AVG Anti-Virus 8.x UPX Archive numeric error

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in AVG Anti-Virus 8.x. Impacted is an unknown function of the component UPX Archive Handler. Performing a manipulation results in numeric error. This vulnerability is cataloged as CVE-2008-3373. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in AVG Anti-Virus 8.x (Anti-Malware Software). This affects some unknown functionality of the component UPX Archive Handler. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on availability. The summary by CVE is:

The files parsing engine in Grisoft AVG Anti-Virus before 8.0.156 allows remote attackers to cause a denial of service (engine crash) via a crafted UPX compressed file, which triggers a divide-by-zero error.

The bug was discovered 07/28/2008. The weakness was shared 08/01/2008 by Sergio Alvarez (Website). The advisory is shared at grisoft.com. This vulnerability is uniquely identified as CVE-2008-3373 since 07/30/2008. 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 33762 (AVG Anti-Virus Crafted UPX File Handling Divide-by-zero Remote DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115869 (AVG Antivirus UPX File Parsing Denial of Service Vulnerability).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at grisoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (44057), Tenable (33762), SecurityFocus (BID 30417†), OSVDB (47212†) and Secunia (SA31290†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
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: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 33762
Nessus Name: AVG Anti-Virus Crafted UPX File Handling Divide-by-zero Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900017
OpenVAS Name: AVG Anti-Virus UPX Processing Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: grisoft.com

Timelineinfo

07/25/2008 🔍
07/28/2008 +3 days 🔍
07/28/2008 +0 days 🔍
07/29/2008 +1 days 🔍
07/29/2008 +0 days 🔍
07/30/2008 +0 days 🔍
07/30/2008 +0 days 🔍
07/30/2008 +0 days 🔍
07/30/2008 +0 days 🔍
08/01/2008 +2 days 🔍
08/03/2008 +2 days 🔍
08/13/2008 +10 days 🔍
05/26/2025 +6130 days 🔍

Sourcesinfo

Advisory: grisoft.com
Researcher: Sergio Alvarez
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2008-3373 (🔍)
GCVE (CVE): GCVE-0-2008-3373
GCVE (VulDB): GCVE-100-3789
X-Force: 44057 - AVG Anti-Virus .UPX file denial of service, Medium Risk
SecurityFocus: 30417 - AVG Anti-Virus UPX File Parsing Denial of Service Vulnerability
Secunia: 31290 - AVG Anti-Virus UPX Processing Denial of Service, Moderately Critical
OSVDB: 47212 - AVG Anti-Virus Crafted UPX File Handling Divide-by-zero Remote DoS
SecurityTracker: 1020570
Vulnerability Center: 19064 - Grisoft AVG Anti-Virus < 8.0.156 Files Parsing Engine Allows Remote DoS via Crafted UPX File, Medium
Vupen: ADV-2008-2225

Entryinfo

Created: 08/13/2008 12:12
Updated: 05/26/2025 09:10
Changes: 08/13/2008 12:12 (95), 08/15/2019 07:53 (1), 05/26/2025 09:10 (18)
Complete: 🔍
Cache ID: 216::103

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