tmux 1.3 and 1.4 does not properly drop group privileges, which allows local users to gain utmp group privileges via a filename to the -S command-line option.

tmux 1.3 and 1.4 does not properly drop group privileges, which allows local users to gain utmp group privileges via a filename to the -S command-line option.

tmux 1.3 and 1.4 does not properly drop group privileges, which allows local users to gain utmp group privileges via a filename to the -S command-line option. Local attackers may exploit this issue to gain elevated privileges; other attacks may also be possible. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

- ------------------------------------------------------------------------- Debian Security Advisory DSA-2212-1 security@debian.org http://www.debian.org/security/ Nico Golde April 7, 2011 http://www.debian.org/security/faq - -------------------------------------------------------------------------

Package : tmux Vulnerability : privilege escalation Problem type : local Debian-specific: yes CVE ID : CVE-2011-1496 Debian bug : 620304

Daniel Danner discovered that tmux, a terminal multiplexer, is not properly dropping group privileges.

The oldstable distribution (lenny) is not affected by this problem, it does not include tmux.

For the stable distribution (squeeze), this problem has been fixed in version 1.3-2+squeeze1.

For the testing distribution (wheezy), this problem has been fixed in version 1.4-6.

For the testing distribution (sid), this problem has been fixed in version 1.4-6.

We recommend that you upgrade your tmux packages.

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can…