Davide Libenzi XMail 0.58 USER Command memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Davide Libenzi XMail 0.58. Affected is an unknown function of the component USER Command Handler. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2000-0840. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Davide Libenzi XMail 0.58 and classified as very critical. This issue affects an unknown code of the component USER Command Handler. The manipulation 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. The summary by CVE is:

Buffer overflow in XMail POP3 server before version 0.59 allows remote attackers to execute arbitrary commands via a long USER command.

The weakness was released 11/14/2000 by FIRST with SecuriTeam as not defined posting (Bugtraq). It is possible to read the advisory at archives.neohapsis.com. The identification of this vulnerability is CVE-2000-0840. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2025).

The vulnerability scanner Nessus provides a plugin with the ID 10559 (XMail APOP / USER Command Remote Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gain a shell remotely and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 74051 (Davide Libenzi XMail Buffer Overflow Vulnerability).

Upgrading to version 0.59 eliminates this vulnerability. Attack attempts may be identified with Snort ID 1635.

The vulnerability is also documented in the databases at X-Force (5192), Tenable (10559), SecurityFocus (BID 1652†) and Vulnerability Center (SBV-4577†). Entry connected to this vulnerability is available at VDB-15972. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10559
Nessus Name: XMail APOP / USER Command Remote Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: XMail 0.59

Snort ID: 1635
Snort Message: PROTOCOL-POP APOP overflow attempt
Snort Class: 🔍

Suricata ID: 2101635
Suricata Class: 🔍
Suricata Message: 🔍
SourceFire IPS: 🔍

Timelineinfo

09/07/2000 🔍
11/14/2000 +68 days 🔍
11/14/2000 +0 days 🔍
11/14/2000 +0 days 🔍
11/28/2000 +14 days 🔍
06/20/2004 +1300 days 🔍
06/30/2014 +3662 days 🔍
10/12/2025 +4122 days 🔍

Sourcesinfo

Advisory: archives.neohapsis.com
Researcher: FIRST
Organization: SecuriTeam
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2000-0840 (🔍)
GCVE (CVE): GCVE-0-2000-0840
GCVE (VulDB): GCVE-100-15971
X-Force: 5192
SecurityFocus: 1652 - XMail Buffer Overflow Vulnerability
Vulnerability Center: 4577 - Buffer Overflow in Xmail pop3 Server Allows Arbitrary Code Execution via Long USER Command, High

See also: 🔍

Entryinfo

Created: 06/30/2014 12:43
Updated: 10/12/2025 19:44
Changes: 06/30/2014 12:43 (72), 05/22/2019 12:12 (4), 06/25/2021 09:07 (2), 10/12/2025 19:44 (18)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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