DSA 1202-1: New screen packages fix arbitrary code execution
Posted on: 10/31/2006 11:10 PM

The Debian Security Team published a new security update for Debian GNU/Linux. Here the announcement:

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Debian Security Advisory DSA 1202-1 security@debian.org
http://www.debian.org/security/ Moritz Muehlenhoff
October 31st, 2006 http://www.debian.org/security/faq
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Package : screen
Vulnerability : programming error
Problem-Type : local(remote)
Debian-specific: no
CVE ID : CVE-2006-4573
Debian Bug : 395225 395999

"cstone" and Rich Felker discovered that specially crafted UTF-8 sequences
may lead an out of bands memory write when displayed inside the screen
terminal multiplexer, allowing denial of service and potentially the
execution of arbitrary code.

For the stable distribution (sarge) this problem has been fixed in
version 4.0.2-4.1sarge1. Due to technical problems with the security
buildd infrastructure this update lacks a build for the Sun Sparc
architecture. It will be released as soon as the problems are resolved.

For the unstable distribution (sid) this problem has been fixed in
version 4.0.3-0.1.

We recommend that you upgrade your screen package.


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

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/s/screen/screen_4.0.2-4.1sarge1.dsc
Size/MD5 checksum: 636 e49dbc2f884aef5f5be87ee4e81c3d83
http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1.diff.gz
Size/MD5 checksum: 33782 659bf15bbbb31817ebad9372c8827618
http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2.orig.tar.gz
Size/MD5 checksum: 840519 ed68ea9b43d9fba0972cb017a24940a1

Alpha architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_alpha.deb
Size/MD5 checksum: 629958 ed0ff830958e515c4cfe7578c3cbd43b

AMD64 architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_amd64.deb
Size/MD5 checksum: 599552 c6b981d25812347be756677294dbb91e

ARM architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_arm.deb
Size/MD5 checksum: 588386 a6a0e9b44c193c70207977a0a850a33c

HP Precision architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_hppa.deb
Size/MD5 checksum: 605298 312f40458406384986d369c69fec651f

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_i386.deb
Size/MD5 checksum: 581822 0d04f818e84bba320ae7af77463a83f3

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_ia64.deb
Size/MD5 checksum: 682540 f1ffda25938b5e08e80ed581a24a0311

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_m68k.deb
Size/MD5 checksum: 560314 693600b1df1c4a87f281365a1102d780

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_mips.deb
Size/MD5 checksum: 603124 4eb62645164745cbb946539e0c11af7c

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_mipsel.deb
Size/MD5 checksum: 603336 8225a911fb5206aefafc8bd16813ce48

PowerPC architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_powerpc.deb
Size/MD5 checksum: 593248 8fab93a81f23a478171c8dab6b21bc78

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/s/screen/screen_4.0.2-4.1sarge1_s390.deb
Size/MD5 checksum: 597560 5bb4d6445f7e433f8adab4b33e9e51fc


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

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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show lt;pkggt;' and http://packages.debian.org/lt;pkggt;
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