Seattle Lab SLMail Server 3.0.2421 Command VRFY/EXPN memory corruption

CVSS Meta Temp Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Seattle Lab SLMail Server 3.0.2421. The impacted element is an unknown function of the component Command Handler. Such manipulation of the argument VRFY/EXPN leads to memory corruption. This vulnerability is uniquely identified as CVE-2001-0280. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Seattle Lab SLMail Server 3.0.2421 (Mail Server Software). Affected by this issue is some unknown functionality of the component Command Handler. The manipulation of the argument VRFY/EXPN with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The weakness was disclosed 02/04/1999 by Martin Rakhmanoff with eEye (Website). The advisory is shared for download at archives.neohapsis.com. This vulnerability is handled as CVE-2001-0280. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

After 3 years, there has been an exploit disclosed. The exploit is available at exploit-db.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. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1056.

The vulnerability is also documented in the databases at X-Force (6149), Exploit-DB (20647), Tenable (10620), SecurityFocus (BID 223†) and OSVDB (6027†). The entry VDB-16645 is pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

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

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Price Prediction: 🔍
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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: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍
TippingPoint: 🔍

Timelineinfo

02/04/1999 🔍
02/04/1999 +0 days 🔍
02/04/1999 +0 days 🔍
02/23/2001 +750 days 🔍
02/26/2001 +2 days 🔍
05/03/2001 +66 days 🔍
11/23/2003 +934 days 🔍
04/09/2004 +137 days 🔍
07/10/2016 +4475 days 🔍
10/07/2025 +3376 days 🔍

Sourcesinfo

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

CVE: CVE-2001-0280 (🔍)
GCVE (CVE): GCVE-0-2001-0280
GCVE (VulDB): GCVE-100-88832
X-Force: 6149
SecurityFocus: 223 - SLMail VRFY and EXPN Buffer Overflow Vulnerabilities
OSVDB: 6027 - MERCUR SMTP Server EXPN Command Remote Overflow
Vulnerability Center: 2900 - The SLMail Server Crashed Upon Receival of a Long Argument to the VRFY or EXPN Command, Medium

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

Entryinfo

Created: 07/10/2016 16:50
Updated: 10/07/2025 14:24
Changes: 07/10/2016 16:50 (70), 02/20/2019 15:58 (5), 03/03/2025 01:05 (27), 10/07/2025 14:24 (2)
Complete: 🔍
Cache ID: 216::103

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