Stack-based buffer overflow in rsyslog - CVE-2011-3200

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing a long TAG in a legacy syslog message. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

How to mitigate CVE-2011-3200

Links to Public Exploits and PoC-codes

• Exploit #3616 - rsyslog Long Tag Off-By-Two DoS (July 29, 2020)

External References

• http://git.adiscon.com/?p=rsyslog.git;a=commit;h=1ca6cc236d1dabf1633238b873fb1c057e52f95e
• http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065837.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065941.html
• http://lists.opensuse.org/opensuse-updates/2011-09/msg00013.html
• http://secunia.com/advisories/45922
• http://secunia.com/advisories/46027
• http://securitytracker.com/id?1026000
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:134
• http://www.redhat.com/support/errata/RHSA-2011-1247.html
• http://www.rsyslog.com/potential-dos-with-malformed-tag/
• http://www.securityfocus.com/bid/49413
• https://bugzilla.redhat.com/show_bug.cgi?id=727644

Related Security Bulletins

• Stack-based buffer overflow in rsyslog.com rsyslog
• Stack-based buffer overflow in rsyslog (Alpine package)