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redhatRedHatRHSA-2009:1635
HistoryDec 03, 2009 - 12:00 a.m.

(RHSA-2009:1635) Important: kernel-rt security, bug fix, and enhancement update

2009-12-0300:00:00
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52

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.003 Low

EPSS

Percentile

69.6%

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

These updated packages fix the following security issues:

  • a NULL pointer dereference flaw was found in the NFSv4 implementation in
    the Linux kernel. Several of the NFSv4 file locking functions failed to
    check whether a file had been opened on the server before performing
    locking operations on it. A local user on a system with an NFSv4 share
    mounted could possibly use this flaw to cause a denial of service or
    escalate their privileges. (CVE-2009-3726, Important)

  • permission issues were found in the megaraid_sas driver (for SAS based
    RAID controllers) in the Linux kernel. The “dbg_lvl” and “poll_mode_io”
    files on the sysfs file system (“/sys/”) had world-writable permissions.
    This could allow local, unprivileged users to change the behavior of the
    driver. (CVE-2009-3889, CVE-2009-3939, Moderate)

These updated packages also fix the following bugs:

  • a problem existed with the i5000_edac driver under some topologies. In
    some cases, this driver failed to export memory devices via sysfs,
    preventing the ibm-prtm service from starting. With this update, the memory
    devices are accessible, allowing the ibm-prtm service to start, and
    therefore perform SMI remediation as expected. (BZ#527421)

  • the “/proc/sys/vm/mmap_min_addr” tunable helps prevent unprivileged
    users from creating new memory mappings below the minimum address. The
    sysctl value for mmap_min_addr could be changed by a process or user that
    has an effective user ID (euid) of 0, even if the process or user does not
    have the CAP_SYS_RAWIO capability. This update adds a capability check for
    the CAP_SYS_RAWIO capability before allowing the mmap_min_addr value to be
    changed. (BZ#534019)

As well, these updated packages add the following enhancements:

  • the Intel ixgbe driver was updated to upstream version 2.0.16-k2.
    (BZ#537505)

  • the InfiniBand OFED driver was updated to upstream version 1.4.1.
    (BZ#537500)

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

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.003 Low

EPSS

Percentile

69.6%