Permissions, Privileges, and Access Controls in tmux - CVE-2011-1496

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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.

Affected software

How to mitigate CVE-2011-1496

Links to Public Exploits and PoC-codes

• Exploit #4403 - tmux 1.3/1.4 - '-S' Option Incorrect SetGID Privilege Escalation (August 11, 2020)

External References

• http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058367.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058452.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058548.html
• http://secunia.com/advisories/44081
• http://secunia.com/advisories/44239
• http://www.debian.org/security/2011/dsa-2212
• http://www.exploit-db.com/exploits/17147
• http://www.securityfocus.com/bid/47283
• http://www.vupen.com/english/advisories/2011/0897
• http://www.vupen.com/english/advisories/2011/1002
• http://www.vupen.com/english/advisories/2011/1015
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66693

Related Security Bulletins

• Permissions, Privileges, and Access Controls in tmux
• Fedora EPEL 6 update for tmux
• Fedora EPEL 5 update for tmux