of service. (CVE-2007-2878)

A flaw in the sysfs_readdir function allowed a local user to cause a denial of service by dereferencing a NULL pointer. (CVE-2007-3104)

A buffer overflow was discovered in the random number generator. In environments with granular assignment of root privileges, a local attacker could gain additional privileges. (CVE-2007-3105)

A flaw was discovered in the usblcd driver. A local attacker could cause large amounts of kernel memory consumption, leading to a denial of service. (CVE-2007-3513)

Zhongling Wen discovered that the h323 conntrack handler did not correctly handle certain bitfields. A remote attacker could send a specially crafted packet and cause a denial of service.
(CVE-2007-3642)

A flaw was discovered in the CIFS mount security checking. Remote attackers could spoof CIFS network traffic, which could lead a client to trust the connection. (CVE-2007-3843)

It was discovered that certain setuid-root processes did not correctly reset process death signal handlers. A local user could manipulate this to send signals to processes they would not normally have access to. (CVE-2007-3848)

The Direct Rendering Manager for the i915 driver could be made to write to arbitrary memory locations. An attacker with access to a running X11 session could send a specially crafted buffer and gain root privileges. (CVE-2007-3851)

It was discovered that the aacraid SCSI driver did not correctly check permissions on certain ioctls. A local attacker could cause a denial of service or gain privileges. (CVE-2007-4308).

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.

A flaw in the sysfs_readdir function allowed a local user to cause a denial of service by dereferencing a NULL pointer. (CVE-2007-3104)

A buffer overflow was discovered in the random number generator. In environments with granular assignment of root privileges, a local attacker could gain additional privileges. (CVE-2007-3105)

A flaw was discovered in the usblcd driver. A local attacker could cause large amounts of kernel memory consumption, leading to a denial of service. (CVE-2007-3513)

It was discovered that certain setuid-root processes did not correctly reset process death signal handlers. A local user could manipulate this to send signals to processes they would not normally have access to. (CVE-2007-3848)

The Direct Rendering Manager for the i915 driver could be made to write to arbitrary memory locations. An attacker with access to a running X11 session could send a specially crafted buffer and gain root privileges. (CVE-2007-3851)

It was discovered that the aacraid SCSI driver did not correctly check permissions on certain ioctls. A local attacker could cause a denial of service or gain privileges. (CVE-2007-4308).

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.

A buffer overflow was discovered in the Moxa serial driver. Local attackers could execute arbitrary code and gain root privileges.
(CVE-2005-0504)

A flaw was discovered in the IPv6 stack's handling of type 0 route headers. By sending a specially crafted IPv6 packet, a remote attacker could cause a denial of service between two IPv6 hosts.
(CVE-2007-2242)

A flaw in the sysfs_readdir function allowed a local user to cause a denial of service by dereferencing a NULL pointer. (CVE-2007-3104)

A buffer overflow was discovered in the random number generator. In environments with granular assignment of root privileges, a local attacker could gain additional privileges. (CVE-2007-3105)

It was discovered that certain setuid-root processes did not correctly reset process death signal handlers. A local user could manipulate this to send signals to processes they would not normally have access to. (CVE-2007-3848)

It was discovered that the aacraid SCSI driver did not correctly check permissions on certain ioctls. A local attacker could cause a denial of service or gain privileges. (CVE-2007-4308).

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.

Some vulnerabilities were discovered and corrected in the Linux 2.6 kernel :

A stack-based buffer overflow in the random number generator could allow local root users to cause a denial of service or gain privileges by setting the default wakeup threshold to a value greater than the output pool size (CVE-2007-3105).

The lcd_write function did not limit the amount of memory used by a caller, which allows local users to cause a denial of service (memory consumption) (CVE-2007-3513).

The decode_choice function allowed remote attackers to cause a denial of service (crash) via an encoded out-of-range index value for a choice field which triggered a NULL pointer dereference (CVE-2007-3642).

The Linux kernel allowed local users to send arbitrary signals to a child process that is running at higher privileges by causing a setuid-root parent process to die which delivered an attacker-controlled parent process death signal (PR_SET_PDEATHSIG) (CVE-2007-3848).

The aac_cfg_openm and aac_compat_ioctl functions in the SCSI layer ioctl patch in aacraid did not check permissions for ioctls, which might allow local users to cause a denial of service or gain privileges (CVE-2007-4308).

The IA32 system call emulation functionality, when running on the x86_64 architecture, did not zero extend the eax register after the 32bit entry path to ptrace is used, which could allow local users to gain privileges by triggering an out-of-bounds access to the system call table using the %RAX register (CVE-2007-4573).

In addition to these security fixes, other fixes have been included such as :

  - More NVidia PCI ids wre added

    - The 3w-9xxx module was updated to version 2.26.02.010

    - Fixed the map entry for ICH8

    - Added the TG3 5786 PCI id

    - Reduced the log verbosity of cx88-mpeg

To update your kernel, please follow the directions located at :

http://www.mandriva.com/en/security/kernelupdate

This kernel update fixes the following security problems :

  - CVE-2007-3105: Stack-based buffer overflow in the random     number generator (RNG) implementation in the Linux     kernel before 2.6.22 might allow local root users to     cause a denial of service or gain privileges by setting     the default wake-up threshold to a value greater than     the output pool size, which triggers writing random     numbers to the stack by the pool transfer function     involving 'bound check ordering'. Since this value can     only be changed by a root user, exploitability is low.

  - CVE-2007-2525: A memory leak in the PPPoE driver can be     abused by local users to cause a denial-of-service     condition.

  - CVE-2007-3851: On machines with a Intel i965 based     graphics card local users with access to the direct     rendering devicenode could overwrite memory on the     machine and so gain root privileges.

  - CVE-2007-4573: It was possible for local user to become     root by exploitable a bug in the IA32 system call     emulation. This affects x86_64 platforms with kernel     2.4.x and 2.6.x before 2.6.22.7 only.

  - CVE-2007-4571: An information disclosure vulnerability     in the ALSA driver can be exploited by local users to     read sensitive data from the kernel memory.

and the following non security bugs :

    - patches.arch/x86-fam10-mtrr: mtrr: fix size_or_mask       and size_and_mask [#237736]

    - patches.fixes/usb_nokia6233_fix1.patch: usb:
      rndis_host: fix crash while probing a Nokia S60 mobile       [#244459]

    - patches.fixes/usb_nokia6233_fix2.patch: usbnet: init       fault (oops) cleanup, whitespace fixes [#244459]

    - patches.fixes/usb_nokia6233_fix2.patch: usb:
      unusual_devs.h entry for Nokia 6233 [#244459]

    - patches.fixes/bt_broadcom_reset.diff: quirky Broadcom       device [#257303]

    - patches.arch/i386-compat-vdso: i386: allow debuggers       to access the vsyscall page with compat vDSO [#258433]

  - -     patches.fixes/anycast6-unbalanced-inet6_dev-refcnt.patch     : Fix netdevice reference leak when reading from     /proc/net/anycast6 [#285336]

  - -     patches.drivers/scsi-throttle-SG_DXFER_TO_FROM_DEV-warni     ng-b etter: SCSI: throttle SG_DXFER_TO_FROM_DEV warning     message better [#290117]

  - -     patches.fixes/nf_conntrack_h323-out-of-bounds-index.diff     : nf_conntrack_h323: add checking of out-of-range on     choices' index values [#290611]

    - patches.fixes/ppc-fpu-corruption-fix.diff: ppc: fix       corruption of fpu [#290622]

  - -     patches.fixes/ppp-fix-osize-too-small-errors-when-decodi     ng-m ppe.diff: ppp: Fix osize too small errors when     decoding mppe [#291102]

    - patches.fixes/hugetlbfs-stack-grows-fix.patch: Don't       allow the stack to grow into hugetlb reserved regions       [#294021]

    - patches.fixes/pwc_dos.patch: fix a disconnect method       waiting for user space to close a file. A malicious       user can stall khubd indefinitely long [#302063]       [#302194]

    - patches.suse/kdb.add-unwind-info-to-kdb_call: Add       unwind info to kdb_call() to fix build of KDB kernel       on i386 [#305209]

    - Updated config files: enable KDB for kernel-debug on       i386. [#305209]

This kernel update brings the kernel to the one shipped with SLES 10 Service Pack 1 and also fixes the following security problems:

- CVE-2007-2242: The IPv6 protocol allows remote attackers   to cause a denial of service via crafted IPv6 type 0   route headers (IPV6_RTHDR_TYPE_0) that create network   amplification between two routers. 

  The default is that RH0 is disabled now. To adjust this, write to the file /proc/net/accept_source_route6.

- CVE-2007-2453: The random number feature in the Linux   kernel 2.6 (1) did not properly seed pools when there is   no entropy, or (2) used an incorrect cast when extracting   entropy, which might have caused the random number   generator to provide the same values after reboots on   systems without an entropy source.

- CVE-2007-2876: A NULL pointer dereference in SCTP   connection tracking could be caused by a remote attacker   by sending specially crafted packets. Note that this   requires SCTP set-up and active to be exploitable.

- CVE-2007-3105: Stack-based buffer overflow in the random   number generator (RNG) implementation in the Linux kernel   before 2.6.22 might allow local root users to cause a   denial of service or gain privileges by setting the   default wakeup threshold to a value greater than the   output pool size, which triggers writing random numbers   to the stack by the pool transfer function involving   'bound check ordering'.

  Since this value can only be changed by a root user, exploitability is low.

- CVE-2007-3107: The signal handling in the Linux kernel,   when run on PowerPC systems using HTX, allows local users   to cause a denial of service via unspecified vectors   involving floating point corruption and concurrency.

- CVE-2007-2525: Memory leak in the PPP over Ethernet   (PPPoE) socket implementation in the Linux kernel allowed   local users to cause a denial of service (memory   consumption) by creating a socket using connect, and   releasing it before the PPPIOCGCHAN ioctl is initialized.

- CVE-2007-3513: The lcd_write function in   drivers/usb/misc/usblcd.c in the Linux kernel did not   limit the amount of memory used by a caller, which   allowed local users to cause a denial of service (memory   consumption).

- CVE-2007-3851: On machines with a Intel i965 based   graphics card local users with access to the direct   rendering devicenode could overwrite memory on the   machine and so gain root privileges.

This kernel is not compatible to the previous SUSE Linux 10.1 kernel, so the Kernel Module Packages will need to be updated.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2007-2172     Thomas Graf reported a typo in the IPv4 protocol handler     that could be used by a local attacker to overrun an     array via crafted packets, potentially resulting in a     Denial of Service (system crash). The DECnet counterpart     of this issue was already fixed in DSA-1356.

  - CVE-2007-2875     iDefense reported a potential integer underflow in the     cpuset filesystem which may permit local attackers to     gain access to sensitive kernel memory. This     vulnerability is only exploitable if the cpuset     filesystem is mounted.

  - CVE-2007-3105     The PaX Team discovered a potential buffer overflow in     the random number generator which may permit local users     to cause a denial of service or gain additional     privileges. This issue is not believed to effect default     Debian installations where only root has sufficient     privileges to exploit it.

  - CVE-2007-3843     A coding error in the CIFS subsystem permits the use of     unsigned messages even if the client has configured the     system to enforce signing by passing the sec=ntlmv2i     mount option. This may allow remote attackers to spoof     CIFS network traffic.

  - CVE-2007-4308     Alan Cox reported an issue in the aacraid driver that     allows unprivileged local users to make ioctl calls     which should be restricted to admin privileges.

These problems have been fixed in the stable distribution in version 2.6.18.dfsg.1-13etch2.

The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update :

                    Debian 4.0 (etch)    fai-kernels        1.17+etch5           user-mode-linux    2.6.18-1um-2etch4

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2007-0940.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2007-0939.

ID	Name	Product	Family	Severity
67581	Oracle Linux 5 : Important:kernel (ELSA-2007-0940)	Nessus	Oracle Linux Local Security Checks	medium
67580	Oracle Linux 4 : kernel (ELSA-2007-0939)	Nessus	Oracle Linux Local Security Checks	medium
60280	Scientific Linux Security Update : kernel on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
60272	Scientific Linux Security Update : kernel on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
59123	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 4186)	Nessus	SuSE Local Security Checks	high
43654	CentOS 5 : kernel (CESA-2007:0940)	Nessus	CentOS Local Security Checks	medium
37953	CentOS 4 : kernel (CESA-2007:0939)	Nessus	CentOS Local Security Checks	medium
31148	Debian DSA-1504-1 : kernel-source-2.6.8 - several vulnerabilities	Nessus	Debian Local Security Checks	high
29487	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 4185)	Nessus	SuSE Local Security Checks	high
28114	Ubuntu 7.04 : linux-source-2.6.20 vulnerabilities (USN-510-1)	Nessus	Ubuntu Local Security Checks	high
28113	Ubuntu 6.10 : linux-source-2.6.17 vulnerabilities (USN-509-1)	Nessus	Ubuntu Local Security Checks	medium
28112	Ubuntu 6.06 LTS : linux-source-2.6.15 vulnerabilities (USN-508-1)	Nessus	Ubuntu Local Security Checks	high
27616	RHEL 4 : kernel (RHSA-2007:0939)	Nessus	Red Hat Local Security Checks	medium
27565	RHEL 5 : kernel (RHSA-2007:0940)	Nessus	Red Hat Local Security Checks	medium
27561	Mandrake Linux Security Advisory : kernel (MDKSA-2007:195)	Nessus	Mandriva Local Security Checks	high
27298	openSUSE 10 Security Update : kernel (kernel-4487)	Nessus	SuSE Local Security Checks	high
27296	SuSE Security Update: Kernel Update for SUSE Linux 10.1 (kernel-4193)	Nessus	SuSE Local Security Checks	high
25963	Debian DSA-1363-1 : linux-2.6 - several vulnerabilities	Nessus	Debian Local Security Checks	medium
801440	CentOS RHSA-2007-0940 Security Check	Log Correlation Engine	Generic	high
801439	CentOS RHSA-2007-0939 Security Check	Log Correlation Engine	Generic	high

Detections

Analytics

CVE-2007-3105

high

Tenable Plugins

medium

medium

medium

medium

high

medium

medium

high

high

high

medium

high

medium

medium

high

high

high

medium

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high