CVE-2005-2409

nbsmtp < 0.99 - Remote Code Execution via Format String in Debug Mode

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2005-2409. PoCs published by CoKi.

AI-analyzed exploit summary This exploit leverages a format string vulnerability in nbSMTP v0.99 to achieve remote code execution. It crafts a malicious buffer with a return address and shellcode, then sets up a fake SMTP server to trigger the vulnerability and spawn a bind shell on port 5074.

Description

Format string vulnerability in util.c in nbsmtp 0.99 and earlier, while running in debug mode, allows remote attackers to execute arbitrary code via format string specifiers that are not properly handled in a syslog call.

Exploits (1)

exploitdb WORKING POC VERIFIED
by CoKi · cremotelinux
https://www.exploit-db.com/exploits/1138

This exploit leverages a format string vulnerability in nbSMTP v0.99 to achieve remote code execution. It crafts a malicious buffer with a return address and shellcode, then sets up a fake SMTP server to trigger the vulnerability and spawn a bind shell on port 5074.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: nbSMTP v0.99
No auth needed
Prerequisites: Network access to the target SMTP service · Target running a vulnerable version of nbSMTP
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/16324
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/21674
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/14441
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/16279

Scores

EPSS 0.0994
EPSS Percentile 95.0%

Details

Status published
Products (1)
nbsmtp/nbsmtp < 0.99
Published Aug 01, 2005
Tracked Since Feb 18, 2026