DSA 1011-1: New kernel-patch-vserver packages fix root exploit

A kernel-patch-vserver packages are available for Debian GNU/Linux
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Debian Security Advisory DSA 1011-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
March 21st, 2005 http://www.debian.org/security/faq
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Package : kernel-patch-vserver, util-vserver
Vulnerability : missing attribute support
Problem type : local (remote)
Debian-specific: yes
CVE IDs : CVE-2005-4347 CVE-2005-4418
Debian Bugs : 329087 329090

Several vulnerabilities have been discovered in the Debian vserver
support for Linux. The Common Vulnerabilities and Exposures project
identifies the following problems:

CVE-2005-4347

Bjørn Steinbrink discovered that the chroot barrier is not set
correctly with util-vserver which may result in unauthorised
escapes from a vserver to the host system.

This vulnerability is limited to the 2.4 kernel patch included in
kernel-patch-vserver. The correction to this problem requires
updating the util-vserver package as well and installing a new
kernel built from the updated kernel-patch-vserver package.

CVE-2005-4418

The default policy of util-vserver is set to trust all unknown
capabilities instead of considering them as insecure.

The old stable distribution (woody) does not contain a
kernel-patch-vserver package.

For the stable distribution (sarge) this problem has been fixed in
version 1.9.5.5 of kernel-patch-vserver and in version
0.30.204-5sarge3 of util-vserver.

For the unstable distribution (sid) this problem has been fixed in
version 2.3 of kernel-patch-vserver and in version 0.30.208-1 of
util-vserver.

We recommend that you upgrade your util-vserver and
kernel-patch-vserver packages and build a new kernel immediately.


Upgrade Instructions
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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

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


Debian GNU/Linux 3.1 alias sarge
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Source archives:

http://security.debian.org/pool/updates/main/k/kernel-patch-vserver/kernel-patch-vserver_1.9.5.5.dsc
Size/MD5 checksum: 637 415731be72a9cd966e2fdb5d4f408c4a
http://security.debian.org/pool/updates/main/k/kernel-patch-vserver/kernel-patch-vserver_1.9.5.5.tar.gz
Size/MD5 checksum: 950447 fe6b34612095d2fbdbaab5aefbd83264

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3.dsc
Size/MD5 checksum: 752 e32069a5ca2ef2bc87794cd6c2160821
http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3.diff.gz
Size/MD5 checksum: 115947 d0bb2cd998a73905189ee24b5f46dd0d
http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204.orig.tar.gz
Size/MD5 checksum: 677831 b315f375b1cef48da1b644dec18f22bd

Architecture independent components:

http://security.debian.org/pool/updates/main/k/kernel-patch-vserver/kernel-patch-vserver_1.9.5.5_all.deb
Size/MD5 checksum: 436934 b50048ea819d150d660ed96e3988613b

Alpha architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_alpha.deb
Size/MD5 checksum: 600660 e52fe0ff93e4c9ca7d58fe8386ebab5a

AMD64 architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_amd64.deb
Size/MD5 checksum: 429530 c4155982844c085b7d9bc59d7eaa02c4

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_i386.deb
Size/MD5 checksum: 398794 56831faa6fa6d76c601fee78251f50eb

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_ia64.deb
Size/MD5 checksum: 640332 ab2b2e4283ca5b62c9d9cf5776b6dadb

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_mips.deb
Size/MD5 checksum: 612918 e4a60532f25ce776880261de79278e85

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_mipsel.deb
Size/MD5 checksum: 614152 f3aee29aad2682878f8ed22064f3fafa

PowerPC architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_powerpc.deb
Size/MD5 checksum: 425444 9a7542249c2b70661abab2afd5270462

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_s390.deb
Size/MD5 checksum: 440880 376560971a0d2db4bfd51beb67d42bff

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_sparc.deb
Size/MD5 checksum: 395640 51e24ac4754b1aa41277378ee9271a1f


These files will probably be moved into the stable distribution on
its next update.