PT-2020-12382 · Avast · Avast Antivirus

Umar Farook · Published 2020-04-01 · Updated 2021-07-21 · CVE-2020-10863

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Avast Antivirus versions prior to 20

Description An issue was discovered that allows attackers to trigger a shutdown via RPC from a Low Integrity process. This is achieved by exploiting the aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe), specifically through the TempShutDownMachine endpoint.

Recommendations For versions prior to 20, update to version 20 or later to resolve the issue. As a temporary workaround, consider restricting access to the aswTask RPC endpoint to prevent exploitation.

Exploit

Fix

Related Identifiers

CVE-2020-10863

Affected Products

Avast Antivirus

References · 5

• 🔥 https://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.md · Exploit
• https://forum.avast.com/index.php?topic=232420.0 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-10863 · Vendor Advisory
• https://forum.avast.com/index.php?topic=232423.0 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10863 · Security Note