Avast Antivirus up to 16 Self-Defense access control

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.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Avast Antivirus up to 16. This vulnerability affects unknown code of the component Self-Defense. Executing a manipulation can lead to access control. This vulnerability is tracked as CVE-2017-8308. The attack is restricted to local execution. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Avast Antivirus up to 16 (Anti-Malware Software) and classified as critical. This vulnerability affects an unknown part of the component Self-Defense. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In Avast Antivirus before v17, an unprivileged user (and thus malware or a virus) can mark an arbitrary process as Trusted from the perspective of the Avast product. This bypasses the Self-Defense feature of the product, opening a door to subsequent attack on many of its components.

The bug was discovered 03/31/2017. The weakness was disclosed 04/27/2017 by Martin (Website). The advisory is available at trustwave.com. This vulnerability was named CVE-2017-8308 since 04/27/2017. Local access is required to approach this attack. A single authentication is necessary for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 17 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 98084†). The entry VDB-100641 is pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Anti-Malware Software

Vendor

• Avast

Name

• Antivirus

Version

• 16

License

• free

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

OpenVAS ID: 801111
OpenVAS Name: Avast Pro Antivirus Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Antivirus 17

Timelineinfo

03/31/2017 🔍
04/27/2017 +27 days 🔍
04/27/2017 +0 days 🔍
04/27/2017 +0 days 🔍
04/27/2017 +0 days 🔍
04/28/2017 +1 days 🔍
12/21/2020 +1333 days 🔍

Sourcesinfo

Advisory: trustwave.com
Researcher: Martin Rakhmanov (Martin)
Status: Not defined

CVE: CVE-2017-8308 (🔍)
GCVE (CVE): GCVE-0-2017-8308
GCVE (VulDB): GCVE-100-100642
SecurityFocus: 98084 - Avast! Antivirus CVE-2017-8308 Security Bypass Vulnerability
OSVDB: - CVE-2017-8308 - Avast - Antivirus - Medium

See also: 🔍

Entryinfo

Created: 04/28/2017 20:18
Updated: 12/21/2020 16:13
Changes: 04/28/2017 20:18 (67), 09/21/2020 16:54 (4), 12/21/2020 16:13 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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