Debian alert: man-db local exploit
-----BEGIN PGP SIGNED MESSAGE----- - ------------------------------------------------------------------------ Debian Security Advisory DSA-056-1 security@debian.org http://www.debian.org/security/ Wichert Akkerman May 8, 2001 - ------------------------------------------------------------------------ Package : man-db Problem type : local file overwrite Debian-specific: no Ethan Benson found a bug in man-db packages as distributed in Debian/GNU/Linux 2.2. man-db includes a mandb tool which is used to build an index of the manual pages installed on a system. When the -u or - -c option were given on the command-line to tell it to write its database to a different location it failed to properly drop privileges before creating a temporary file. This makes it possible for an attacked to do a standard symlink attack to trick mandb into overwriting any file that is writable by uid man, which includes the man and mandb binaries. This has been fixed in version 2.3.16-3, and we recommend that you upgrade your man-db package immediately. If you use suidmanager you can also use that to make sure man and mandb are not installed suid which protects you from this problem. This can be done with the following commands: suidregister /usr/lib/man-db/man root root 0755 suidregister /usr/lib/man-db/mandb root root 0755 Of course even when using suidmanager an upgrade is still strongly recommended. wget url will fetch the file for you dpkg -i file.deb will install the referenced file. Debian GNU/Linux 2.2 alias potato - --------------------------------- Potato was released for alpha, arm, i386, m68k, powerpc and sparc. Source archives: http://security.debian.org/dists/stable/updates/main/source/man-db_2.3.16-3.dsc MD5 checksum: 9b151e47acd5724d0a92b5ad7744d6ae http://security.debian.org/dists/stable/updates/main/source/man-db_2.3.16-3.tar.gz MD5 checksum: dab73666ef671d0bb4995c4ba653d2c3 Alpha architecture: http://security.debian.org/dists/stable/updates/main/binary-alpha/man-db_2.3.16-3_alpha.deb MD5 checksum: 0e075e4788b1dc1edfa35d4d21a48252 ARM architecture: http://security.debian.org/dists/stable/updates/main/binary-arm/man-db_2.3.16-3_arm.deb MD5 checksum: 3de307e54eafaf23dea1f8016bc0a2aa Intel ia32 architecture: http://security.debian.org/dists/stable/updates/main/binary-i386/man-db_2.3.16-3_i386.deb MD5 checksum: 434291472106de31c2f10dce3c725a3c Motorola 680x0 architecture: http://security.debian.org/dists/stable/updates/main/binary-m68k/man-db_2.3.16-3_m68k.deb MD5 checksum: 3025cc1e2303dca7ebf3e6df7a60a587 PowerPC architecture: http://security.debian.org/dists/stable/updates/main/binary-powerpc/man-db_2.3.16-3_powerpc.deb MD5 checksum: 880642cfed94f5f02d9212e940ba0c46 Sun Sparc architecture: http://security.debian.org/dists/stable/updates/main/binary-sparc/man-db_2.3.16-3_sparc.deb MD5 checksum: 4df2f927732b9f6d1a5e9b62b8ecb0ff These packages will be moved into the stable distribution on its next revision. For not yet released architectures please refer to the appropriate directory ftp://ftp.debian.org/debian/dists/sid/binary-$arch/ . - -- - ---------------------------------------------------------------------------- apt-get: deb http://security.debian.org/ stable/updates main dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- Version: 2.6.3ia Charset: noconv iQB1AwUBOvf6wKjZR/ntlUftAQFt6QMAhsfK5y21AvmrtvT9vThKr+bC2lSaSc/0 /jdYqqzaijS9GKleM7iDmGKFcyR+sU0Q5yJUfME/NIp2d279hAzzP76eoQHc1jh0 Y0jWNEIOblOm4g0J+TTGe/8YEjHjd3yq =MefB -----END PGP SIGNATURE----- |
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