CVE-2005-2841

Cisco IOS 12.2ZH, 12.2ZL, 12.3, 12.3T, 12.4, 12.4T - Buffer Overflow in Firewall Authentication Proxy

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2005-2841. PoCs published by Markus.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in Cisco IOS Firewall Authentication Proxy for FTP and Telnet protocols. It sends a crafted payload with a long string of 'A' characters to trigger the overflow, potentially causing a denial of service or arbitrary code execution.

Description

Buffer overflow in Firewall Authentication Proxy for FTP and/or Telnet Sessions for Cisco IOS 12.2ZH and 12.2ZL, 12.3 and 12.3T, and 12.4 and 12.4T allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted user authentication credentials.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Markus · textdoshardware
https://www.exploit-db.com/exploits/26233

This exploit targets a buffer overflow vulnerability in Cisco IOS Firewall Authentication Proxy for FTP and Telnet protocols. It sends a crafted payload with a long string of 'A' characters to trigger the overflow, potentially causing a denial of service or arbitrary code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Theoretical
Target: Cisco IOS Firewall Authentication Proxy
No auth needed
Prerequisites: Network access to the target device · FTP or Telnet service enabled on the target
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/236045
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5317
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2005/1669
Vendor Advisory vendor-advisory x_refsource_cisco
http://www.cisco.com/warp/public/707/cisco-sa-20050907-auth_proxy.shtml

Scores

EPSS 0.1412
EPSS Percentile 96.2%

Details

Status published
Products (6)
cisco/ios 12.2zh
cisco/ios 12.2zl
cisco/ios 12.3
cisco/ios 12.3t
cisco/ios 12.4
cisco/ios 12.4t
Published Sep 08, 2005
Tracked Since Feb 18, 2026