Description
Non-registered IRC users using (1) ircd-hybrid 7.0.1 and earlier, (2) ircd-ratbox 1.5.1 and earlier, or (3) ircd-ratbox 2.0rc6 and earlier do not have a rate-limit imposed, which could allow remote attackers to cause a denial of service by repeatedly making requests, which are slowly dequeued.
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
- ircd-hybrid 7.0.1 / ircd-ratbox 1.5.1/2.0 - Socket Dequeuing Denial of Service EDB-24222 · dos · Jun 19, 2004 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- ircd-parseclientqueued-dos(16457) vdb-entry
- 10572 vdb-entry
- 20040618 ircd-hybrid-7 / ircd-ratbox low-bandwidth DoS mailing-list