Avast! Antivirus/Internet Security 11.1.2245 Virtualization Kernel Mode Driver memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Avast! Antivirus and Internet Security 11.1.2245. It has been declared as problematic. This vulnerability affects unknown code of the component Virtualization Kernel Mode Driver. The manipulation leads to memory corruption. This vulnerability was named CVE-2015-8620. Attacking locally is a requirement. There is no exploit available. It is recommended to upgrade the affected component. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability was found in Avast! Antivirus and Internet Security 11.1.2245 (Anti-Malware Software). It has been classified as critical. This affects some unknown processing of the component Virtualization Kernel Mode Driver. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in the Avast virtualization driver (aswSnx.sys) in Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus before 11.1.2253 allows local users to gain privileges via a Unicode file path in an IOCTL request.

The weakness was disclosed 02/18/2016 by Kyriakos Economou as confirmed mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2015-8620 since 12/23/2015. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 11.1.2253 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (110863), SecurityFocus (BID 83348†) and Vulnerability Center (SBV-58236†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.8
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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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: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 801111
OpenVAS Name: Avast Pro Heap-Based Buffer Overflow Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Antivirus/Internet Security 11.1.2253

Timelineinfo

12/23/2015 🔍
02/18/2016 +57 days 🔍
02/18/2016 +0 days 🔍
02/18/2016 +0 days 🔍
02/24/2016 +6 days 🔍
04/13/2016 +48 days 🔍
04/17/2016 +4 days 🔍
07/08/2022 +2273 days 🔍

Sourcesinfo

Advisory: 135859
Researcher: Kyriakos Economou
Status: Confirmed

CVE: CVE-2015-8620 (🔍)
GCVE (CVE): GCVE-0-2015-8620
GCVE (VulDB): GCVE-100-81087
X-Force: 110863 - Avast! Antivirus Virtualization kernel mode driver buffer overflow
SecurityFocus: 83348 - Multiple Avast! Products CVE-2015-8620 Local Heap Based Buffer Overflow Vulnerability
SecurityTracker: 1035093
Vulnerability Center: 58236 - Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus Local Privilege Escalation Vulnerability, High

Entryinfo

Created: 02/24/2016 10:14 AM
Updated: 07/08/2022 02:23 PM
Changes: 02/24/2016 10:14 AM (66), 02/05/2019 12:24 PM (11), 07/08/2022 02:23 PM (4)
Complete: 🔍
Cache ID: 18:DC2:40

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