From: [email protected]

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Debian Security Advisory DSA-1687-1 [email protected] http://www.debian.org/security/ dann frazier
Dec 15, 2008 http://www.debian.org/security/faq
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Package : linux-2.6
Vulnerability : denial of service/privilege escalation
Problem type : local/remote
Debian-specific: no
CVE Id(s) : CVE-2008-3527 CVE-2008-3528 CVE-2008-4554 CVE-2008-4576
CVE-2008-4933 CVE-2008-4934 CVE-2008-5025 CVE-2008-5029
CVE-2008-5079 CVE_2008-5182 CVE-2008-5300

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following
problems:

CVE-2008-3527

Tavis Ormandy reported a local DoS and potential privilege
escalation in the Virtual Dynamic Shared Objects (vDSO)
implementation.

CVE-2008-3528

Eugene Teo reported a local DoS issue in the ext2 and ext3
filesystems. Local users who have been granted the privileges
necessary to mount a filesystem would be able to craft a corrupted
filesystem that causes the kernel to output error messages in an
infinite loop.

CVE-2008-4554

Milos Szeredi reported that the usage of splice() on files opened
with O_APPEND allows users to write to the file at arbitrary
offsets, enabling a bypass of possible assumed semantics of the
O_APPEND flag.

CVE-2008-4576

Vlad Yasevich reported an issue in the SCTP subsystem that may
allow remote users to cause a local DoS by triggering a kernel
oops.

CVE-2008-4933

Eric Sesterhenn reported a local DoS issue in the hfsplus
filesystem. Local users who have been granted the privileges
necessary to mount a filesystem would be able to craft a corrupted
filesystem that causes the kernel to overrun a buffer, resulting
in a system oops or memory corruption.

CVE-2008-4934

Eric Sesterhenn reported a local DoS issue in the hfsplus
filesystem. Local users who have been granted the privileges
necessary to mount a filesystem would be able to craft a corrupted
filesystem that results in a kernel oops due to an unchecked
return value.

CVE-2008-5025

Eric Sesterhenn reported a local DoS issue in the hfs filesystem.
Local users who have been granted the privileges necessary to
mount a filesystem would be able to craft a filesystem with a
corrupted catalog name length, resulting in a system oops or
memory corruption.

CVE-2008-5029

Andrea Bittau reported a DoS issue in the unix socket subsystem
that allows a local user to cause memory corruption, resulting in
a kernel panic.

CVE-2008-5079

Hugo Dias reported a DoS condition in the ATM subsystem that can
be triggered by a local user by calling the svc_listen function
twice on the same socket and reading /proc/net/atm/*vc.

CVE_2008-5182

Al Viro reported race conditions in the inotify subsystem that may
allow local users to acquire elevated privileges.

CVE-2008-5300

Dann Frazier reported a DoS condition that allows local users to
cause the out of memory handler to kill off privileged processes
or trigger soft lockups due to a starvation issue in the unix
socket subsystem.

For the stable distribution (etch), this problem has been fixed in
version 2.6.18.dfsg.1-23etch1.

We recommend that you upgrade your linux-2.6, fai-kernels, and
user-mode-linux packages.

Note: Debian 'etch' includes linux kernel packages based upon both the
2.6.18 and 2.6.24 linux releases. All known security issues are
carefully tracked against both packages and both packages will receive
security updates until security support for Debian 'etch'
concludes. However, given the high frequency at which low-severity
security issues are discovered in the kernel and the resource
requirements of doing an update, lower severity 2.6.18 and 2.6.24
updates will typically release in a staggered or "leap-frog" fashion.

Upgrade instructions
- --------------------

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

The following matrix lists additional source packages that were rebuilt for compatability with or to take advantage of this update:

Debian 4.0 (etch)
fai-kernels 1.17+etch.23etch1
user-mode-linux 2.6.18-1um-2etch.23etch1

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 4.0 alias etch
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Stable updates are available for alpha, amd64, arm, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc.

Source archives:

http://security.debian.org/pool/updates/main/u/user-mode-linux/user-mode-linux_2.6.18-1um-2etch.23etch1.diff.gz
Size/MD5 checksum: 19360 f0384a843ffc8952cbff2e25fe627a6b
http://security.debian.org/pool/updates/main/l/linux-2.6/linux-2.6_2.6.18.dfsg.1-23etch1.diff.gz
Size/MD5 checksum: 5413401 4a10af0cabdc8530b9c0d72891db9a42
http://security.debian.org/pool/updates/main/u/user-mode-linux/user-mode-linux_2.6.18-1um.orig.tar.gz
Size/MD5 checksum: 14435 4d10c30313e11a24621f7218c31f3582
http://security.debian.org/pool/updates/main/l/linux-2.6/linux-2.6_2.6.18.dfsg.1.orig.tar.gz
Size/MD5 checksum: 52225460 6a1ab0948d6b5b453ea0fce0fcc29060
http://security.debian.org/pool/updates/main/f/fai-kernels/fai-kernels_1.17+etch.23etch1.tar.gz
Size/MD5 checksum: 57771 c453400f733526582aa19eec52109711

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