Privilege Escalation in Avast Antivirus Software
CVE-2021-45339

7.8HIGH

Key Information:

Vendor

Avast

Status
Antivirus
Vendor
CVE Published:
27 December 2021

What is CVE-2021-45339?

A privilege escalation vulnerability exists in Avast Antivirus prior to version 20.4 that enables a local attacker to exploit the software through a technique known as 'hollowing'. This allows the attacker to elevate their privileges by manipulating trusted processes, potentially bypassing Avast's built-in self-defense mechanisms and compromising the integrity of the security software.

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:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-45339 : Privilege Escalation in Avast Antivirus Software