Vulnerability Details : 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.
Vulnerability category: Gain privilege
Products affected by CVE-2021-45339
- cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-45339
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-45339
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-45339
-
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-45339
-
https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0
Vulnerability-Disclosures/CVE-2021-AVST0 at main · the-deniss/Vulnerability-Disclosures · GitHubExploit;Third Party Advisory
-
https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0
Researcher Wladimir Palant supports Avast's efforts to protect its users, by submitting vulnerability reportsVendor Advisory
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