-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- Debian Security Advisory DSA 099-1 security@debian.org Debian -- Security Information Martin Schulze January 12th, 2002 - -------------------------------------------------------------------------- Package : XChat Vulnerability : IRC session hijacking Problem-Type : remote vulnerability Debian-specific: no zen-parse found a vulnerability in the XChat IRC client that allows an attacker to take over the users IRC session. It is possible to trick XChat IRC clients into sending arbitrary commands to the IRC server they are on, potentially allowing social engineering attacks, channel takeovers, and denial of service. This problem exists in versions 1.4.2 and 1.4.3. Later versions of XChat are vulnerable as well, but this behaviour is controlled by the configuration variable »percascii«, which defaults to 0. If it is set to 1 then the problem becomes apparent in 1.6/1.8 a swell. This problem has been fixed in upstream version 1.8.7 and in version 1.4.3-1 for the current stable Debian release (2.2) with a patch provided from the upstream author Peter Zelezny. We recommend that you upgrade your XChat packages immediately, since this problem is already actively being exploited. 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: MD5 checksum: 2c7c49888490bb3725b693c804ee28a1 MD5 checksum: 903b5af62d1eed07c49792fcc418504e MD5 checksum: 4ed068ca2c0b85a46d9f81bcea84c562 Architecture independent components: MD5 checksum: c51aa0e90c1c22f5b7c61bb32eb5d321 Alpha architecture: MD5 checksum: 8a2f53441f99204f9569a78aa026c898 MD5 checksum: 9b2e6bc648364e6567ed69778969c4f3 MD5 checksum: e64f8c53b2e54b561df23c4926f75077 ARM architecture: MD5 checksum: 8da559c3d75c5ea877a74683c760f90e MD5 checksum: 858a1f72d2f139f3bc851e408a5b9333 MD5 checksum: d974a4ba26e8002a2e75d53d14c58eea Intel ia32 architecture: MD5 checksum: 2eb90d6a77af6c2475a976d282d76377 MD5 checksum: 9701ca60219d4ac8981293763474f14c MD5 checksum: 1a45ebe67bd4b495cbbd9b9e1517239e Motorola 680x0 architecture: MD5 checksum: a9e8384085d77b48c69ff723abdc6a29 MD5 checksum: a456d58e8525bd5448da59889c965a97 MD5 checksum: cc1c74b5652fa87cb5d38ac7eadde8f4 PowerPC architecture: MD5 checksum: 4171d6a1318e439d206e9417828147a8 MD5 checksum: 31038ff5e73cfc63fbdde833e558a76f MD5 checksum: 82d55e1f358f3f12aef5b9d6e60cff87 Sun Sparc architecture: MD5 checksum: 21abbe3265af73e9e9cedc4128346d83 MD5 checksum: bac9c9c55443febdf27627294648fc46 MD5 checksum: 8d8abf1ac399c400920725d2f0651450 These files will probably be moved into the stable distribution on its next revision. - --------------------------------------------------------------------------------- For apt-get: deb debian stable/updates main For dpkg-ftp: dists/stable/updates/main Mailing list: debian-security-announce@lists.debian.org Package info: `apt-cache show' and https://packages.debian.org/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see The GNU Privacy Guard iD8DBQE8QCISW5ql+IAeqTIRAolsAJ9aC0/AGffm08yRDd/BLZJqyo3d4QCggZ5p W+BYOJJGoMAVXqb+hFiIABM=W7XN -----END PGP SIGNATURE-----