#VU26542 Input validation error in Avast Antivirus


Published: 2020-04-02

Vulnerability identifier: #VU26542

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10864

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Avast Antivirus
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Avast Software s.r.o.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe). A remote attacker can trigger a reboot via RPC from a Low Integrity process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Avast Antivirus: 19.8.2393


External links
http://forum.avast.com/index.php?topic=232420.0
http://forum.avast.com/index.php?topic=232423.0
http://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.md


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability