Description
The mailguard feature in Cisco Secure PIX Firewall 5.2(2) and earlier does not properly restrict access to SMTP commands, which allows remote attackers to execute restricted commands by sending a DATA command before sending the restricted commands.
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
- Cisco PIX Firewall 4.x/5.x - SMTP Content Filtering Evasion EDB-20231 · remote · Sep 19, 2000 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 1698 vdb-entry
- cisco-pix-smtp-filtering(5277) vdb-entry
- 20001005 Cisco Secure PIX Firewall Mailguard Vulnerability vendor-advisory
- 20000920 Re: Cisco PIX Firewall (smtp content filtering hack) - Version 4.2(1) not exploitable mailing-list
- 20000919 Cisco PIX Firewall (smtp content filtering hack) mailing-list