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Debian: New sudo packages fix pathname validation race Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
Debian A local user who has been granted permission to run commands via sudo could run arbitrary commands as a privileged user due to a flaw in sudo's pathname validation. This bug only affects configurations which have restricted user configurations prior to an ALL directive in the configuration file.
- ------------------------------------------------------------------------
Debian Security Advisory DSA 735-2                   security@debian.org
http://www.debian.org/security/                            Michael Stone
July 07, 2005                         http://www.debian.org/security/faq
- ------------------------------------------------------------------------

Package        : sudo
Vulnerability  : pathname validation race
Problem type   : local
Debian-specific: no
CVE Id(s)      : CAN-2005-1993
Debian Bug     : 315115

A local user who has been granted permission to run commands via sudo
could run arbitrary commands as a privileged user due to a flaw in
sudo's pathname validation. This bug only affects configurations which
have restricted user configurations prior to an ALL directive in the
configuration file. A workaround is to move any ALL directives to the
beginning of the sudoers file; see the advisory at
http://www.sudo.ws/sudo/alerts/path_race.html for more information.

For the old stable Debian distribution (woody), this problem has been
fixed in version 1.6.6-1.3woody1.

For the current stable distribution (sarge), this problem has been fixed
in version 1.6.8p7-1.1sarge1.

For the unstable distribution, this problem has been fixed in version
1.6.8p9-1.

The only change since DSA 735-1 is the addition of certain architectures
which were not available in the original advisory.

We recommend that you upgrade your sudo 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 3.0 (woody)
- ------------------

  woody was released for alpha, arm, hppa, i386, ia64, m68k, mips,
  mipsel, powerpc, s390 and sparc. Packages for all but arm & ia64 were
  released in DSA 735-1.

  arm architecture (ARM)

    http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.3woody1_arm.deb
      Size/MD5 checksum:   140196 68a776aa70997915c4cd3b2513cfda9a

  ia64 architecture (Intel ia64)

    http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.3woody1_ia64.deb
      Size/MD5 checksum:   170186 a7f5941729ed3e865b3809225de8c950


Debian 3.1 (sarge)
- ------------------

  sarge was released for alpha, arm, hppa, i386, ia64, m68k, mips,
  mipsel, powerpc, s390 and sparc. Packages for all but arm were
  released in DSA 735-1.

  arm architecture (ARM)

    http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.1sarge1_arm.deb
      Size/MD5 checksum:   163476 870b7104140d4170b2bbc663d431c333


- -------------------------------------------------------------------------------
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
 
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