Issued:

2007-12-03

Updated:

2007-12-03

RHSA-2007:1049 - Important: kernel security and bug fix update

Synopsis

Important: kernel security and bug fix update

Type/Severity

Security Advisory Important

Topic

Updated kernel packages that fix several security issues and a bug in the Red Hat Enterprise Linux 3 kernel are now available.

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

Description

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

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 IPv4 forwarding base. This allowed a local user to cause a denial of service. (CVE-2007-2172, Important)

A flaw was found where a corrupted executable file could cause cross-region memory mappings on Itanium systems. This allowed a local user to cause a denial of service. (CVE-2006-4538, 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 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)

As well, these updated packages fix the following bug:

• a bug in the TCP header prediction code may have caused "TCP: Treason uncloaked!" messages to be logged. In certain situations this may have lead to TCP connections hanging or aborting.

Red Hat Enterprise Linux 3 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

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 This content is not included.http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

Updated Packages

• kernel-unsupported-2.4.21-53.EL.ppc64pseries.rpm
• kernel-unsupported-2.4.21-53.EL.ppc64iseries.rpm
• kernel-2.4.21-53.EL.ppc64pseries.rpm
• kernel-2.4.21-53.EL.ppc64iseries.rpm
• kernel-doc-2.4.21-53.EL.ppc64.rpm
• kernel-source-2.4.21-53.EL.ppc64.rpm

Fixes

• This content is not included.BZ - 249237
• This content is not included.BZ - 250429
• This content is not included.BZ - 250972
• This content is not included.BZ - 252309
• This content is not included.BZ - 289151
• This content is not included.BZ - 294941

CVEs

• CVE-2006-4538
• CVE-2007-2172
• CVE-2007-3739
• CVE-2007-4308
• CVE-2007-3848

References

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

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.