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Home » Hacking News » DSA 108-1: wmtv symlink vulnerability

DSA 108-1: wmtv symlink vulnerability

by Nikola Strahija on February 8th, 2002 Nicolas Boullis found some security problems in the wmtv package (a dockable video4linux TV player for windowmaker) which is distributed in Debian GNU/Linux 2.2. With the current version of wmtv, the configuration file is written back as the superuser, and without any further checks. A mailicious user might use that to damage important files.


This problem has been fixed in version 0.6.5-2potato2 for the stable
distribution by dropping privileges as soon as possible and only
regaining them where required. In the current testing/unstable
distribution this problem has been fixed in version 0.6.5-9 and above
by not requiring privileges anymore. Both contain fixes for two
potential buffer overflows as well.

We recommend that you upgrade your wmtv packages immediately.

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 2.2 alias potato
- ------------------------------------

Source archives:

http://security.debian.org/dists/stable/updates/main/source/wmtv_0.6.5-2potato2.diff.gz
MD5 checksum: 33e5ccb012755758b20cc014a362db8f
http://security.debian.org/dists/stable/updates/main/source/wmtv_0.6.5-2potato2.dsc
MD5 checksum: d1086d9ee3155e7dafd8d1bb2334742c
http://security.debian.org/dists/stable/updates/main/source/wmtv_0.6.5.orig.tar.gz
MD5 checksum: 2ee18b3f1261137e8772d4f6a9dd0031

Alpha architecture:

http://security.debian.org/dists/stable/updates/main/binary-alpha/wmtv_0.6.5-2potato2_alpha.deb
MD5 checksum: e4e55589bbb231cafd052899343e1cc6

ARM architecture:

http://security.debian.org/dists/stable/updates/main/binary-arm/wmtv_0.6.5-2potato2_arm.deb
MD5 checksum: 31f364c2dd72ca189d51193a03dfa7e3

Intel ia32 architecture:

http://security.debian.org/dists/stable/updates/main/binary-i386/wmtv_0.6.5-2potato2_i386.deb
MD5 checksum: 270d8553f9d732d612154dd0927ceece

Motorola 680x0 architecture:

http://security.debian.org/dists/stable/updates/main/binary-m68k/wmtv_0.6.5-2potato2_m68k.deb
MD5 checksum: d817e116e1d2742f4a3b28676c4ab9b6

PowerPC architecture:

http://security.debian.org/dists/stable/updates/main/binary-powerpc/wmtv_0.6.5-2potato2_powerpc.deb
MD5 checksum: dd5dd5a3bc6b8eb01a23cefd4958673d

Sun Sparc architecture:

http://security.debian.org/dists/stable/updates/main/binary-sparc/wmtv_0.6.5-2potato2_sparc.deb
MD5 checksum: f3aee2e9b28f6756ff518394411b0c13

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

- ---------------------------------------------------------------------------------
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: [email protected]
Package info: `apt-cache show ' and http://packages.debian.org/


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