FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

sudo -- Flaw in Runas group matching

Affected packages
1.7.0 <= sudo <


VuXML ID 67b514c3-ba8f-11df-8f6e-000c29a67389
Discovery 2010-09-07
Entry 2010-09-07

Todd Miller reports:

Beginning with sudo version 1.7.0 it has been possible to grant permission to run a command using a specified group via sudo -g option (run as group). A flaw exists in the logic that matches Runas groups in the sudoers file when the -u option is also specified (run as user). This flaw results in a positive match for the user specified via -u so long as the group specified via -g is allowed by the sudoers file.

Exploitation of the flaw requires that Sudo be configured with sudoers entries that contain a Runas group. Entries that do not contain a Runas group, or only contain a Runas user are not affected.


CVE Name CVE-2010-2956