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RedHatRHSA-2009:0451
HistoryApr 29, 2009 - 12:00 a.m.

(RHSA-2009:0451) Important: kernel-rt security and bug fix update

2009-04-2900:00:00
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14

4.7 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

29.8%

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

These updated packages fix the following security issues:

  • a logic error was found in the do_setlk() function of the Linux kernel
    Network File System (NFS) implementation. If a signal interrupted a lock
    request, the local POSIX lock was incorrectly created. This could cause a
    denial of service on the NFS server if a file descriptor was closed before
    its corresponding lock request returned. (CVE-2008-4307, Important)

  • a deficiency was found in the Linux kernel system call auditing
    implementation on 64-bit systems. This could allow a local, unprivileged
    user to circumvent a system call audit configuration, if that configuration
    filtered based on the “syscall” number or arguments.
    (CVE-2009-0834, Important)

  • Chris Evans reported a deficiency in the Linux kernel secure-computing
    implementation on 64-bit systems. This could allow a local, unprivileged
    user to bypass intended access restrictions, if those access restriction
    filters were based on the “syscall” number or arguments.
    (CVE-2009-0835, 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)

  • Chris Evans reported a deficiency in the Linux kernel signals
    implementation. The clone() system call permits the caller to indicate the
    signal it wants to receive when its child exits. When clone() is called
    with the CLONE_PARENT flag, it permits the caller to clone a new child that
    shares the same parent as itself, enabling the indicated signal to be sent
    to the caller’s parent (instead of the caller), even if the caller’s parent
    has different real and effective user IDs. This could lead to a denial of
    service of the parent. (CVE-2009-0028, Moderate)

  • an off-by-two error was found in the set_selection() function of the
    Linux kernel. This could allow a local, unprivileged user to cause a denial
    of service when making a selection of characters in a UTF-8 console. Note:
    physical console access is required to exploit this issue.
    (CVE-2009-1046, Low)

These updated packages also fix the following bug:

  • the __scsi_device_lookup_by_target() function was always returning the
    first matching device, regardless of the state of the device. This meant
    that any valid device listed after a deleted device would not be found. The
    __scsi_device_lookup_by_target() function was modified so that deleted
    devices are skipped, and valid devices are now found. (BZ#495976)

All Red Hat Enterprise MRG users should install this update, which resolves
these issues. For this update to take effect, the system must be rebooted.

Use Vulners API to create your own security tool

API usage cases
  • Network scanning
  • Linux Patch management
  • Threat protection
  • No network audit solution

Ways of integration

Integrate Vulners API

4.7 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

29.8%

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