CVE-2003-0280

CMailServer 4.0.2003.03 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2003-0280. PoCs published by Dennis Rand.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in CMailServer's SMTP service by sending an overly long MAIL FROM header, causing a denial of service (DoS) and potentially allowing code execution as SYSTEM. The PoC uses a Perl script to connect to the SMTP service and send the malicious payload.

Description

Multiple buffer overflows in the SMTP Service for ESMTP CMailServer 4.0.2003.03.27 allow remote attackers to execute arbitrary code via long (1) MAIL FROM or (2) RCPT TO commands.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Dennis Rand · perldoswindows
https://www.exploit-db.com/exploits/22581

This exploit targets a buffer overflow vulnerability in CMailServer's SMTP service by sending an overly long MAIL FROM header, causing a denial of service (DoS) and potentially allowing code execution as SYSTEM. The PoC uses a Perl script to connect to the SMTP service and send the malicious payload.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: CMailServer 4.0.2003.03.27
No auth needed
Prerequisites: Network access to the target SMTP service (port 25)
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Dennis Rand · perldoswindows
https://www.exploit-db.com/exploits/22582

This exploit targets a buffer overflow vulnerability in CMailServer's SMTP service by sending an overly long RCPT TO header, causing a denial of service (DoS). The PoC demonstrates the crash but does not include the full payload for code execution.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: CMailServer 4.0.2003.03.27
No auth needed
Prerequisites: Network access to the SMTP service (port 25)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/7548
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/7547
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=105258772101349&w=2
Third Party Advisory mailing-list x_refsource_vulnwatch
http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0062.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/11975

Scores

EPSS 0.1475
EPSS Percentile 96.2%

Details

Status published
Products (1)
youngzsoft/cmailserver 4.0.2003.23.27
Published Jun 16, 2003
Tracked Since Feb 18, 2026