GLSA-201705-15 : sudo: Privilege escalation
Medium Nessus Plugin ID 100523
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-201705-15 (sudo: Privilege escalation)
Qualys discovered a vulnerability in sudo’s get_process_ttyname() for Linux, that via sudo_ttyname_scan() can be directed to use a user-controlled, arbitrary tty device during its traversal of “/dev”
by utilizing the world-writable /dev/shm.
For further information, please see the Qualys Security Advisory Impact :
A local attacker can pretend that his tty is any character device on the filesystem, and after two race conditions, an attacker can pretend that the controlled tty is any file on the filesystem allowing for privilege escalation Workaround :
There is no known workaround at this time.
SolutionAll sudo users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-admin/sudo-1.8.20_p1'