Computalynx CMail 2.3sp2/2.4 SMTP Server MAIL FROM memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Computalynx CMail 2.3sp2/2.4. It has been declared as critical. This issue affects some unknown processing of the component SMTP Server. The manipulation of the argument MAIL FROM results in memory corruption. This vulnerability is reported as CVE-1999-1521. Moreover, an exploit is present.

Detailsinfo

A vulnerability classified as very critical has been found in Computalynx CMail 2.3sp2/2.4 (Mail Server Software). Affected is some unknown processing of the component SMTP Server. The manipulation of the argument MAIL FROM with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Computalynx CMail 2.4 and CMail 2.3 SP2 SMTP servers are vulnerable to a buffer overflow attack in the MAIL FROM command that may allow a remote attacker to execute arbitrary code on the server.

The weakness was disclosed 09/12/1999 by Shadow (Website). The advisory is shared for download at xforce.iss.net. This vulnerability is traded as CVE-1999-1521. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/20/2025).

A public exploit has been developed in ANSI C. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 10047 (CMail MAIL FROM 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 74064 (Computalynx CMail SMTP Buffer Overflow Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1138.

The vulnerability is also documented in the databases at X-Force (2240), Exploit-DB (19495), Tenable (10047), SecurityFocus (BID 633†) and Vulnerability Center (SBV-467†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

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: 9.1

VulDB Base Score: 10.0
VulDB Temp Score: 9.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Nessus ID: 10047
Nessus Name: CMail MAIL FROM 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: no mitigation known
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

09/12/1999 🔍
09/12/1999 +0 days 🔍
09/12/1999 +0 days 🔍
09/13/1999 +1 days 🔍
10/29/1999 +46 days 🔍
12/22/2002 +1150 days 🔍
06/21/2014 +4199 days 🔍
10/20/2025 +4139 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Researcher: Shadow
Status: Not defined

CVE: CVE-1999-1521 (🔍)
GCVE (CVE): GCVE-0-1999-1521
GCVE (VulDB): GCVE-100-14832
X-Force: 2240
SecurityFocus: 633 - Computalynx CMail SMTP Buffer Overflow Vulnerability
Vulnerability Center: 467 - Computalynx CMail SMTP Buffer Overflow Vulnerability, High

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

Entryinfo

Created: 06/22/2014 00:46
Updated: 10/20/2025 03:34
Changes: 06/22/2014 00:46 (67), 05/07/2019 06:38 (6), 02/03/2025 11:45 (20), 10/20/2025 03:34 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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