Description
freeSSHd 1.2 and earlier allows remote attackers to cause a denial of service (crash) via a SSH2_MSG_NEWKEYS packet to TCP port 22, which triggers a NULL pointer dereference.
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
- freeSSHd 1.2 - 'SSH2_MSG_NEWKEYS' Remote Denial of Service EDB-31218 · dos · Feb 17, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 29002 third-party-advisory
- ADV-2008-0591 vdb-entry
- 20080219 NULL pointer crash in freeSSHd 1.20 mailing-list
- http://aluigi.altervista.org/adv/freesshdnull-adv.txt
- 27845 vdb-entry