Description
ip_conntrack_ftp in the IPTables firewall for Linux 2.4 allows remote attackers to bypass access restrictions for an FTP server via a PORT command that lists an arbitrary IP address and port number, which is added to the RELATED table and allowed by the firewall.
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
- Linux Kernel 2.4 - IPTables FTP Stateful Inspection Arbitrary Filter Rule Insertion EDB-20765 · remote · Apr 16, 2001 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- RHSA-2001:084 vendor-advisory
- 20010416 Tempest Security Techonologies -- Adivsory #01/2001 -- Linux IPTables mailing-list
- RHSA-2001:052 vendor-advisory
- 2602 vdb-entry
- linux-netfilter-iptables(6390) vdb-entry
- MDKSA-2001:071 vendor-advisory