RHSA-2007:0099 - Security Advisory

Topic

Updated kernel packages that fix security issues and bugs 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.

Description

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

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

• a flaw in the key serial number collision avoidance algorithm of the

keyctl subsystem that allowed a local user to cause a denial of service
(CVE-2007-0006, Important)

• a flaw in the Omnikey CardMan 4040 driver that allowed a local user to

execute arbitrary code with kernel privileges. In order to exploit this
issue, the Omnikey CardMan 4040 PCMCIA card must be present and the local
user must have access rights to the character device created by the driver.
(CVE-2007-0005, Moderate)

• a flaw in the core-dump handling that allowed a local user to create core

dumps from unreadable binaries via PT_INTERP. (CVE-2007-0958, Low)

In addition to the security issues described above, a fix for a kernel
panic in the powernow-k8 module, and a fix for a kernel panic when booting
the Xen domain-0 on system with large memory installations have been included.

Red Hat would like to thank Daniel Roethlisberger for reporting an issue
fixed in this erratum.

Red Hat Enterprise Linux 5 users are advised to upgrade their kernels to
the packages associated with their machine architecture and configurations
as listed in this erratum.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 229883 - CVE-2007-0006 Key serial number collision problem
• BZ - 229884 - CVE-2007-0005 Buffer Overflow in Omnikey CardMan 4040 cmx driver
• BZ - 229885 - CVE-2007-0958 core-dumping unreadable binaries via PT_INTERP

CVEs

• CVE-2007-0006
• CVE-2007-0958
• CVE-2007-0005

References

• http://www.redhat.com/security/updates/classification/#important