USN-905-1: sudo vulnerabilities
Ubuntu Security Notice USN-905-1
26th February, 2010
sudo vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.10
- Ubuntu 9.04
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS
Software description
- 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 version:
- 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 LTS:
- sudo-ldap 1.6.9p10-1ubuntu3.6
- sudo 1.6.9p10-1ubuntu3.6
- Ubuntu 6.06 LTS:
- sudo-ldap 1.6.8p12-1ubuntu6.1
- sudo 1.6.8p12-1ubuntu6.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.