PT-2023-11546 · Avast · Avast Antivirus

Published 2023-07-11 · Updated 2023-07-18 · CVE-2020-20118

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Avast AntiVirus versions prior to 19.7

Description A Buffer Overflow issue allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver. This can be exploited by sending a specifically designed request to the driver, potentially leading to a denial of service.

Recommendations For Avast AntiVirus versions prior to 19.7, update to version 19.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the aswSnx.sys driver to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2020-20118

Affected Products

Avast Antivirus

References · 5

• https://gitlab.com/yongchuank/avast-aswsnx-ioctl-82ac0060-oob-write · Patch
• http://avast.com · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-20118 · Security Note
• https://osv.dev/vulnerability/CVE-2020-20118 · Vendor Advisory
• https://t.me/cibsecurity/66386 · Telegram Post