Description
Integer overflow in eXtremail 2.1.1 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary code, via a long USER command containing "%s" sequences to the pop3 port (110/tcp), which are expanded to "%%s" before being used in the memmove function, possibly due to an incomplete fix for CVE-2001-1078.
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 4
- eXtremail 2.1.1 - 'memmove()' Remote Denial of Service EDB-4532 · dos · Oct 15, 2007 · verified
- eXtremail 2.1.1 - 'LOGIN' Remote Stack Overflow EDB-4533 · remote · Oct 15, 2007 · verified
- eXtremail 2.1.1 - PLAIN Authentication Remote Stack Overflow EDB-4534 · remote · Oct 15, 2007 · verified
- eXtremail 2.1.1 - Remote Heap Overflow (PoC) EDB-4535 · dos · Oct 15, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 27220 third-party-advisory
- http://www.digit-labs.org/files/exploits/extremail-v3.pl
- 26074 vdb-entry
- 4532 exploit
- 20071015 eXtremail(ly easy) remote roots mailing-list