SB2012092603 - Heap-based buffer overflow in rsyslog.com rsyslog

Description

This security bulletin contains information about 1 security vulnerability.

1) Heap-based buffer overflow (CVE-ID: CVE-2011-4623)

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

The vulnerability exists due to a boundary error in Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4, and 6.x before 6.1.4. A remote attacker can use a large file to trigger heap-based buffer overflow and execute arbitrary code on the target system.

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

Remediation

Install update from vendor's website.

References

• http://bugzilla.adiscon.com/show_bug.cgi?id=221
• http://git.adiscon.com/?p=rsyslog.git;a=commit;h=6bad782f154b7f838c7371bf99c13f6dc4ec4101
• http://rsyslog.com/changelog-for-4-6-6-v4-stable/
• http://rsyslog.com/changelog-for-5-7-4-v5-beta/
• http://rsyslog.com/changelog-for-6-1-4-devel/
• http://secunia.com/advisories/45848
• http://secunia.com/advisories/47698
• http://www.openwall.com/lists/oss-security/2011/12/22/2
• http://www.securityfocus.com/bid/51171
• http://www.securitytracker.com/id?1026556
• http://www.ubuntu.com/usn/USN-1338-1
• https://bugzilla.redhat.com/show_bug.cgi?id=769822