Atrium Software Mercur 3.30 SMTP Command EXPN memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Atrium Software Mercur 3.30. This affects an unknown part of the component SMTP Command Handler. This manipulation of the argument EXPN causes memory corruption. This vulnerability is registered as CVE-2001-0280. Furthermore, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Atrium Software Mercur 3.30 and classified as critical. Affected by this vulnerability is some unknown processing of the component SMTP Command Handler. The manipulation of the argument EXPN with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in MERCUR SMTP server 3.30 allows remote attackers to execute arbitrary commands via a long EXPN command.

The weakness was published 02/23/2001 by Martin Rakhmanoff as not defined posting (Bugtraq). The advisory is shared at archives.neohapsis.com. This vulnerability is known as CVE-2001-0280. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed in ANSI C and been published immediately after the advisory. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 10620 (MERCUR SMTP Server EXPN Command Remote Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SMTP problems and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 50025 (Atrium Software Mercur Mail Server 3.3 EXPN Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (6149), Exploit-DB (20647), Tenable (10620), SecurityFocus (BID 2412†) and OSVDB (6027†). Similar entry is available at VDB-88832. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 10620
Nessus Name: MERCUR SMTP Server EXPN Command Remote Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

02/23/2001 🔍
02/23/2001 +0 days 🔍
02/23/2001 +0 days 🔍
02/23/2001 +0 days 🔍
02/26/2001 +2 days 🔍
05/03/2001 +66 days 🔍
02/10/2004 +1013 days 🔍
04/09/2004 +58 days 🔍
07/03/2014 +3737 days 🔍
10/07/2025 +4114 days 🔍

Sourcesinfo

Advisory: archives.neohapsis.com
Researcher: Martin Rakhmanoff
Status: Confirmed

CVE: CVE-2001-0280 (🔍)
GCVE (CVE): GCVE-0-2001-0280
GCVE (VulDB): GCVE-100-16645
X-Force: 6149 - MERCUR Mailserver EXPN buffer overflow
SecurityFocus: 2412 - Atrium Software Mercur Mail Server 3.3 EXPN Buffer Overflow Vulnerability
OSVDB: 6027 - MERCUR SMTP Server EXPN Command Remote Overflow
Vulnerability Center: 3687 - Buffer Overflow in MERCUR SMTP Server 3.30, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 07/03/2014 17:35
Updated: 10/07/2025 14:24
Changes: 07/03/2014 17:35 (76), 05/19/2019 16:40 (4), 03/03/2025 00:09 (18), 10/07/2025 14:24 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!