USN-905-1: sudo vulnerabilities

Releases

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

Packages

• sudo -

Details

It was discovered that sudo did not properly validate the path for the
'sudoedit' pseudo-command. A local attacker could exploit this to execute
arbitrary code as root if sudo was configured to allow the attacker to use
sudoedit. The sudoedit pseudo-command is not used in the default
installation of Ubuntu. (CVE-2010-0426)

It was discovered that sudo did not reset group permissions when the
'runas_default' configuration option was used. A local attacker could
exploit this to escalate group privileges if sudo was configured to allow
the attacker to run commands under the runas_default account. The
runas_default configuration option is not used in the default installation
of Ubuntu. This issue affected Ubuntu 8.04 LTS, 8.10 and 9.04.
(CVE-2010-0427)

Update instructions

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

Ubuntu 9.10

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

Ubuntu 9.04

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

Ubuntu 8.10

• sudo-ldap - 1.6.9p17-1ubuntu2.2
• sudo - 1.6.9p17-1ubuntu2.2

Ubuntu 8.04

• sudo-ldap - 1.6.9p10-1ubuntu3.6
• sudo - 1.6.9p10-1ubuntu3.6

Ubuntu 6.06

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

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

References

• CVE-2010-0426
• CVE-2010-0427