Avast Antivirus Professional up to 4.8.1350 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

A vulnerability was found in Avast Antivirus Professional up to 4.8.1350 (Anti-Malware Software). It has been rated as critical. Affected by this issue is some unknown processing. 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. CVE summarizes:

Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351, and possibly other versions before 4.8.1356, allows local users to cause a denial of service (system crash) and possibly gain privileges via a crafted IOCTL request to IOCTL 0xb2c80018.

The bug was discovered 09/13/2009. The weakness was released 09/23/2009 (Website). The advisory is shared for download at evilfingers.com. This vulnerability is handled as CVE-2009-3522 since 10/01/2009. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in ANSI C. 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 10 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 42261 (avast! Professional Edition < 4.8.1356 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows.

Upgrading to version 4.8.1351 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (53456), Tenable (42261), SecurityFocus (BID 36507†), OSVDB (58402†) and Secunia (SA36858†).

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.4

VulDB Base Score: 9.3
VulDB Temp Score: 8.4
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: 🔍

Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 42261
Nessus Name: avast! Professional Edition < 4.8.1356 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 801111
OpenVAS Name: avast! Multiple Vulnerabilities - Oct09 (Win)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Antivirus Professional 4.8.1351

Timelineinfo

09/13/2009 🔍
09/23/2009 +10 days 🔍
09/23/2009 +0 days 🔍
09/23/2009 +0 days 🔍
09/24/2009 +1 days 🔍
09/24/2009 +0 days 🔍
09/24/2009 +0 days 🔍
10/01/2009 +6 days 🔍
10/01/2009 +0 days 🔍
10/27/2009 +26 days 🔍
11/03/2009 +7 days 🔍
03/18/2015 +1961 days 🔍
08/23/2021 +2350 days 🔍

Sourcesinfo

Advisory: evilfingers.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-3522 (🔍)
OVAL: 🔍

X-Force: 53456
SecurityFocus: 36507 - Avast! Antivirus 'aswMon2.sys' Driver Local Privilege Escalation Vulnerability
Secunia: 36858 - avast! Home/Professional Multiple Vulnerabilities, Less Critical
OSVDB: 58402 - avast! Home / Professional aswMon2.sys IOCTL Handling Memory Corruption Local Privilege Escalation
SecurityTracker: 1022940 - avast! 'aswMon2.sys' IOCTL Memory Corruption Flaw May Let Local Users Gain Elevated Privileges
Vulnerability Center: 23916 - Avast! Antivirus 4.8.1351.0 \x27aswMon2.sys\x27 Driver Local Privilege Escalation Vulnerability, High
Vupen: ADV-2009-2761

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

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/23/2021 12:58
Changes: 03/18/2015 15:15 (70), 09/15/2017 09:40 (20), 08/23/2021 12:58 (3)
Complete: 🔍
Cache ID: 3:4E6:103

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