4.9 - RHSA-2007:1049

Problem Description:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Desktop version 3 - i386, x86_64 Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem 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.

4. 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

5. Bug IDs fixed (http://bugzilla.redhat.com/):

249237 - IPV4 'Treason uncloaked' message - hints at a more general kernel/net bug 250429 - CVE-2007-2172 fib_semantics.c out of bounds access vulnerability 250972 - CVE-2007-3848 Privilege escalation via PR_SET_PDEATHSIG 252309 - CVE-2007-4308 Missing ioctl() permission checks in aacraid driver 289151 - CVE-2006-4538 Local DoS with corrupted ELF 294941 - CVE-2007-3739 LTC36188-Don't allow the stack to grow into hugetlb reserved regions