Synopsis

Important: kernel security update

Type/Severity

Security Advisory: Important

Topic

Updated kernel packages that fix a number of security issues are now
available for Red Hat Enterprise Linux 2.1 running on 32-bit architectures.

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.

These updated packages fix the following security issues:

• a flaw was found in the IPv4 forwarding base. This could allow a local,

unprivileged user to cause a denial of service. (CVE-2007-2172,
Important)

• a flaw was found in the handling of process death signals. This allowed a

local, unprivileged user to send arbitrary signals to the suid-process
executed by that user. Successful exploitation of this flaw depends on the
structure of the suid-program and its signal handling. (CVE-2007-3848,
Important)

• when accessing kernel memory locations, certain Linux kernel drivers

registering a fault handler did not perform required range checks. A local,
unprivileged user could use this flaw to gain read or write access to
arbitrary kernel memory, or possibly cause a denial of service.
(CVE-2008-0007, Important)

• a possible kernel memory leak was found in the Linux kernel Simple

Internet Transition (SIT) INET6 implementation. This could allow a local,
unprivileged user to cause a denial of service. (CVE-2008-2136, Important)

• missing capability checks were found in the SBNI WAN driver which could

allow a local, unprivileged user to bypass intended capability
restrictions. (CVE-2008-3525, Important)

• a flaw was found in the way files were written using truncate() or

ftruncate(). This could allow a local, unprivileged user to acquire the
privileges of a different group and obtain access to sensitive information.
(CVE-2008-4210, Important)

• a race condition in the mincore system core allowed a local, unprivileged

user to cause a denial of service. (CVE-2006-4814, Moderate)

• a flaw was found in the aacraid SCSI driver. This allowed a local,

unprivileged user to make ioctl calls to the driver which should otherwise
be restricted to privileged users. (CVE-2007-4308, Moderate)

• two buffer overflow flaws were found in the Integrated Services Digital

Network (ISDN) subsystem. A local, unprivileged user could use these flaws
to cause a denial of service. (CVE-2007-6063, CVE-2007-6151, Moderate)

• a flaw was found in the way core dump files were created. If a local,

unprivileged user could make a root-owned process dump a core file into a
user-writable directory, the user could gain read access to that core file,
potentially compromising sensitive information. (CVE-2007-6206, Moderate)

• a deficiency was found in the Linux kernel virtual file system (VFS)

implementation. This could allow a local, unprivileged user to attempt file
creation within deleted directories, possibly causing a denial of service.
(CVE-2008-3275, Moderate)

All users of Red Hat Enterprise Linux 2.1 on 32-bit architectures should
upgrade to these updated packages which address these vulnerabilities. For
this update to take effect, the system must be rebooted.

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/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 2 i386
• Red Hat Enterprise Linux Workstation 2 i386

Fixes

• BZ - 457858 - CVE-2008-3275 Linux kernel local filesystem DoS
• BZ - 446031 - CVE-2008-2136 kernel: sit memory leak
• BZ - 460401 - CVE-2008-3525 kernel: missing capability checks in sbni_ioctl()
• BZ - 463661 - CVE-2008-4210 kernel: open() call allows setgid bit when user is not in new file's group
• BZ - 250429 - CVE-2007-2172 fib_semantics.c out of bounds access vulnerability
• BZ - 252309 - CVE-2007-4308 kernel: Missing ioctl() permission checks in aacraid driver
• BZ - 250972 - CVE-2007-3848 Privilege escalation via PR_SET_PDEATHSIG
• BZ - 306971 - CVE-2006-4814 kernel Race condition in mincore can cause "ps -ef" to hang
• BZ - 392101 - CVE-2007-6063 Linux Kernel isdn_net_setcfg buffer overflow
• BZ - 396861 - CVE-2007-6206 Issue with core dump owner
• BZ - 425111 - CVE-2007-6151 I4L: fix isdn_ioctl memory issue
• BZ - 428961 - CVE-2008-0007 kernel: insufficient range checks in fault handlers with mremap

CVEs

• CVE-2008-3525
• CVE-2008-4210
• CVE-2008-3275
• CVE-2008-2136
• CVE-2008-0007
• CVE-2007-6151
• CVE-2007-6063
• CVE-2007-6206
• CVE-2007-3848
• CVE-2007-4308
• CVE-2007-2172
• CVE-2006-4814

References

(none)