VDB-152647 · CVE-2020-10864 · GCVE-0-2020-10864

Avast Antivirus up to 19 TaskEx Library AvastSvc.exe input validation

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Avast Antivirus up to 19. It has been classified as problematic. Affected by this vulnerability is an unknown functionality of the file AvastSvc.exe of the component TaskEx Library. This manipulation causes input validation. This vulnerability is tracked as CVE-2020-10864. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Avast Antivirus up to 19 (Anti-Malware Software). It has been declared as problematic. Affected by this vulnerability is an unknown code block of the file AvastSvc.exe of the component TaskEx Library. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

An issue was discovered in Avast Antivirus before 20. The aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe) allows attackers to trigger a reboot via RPC from a Low Integrity process.

The weakness was disclosed 04/01/2020. This vulnerability is known as CVE-2020-10864 since 03/23/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 20 eliminates this vulnerability.

The entries VDB-152651, VDB-152650, VDB-152648 and VDB-152646 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Anti-Malware Software

Vendor

Avast

Name

Antivirus

Version

License

free

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Antivirus 20

Timelineinfo

03/23/2020 🔍
04/01/2020 +9 days 🔍
04/02/2020 +1 days 🔍
05/09/2025 +1863 days 🔍

Sourcesinfo

Advisory: forum.avast.com
Status: Confirmed

CVE: CVE-2020-10864 (🔍)
GCVE (CVE): GCVE-0-2020-10864
GCVE (VulDB): GCVE-100-152647
See also: 🔍

Entryinfo

Created: 04/02/2020 13:11
Updated: 05/09/2025 23:34
Changes: 04/02/2020 13:11 (39), 07/29/2020 20:10 (18), 05/13/2024 07:46 (18), 05/09/2025 23:34 (6)
Complete: 🔍
Cache ID: 216::103