CVE-2021-45339

Privilege escalation vulnerability in Avast Antivirus prior to 20.4 allows a local user to gain elevated privileges by "hollowing" trusted process which could lead to the bypassing of Avast self-defense.

CVSS v3 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0	Exploit Third Party Advisory
https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0	Vendor Advisory
https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0	Exploit Third Party Advisory
https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:32

Type	Values Removed	Values Added
References	~~() https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0 - Exploit, Third Party Advisory~~	() https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0 - Exploit, Third Party Advisory
References	~~() https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0 - Vendor Advisory~~	() https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0 - Vendor Advisory

Information

Published : 2021-12-27 14:15

Updated : 2024-11-21 06:32

NVD link : CVE-2021-45339

Mitre link : CVE-2021-45339

CVE.ORG link : CVE-2021-45339

JSON object : View

Products Affected

avast

antivirus

CWE

CWE-863

Incorrect Authorization

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