Heap-based buffer overflow in xchat - CVE-2011-5129

Detailed vulnerability description

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

The vulnerability exists due to a boundary error in Heap-based buffer overflow in XChat 2.8.9 and earlier. A remote attacker can use a long response string. 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.

How to mitigate CVE-2011-5129

Sources

• http://packetstormsecurity.org/files/107312/xchat-dos.txt
• http://www.exploit-db.com/exploits/18159
• http://www.osvdb.org/77629
• http://www.securityfocus.com/bid/50820
• http://www.securitytracker.com/id?1027468