Description
Format string vulnerability in stunnel before 3.22 when used in client mode for (1) smtp, (2) pop, or (3) nntp allows remote malicious servers to execute arbitrary code.
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
- STunnel 3.x - Client Negotiation Protocol Format String EDB-21192 · remote · Dec 22, 2001 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://marc.info/?l=stunnel-users&m=100869449828705&w=2
- 3748 vdb-entry
- MDKSA-2002:004 vendor-advisory
- 20020102 Stunnel: Format String Bug update mailing-list
- stunnel-client-format-string(7741) vdb-entry
- http://stunnel.mirt.net/news.html
- RHSA-2002:002 vendor-advisory
- 20011227 Stunnel: Format String Bug in versions <3.22 mailing-list