USN-928-1: Sudo vulnerability

Releases

• Ubuntu 9.10
• Ubuntu 9.04
• Ubuntu 8.10
• Ubuntu 8.04
• Ubuntu 6.06

Packages

• sudo -

Details

Valerio Costamagna discovered that sudo did not properly validate the path
for the 'sudoedit' pseudo-command when the PATH contained only a dot ('.').
If secure_path and ignore_dot were disabled, a local attacker could exploit
this to execute arbitrary code as root if sudo was configured to allow the
attacker to use sudoedit. By default, secure_path is used and the sudoedit
pseudo-command is not used in Ubuntu. This is a different but related issue
to CVE-2010-0426.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.10

• sudo-ldap - 1.7.0-1ubuntu2.2
• sudo - 1.7.0-1ubuntu2.2

Ubuntu 9.04

• sudo-ldap - 1.6.9p17-1ubuntu3.2
• sudo - 1.6.9p17-1ubuntu3.2

Ubuntu 8.10

• sudo-ldap - 1.6.9p17-1ubuntu2.3
• sudo - 1.6.9p17-1ubuntu2.3

Ubuntu 8.04

• sudo-ldap - 1.6.9p10-1ubuntu3.7
• sudo - 1.6.9p10-1ubuntu3.7

Ubuntu 6.06

• sudo-ldap - 1.6.8p12-1ubuntu6.2
• sudo - 1.6.8p12-1ubuntu6.2

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

• https://launchpad.net/bugs/563963