What is CVE-2023-42124?

CVE-2023-42124 is a high-severity vulnerability in Avast Premium Security, classified under Incorrect Authorization. CVSS score: 7.8/10. Published 2024-05-03.

How severe is CVE-2023-42124?

High severity. CVSS v3 base score is 7.8 out of 10.

Auth bypass in Avast Premium Security

CVE-2023-42124

Avast Premium Security Sandbox Protection Incorrect Authorization Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Avast Premium Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the implementation of the sandbox feature. The issue results from incorrect authorization. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code outside the sandbox at medium integrity. . Was ZDI-CAN-20178.

Vulnerability class: Broken Access Control

EPSS: 0.003 (20.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Avast Premium Security — versions Avast Premium Security 22.12.6044 (build 22.12.7758.769)
Avast Premium_security — versions 22.12.6044

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

zdi-disclosures@trendmicro.com (x_research-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2023-42124?: CVE-2023-42124 is a high-severity vulnerability in Avast Premium Security, classified under Incorrect Authorization. CVSS score: 7.8/10. Published 2024-05-03.
How severe is CVE-2023-42124?: High severity. CVSS v3 base score is 7.8 out of 10.