Sophos Anti-Virus 5.1 memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Sophos Anti-Virus 5.1. This affects an unknown part. Such manipulation leads to memory allocation. This vulnerability is listed as CVE-2006-4839. In addition, an exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Sophos Anti-Virus 5.1 (Anti-Malware Software). Affected by this issue is an unknown function. The manipulation with an unknown input leads to a memory allocation vulnerability. Using CWE to declare the problem leads to CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Impacted is availability. CVE summarizes:

Sophos Anti-Virus 5.1 allows remote attackers to cause a denial of service (memory consumption) via a file that is compressed with Petite and contains a large number of sections.

The bug was discovered 10/27/2006. The weakness was presented 11/01/2006 by Damian Put (Website). The advisory is shared for download at labs.idefense.com. This vulnerability is handled as CVE-2006-4839 since 09/15/2006. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $5k-$25k.

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 (29918), SecurityFocus (BID 20816†), OSVDB (30111†), Secunia (SA22635†) and SecurityTracker (ID 1017132†). See VDB-2642, VDB-2641, VDB-2644 and VDB-2643 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
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 allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/15/2006 🔍
10/27/2006 +42 days 🔍
10/27/2006 +0 days 🔍
10/30/2006 +3 days 🔍
10/30/2006 +0 days 🔍
10/30/2006 +0 days 🔍
11/01/2006 +2 days 🔍
11/01/2006 +0 days 🔍
09/04/2007 +307 days 🔍
03/12/2015 +2746 days 🔍
04/26/2026 +4062 days 🔍

Sourcesinfo

Vendor: sophos.com

Advisory: labs.idefense.com⛔
Researcher: Damian Put
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-4839 (🔍)
GCVE (CVE): GCVE-0-2006-4839
GCVE (VulDB): GCVE-100-33068
X-Force: 29918
SecurityFocus: 20816 - Sophos Antivirus Multiple Denial of Service and Memory Corruption Vulnerabilities
Secunia: 22635
OSVDB: 30111 - CVE-2006-4839 - Sophos - Anti-Virus - Denial-Of-Service Issue
SecurityTracker: 1017132
Vulnerability Center: 15981 - Sophos Anti-Virus 5.1 Remote DoS via a File Compressed with Petite, Medium
Vupen: ADV-2006-4239

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

Entryinfo

Created: 03/12/2015 22:21
Updated: 04/26/2026 01:34
Changes: 03/12/2015 22:21 (70), 07/25/2019 11:54 (3), 04/26/2026 01:34 (17)
Complete: 🔍
Cache ID: 216::103

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