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.
4.6	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in Sophos Anti-Virus (Anti-Malware Software). This affects an unknown function of the component Archive Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on integrity. The summary by CVE is:

The virus detection engine in Sophos Anti-Virus before 2.49.0 does not properly process malformed (1) CAB, (2) LZH, and (3) RAR files with modified headers, which might allow remote attackers to bypass malware detection.

The weakness was disclosed 09/07/2007 by Thierry Zoller with n.runs AG (Website). The advisory is shared at sophos.com. This vulnerability is uniquely identified as CVE-2007-4787 since 09/10/2007. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 26002 (Sophos Anti-Virus CAB, RAR and LZH Scanning Evasion), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at sophos.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (36502) and Tenable (26002). The entry 3296 is pretty similar.

Productinfo

Type

• Anti-Malware Software

Vendor

• Sophos

Name

• Anti-Virus

Version

• 3.4.6
• 3.78
• 3.78d
• 3.79
• 3.80
• 3.81
• 3.82
• 3.83
• 3.84
• 3.85
• 3.86
• 3.90
• 3.91
• 3.95
• 3.96
• 4.04
• 4.05
• 4.5.3
• 4.5.4
• 4.5.11
• 4.5.12
• 4.7.1
• 4.7.2
• 5.0.1
• 5.0.2
• 5.0.4
• 5.2.0
• 5.2.1
• 6.0
• 6.5
• 6.5.4 R2
• 6.5.8
• 7.0

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 26002
Nessus Name: Sophos Anti-Virus CAB, RAR and LZH Scanning Evasion
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: sophos.com

Timelineinfo

09/04/2007 🔍
09/06/2007 +2 days 🔍
09/07/2007 +1 days 🔍
09/07/2007 +0 days 🔍
09/07/2007 +0 days 🔍
09/10/2007 +2 days 🔍
09/10/2007 +0 days 🔍
09/11/2007 +1 days 🔍
09/19/2007 +8 days 🔍
03/15/2021 +4926 days 🔍

Sourcesinfo

Vendor: sophos.com

Advisory: sophos.com
Researcher: Thierry Zoller
Organization: n.runs AG
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-4787 (🔍)
X-Force: 36502 - Sophos Anti-Virus multiple archive security bypass, Low Risk
Vulnerability Center: 16020 - Sophos Anti-Virus Virus Detection Engine Vulnerability Allows CAB, LZH and RAR Files to Bypass Scan, Medium
SecurityFocus: 25574 - Sophos Anti-Virus CAB, LZH, and RAR File Scan Evasion Vulnerability
Secunia: 26726 - Sophos Anti-Virus Multiple Archive Detection Bypass, Not Critical
OSVDB: 37988 - Sophos Anti-Virus Multiple Archive Scan Detection Bypass
Vupen: ADV-2007-3078

See also: 🔍

Entryinfo

Created: 09/19/2007 09:00
Updated: 03/15/2021 17:47
Changes: 09/19/2007 09:00 (77), 01/02/2017 10:25 (9), 03/15/2021 17:47 (3)
Complete: 🔍

Discussion

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