CVE-2004-2375

1st Class Mail Server 4.0 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2004-2375. PoCs published by JeFFOsZ.

AI-analyzed exploit summary This exploit demonstrates a remote buffer overflow in 1st Class Mail Server via an overly long APOP command. The PoC provides a template for crafting a malicious payload to corrupt the instruction pointer, potentially leading to arbitrary code execution.

Description

Buffer overflow in the POP3 server in 1st Class Mail Server 4.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an APOP USER command with a long second parameter (digest).

Exploits (1)

exploitdb WORKING POC VERIFIED
by JeFFOsZ · textdosmultiple
https://www.exploit-db.com/exploits/23787

This exploit demonstrates a remote buffer overflow in 1st Class Mail Server via an overly long APOP command. The PoC provides a template for crafting a malicious payload to corrupt the instruction pointer, potentially leading to arbitrary code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Theoretical
Target: 1st Class Mail Server
No auth needed
Prerequisites: Network access to the target server · 1st Class Mail Server running with APOP enabled
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (7)

Core 7
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/4129
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1009279
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/15314
Exploit, Vendor Advisory x_refsource_misc
http://www.digiti.be/jeffosz/advisories/1stclasspop3.txt
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/9794
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/11029
Exploit, Vendor Advisory x_refsource_misc
http://www.zone-h.org/advisories/read/id=4047

Scores

EPSS 0.0586
EPSS Percentile 92.3%

Details

Status published
Products (1)
1st_class_internet_solutions/1st_class_mail_server 4.0
Published Dec 31, 2004
Tracked Since Feb 18, 2026