Description
The send_user_mode function in s_user.c in (1) Undernet ircu 2.10.12.12 and earlier, (2) snircd 1.3.4 and earlier, and unspecified other ircu derivatives allows remote attackers to cause a denial of service (daemon crash) via a malformed MODE command.
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
- Snircd 1.3.4 - 'send_user_mode' Denial of Service EDB-5306 · dos · Mar 24, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- undernet-ircu-sendusermode-dos(41401) vdb-entry
- 29486 third-party-advisory
- 20080324 ircu/snircd remote crash vulnerability mailing-list
- http://hg.quakenet.org/snircd/rev/2da2b881d9f5
- 20080324 ircu/snircd remote crash vulnerability mailing-list
- ADV-2008-0977 vdb-entry
- 1019687 vdb-entry
- 28413 vdb-entry
- 43613 vdb-entry
- 3779 third-party-advisory
- snircd-sendusermode-dos(41397) vdb-entry
- 5306 exploit
- 1019688 vdb-entry
- ADV-2008-0978 vdb-entry
- 29481 third-party-advisory