Privilege Escalation Vulnerability in Avast Antivirus Self-Defense Driver
CVE-2021-45337

8.8HIGH

Key Information:

Vendor

Avast

Status
Antivirus
Vendor
CVE Published:
27 December 2021

What is CVE-2021-45337?

A privilege escalation vulnerability exists in the Self-Defense driver of Avast Antivirus, affecting versions prior to 20.8. This flaw allows local users with SYSTEM privileges to perform process hollowing on wsc_proxy.exe. By exploiting this vulnerability, attackers could potentially bypass antimalware protection mechanisms, leading to unauthorized escalation of privileges within the system.

References

https://www.avast.com/hacker-hall-of-fame/en/researcher-d...
x_refsource_MISC
https://github.com/the-deniss/Vulnerability-Disclosures/t...
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-45337 : Privilege Escalation Vulnerability in Avast Antivirus Self-Defense Driver