CVE-2023-42125: avast premium_security

Vulnerability summary

CVE-2023-42125 is a high (CVSS 7.8) vulnerability in avast premium_security. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34.2% of scored vulnerabilities.

Timeline

1. 03-05-2024
   PublishedVulnerability first disclosed.
2. 20-09-2024
   Last modifiedVulnerability information updated.

Description

Avast Premium Security Sandbox Protection Link Following 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. By creating a symbolic link, an attacker can abuse the service to create arbitrary namespace objects. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. . Was ZDI-CAN-20383.

• CWE-706Use of Incorrectly-Resolved Name or ReferenceThe product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.
• CWE-59Improper Link Resolution Before File Access ('Link Following')The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.