Description
XChat 1.8.7 and earlier, including default configurations of 1.4.2 and 1.4.3, allows remote attackers to execute arbitrary IRC commands as other clients via encoded characters in a PRIVMSG command that calls CTCP PING, which expands the characters in the client response when the percascii variable is set.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- X-Chat 1.x - CTCP Ping Remote IRC Command Execution EDB-21210 · remote · Jan 9, 2002 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- xchat-ctcp-ping-command(7856) vdb-entry
- CLA-2002:453 vendor-advisory
- RHSA-2002:005 vendor-advisory
- HPSBTL0201-016 vendor-advisory
- 3830 vdb-entry
- 20020109 xchat IRC session hijacking vulnerability (versions 1.4.1, 1.4.2) mailing-list
- DSA-099 vendor-advisory