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redhatRedHatRHSA-2009:0264
HistoryFeb 10, 2009 - 12:00 a.m.

(RHSA-2009:0264) Important: kernel security update

2009-02-1000:00:00
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25

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.949 High

EPSS

Percentile

99.1%

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

This update addresses the following security issues:

  • a memory leak in keyctl handling. A local user could use this flaw to
    deplete kernel memory, eventually leading to a denial of service.
    (CVE-2009-0031, Important)

  • a buffer overflow in the Linux kernel Partial Reliable Stream Control
    Transmission Protocol (PR-SCTP) implementation. This could, potentially,
    lead to a denial of service if a Forward-TSN chunk is received with a large
    stream ID. (CVE-2009-0065, Important)

  • a flaw when handling heavy network traffic on an SMP system with many
    cores. An attacker who could send a large amount of network traffic could
    create a denial of service. (CVE-2008-5713, Important)

  • the code for the HFS and HFS Plus (HFS+) file systems failed to properly
    handle corrupted data structures. This could, potentially, lead to a local
    denial of service. (CVE-2008-4933, CVE-2008-5025, Low)

  • a flaw was found in the HFS Plus (HFS+) file system implementation. This
    could, potentially, lead to a local denial of service when write operations
    are performed. (CVE-2008-4934, Low)

In addition, these updated packages fix the following bugs:

  • when using the nfsd daemon in a clustered setup, kernel panics appeared
    seemingly at random. These panics were caused by a race condition in
    the device-mapper mirror target.

  • the clock_gettime(CLOCK_THREAD_CPUTIME_ID, ) syscall returned a smaller
    timespec value than the result of previous clock_gettime() function
    execution, which resulted in a negative, and nonsensical, elapsed time value.

  • nfs_create_rpc_client was called with a “flavor” parameter which was
    usually ignored and ended up unconditionally creating the RPC client with
    an AUTH_UNIX flavor. This caused problems on AUTH_GSS mounts when the
    credentials needed to be refreshed. The credops did not match the
    authorization type, which resulted in the credops dereferencing an
    incorrect part of the AUTH_UNIX rpc_auth struct.

  • when copy_user_c terminated prematurely due to reading beyond the end of
    the user buffer and the kernel jumped to the exception table entry, the rsi
    register was not cleared. This resulted in exiting back to user code with
    garbage in the rsi register.

  • the hexdump data in s390dbf traces was incomplete. The length of the data
    traced was incorrect and the SAN payload was read from a different place
    then it was written to.

  • when using connected mode (CM) in IPoIB on ehca2 hardware, it was not
    possible to transmit any data.

  • when an application called fork() and pthread_create() many times and, at
    some point, a thread forked a child and then attempted to call the
    setpgid() function, then this function failed and returned and ESRCH error
    value.

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

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.949 High

EPSS

Percentile

99.1%