LAN Messenger up to 1.2.28 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.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in LAN Messenger up to 1.2.28. It has been rated as critical. This affects an unknown function. This manipulation causes memory corruption. This vulnerability is handled as CVE-2012-3845. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as critical was found in LAN Messenger up to 1.2.28 (Messaging Software). Affected by this vulnerability is an unknown function. The manipulation 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 availability. The summary by CVE is:

Buffer overflow in LAN Messenger 1.2.28 and earlier allows remote attackers to cause a denial of service (crash) via a long string in an initiation request.

The weakness was released 07/03/2012 by Julien Ahrens (Website). The advisory is shared at archives.neohapsis.com. This vulnerability is known as CVE-2012-3845 since 07/03/2012. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed in Python. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (75319), Exploit-DB (18816), SecurityFocus (BID 53333†) and OSVDB (81803†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Messaging Software

Name

• LAN Messenger

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9
• 1.2.10
• 1.2.11
• 1.2.12
• 1.2.13
• 1.2.14
• 1.2.15
• 1.2.16
• 1.2.17
• 1.2.18
• 1.2.19
• 1.2.20
• 1.2.21
• 1.2.22
• 1.2.23
• 1.2.24
• 1.2.25
• 1.2.26
• 1.2.27
• 1.2.28

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

OpenVAS ID: 802627
OpenVAS Name: LAN Messenger Malformed Initiation Request Remote Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/02/2012 🔍
07/03/2012 +62 days 🔍
07/03/2012 +0 days 🔍
07/03/2012 +0 days 🔍
03/23/2015 +993 days 🔍
07/05/2025 +3757 days 🔍

Sourcesinfo

Advisory: archives.neohapsis.com
Researcher: Julien Ahrens
Status: Not defined

CVE: CVE-2012-3845 (🔍)
GCVE (CVE): GCVE-0-2012-3845
GCVE (VulDB): GCVE-100-61201
X-Force: 75319
SecurityFocus: 53333 - LAN Messenger Malformed Packet Remote Denial of Service Vulnerability
OSVDB: 81803

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

Entryinfo

Created: 03/23/2015 16:50
Updated: 07/05/2025 20:28
Changes: 03/23/2015 16:50 (59), 03/27/2019 16:41 (2), 07/05/2025 20:28 (20)
Complete: 🔍
Cache ID: 216:201:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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