Link following in Avast Antivirus - CVE-2024-7227

Vulnerability identifier: #VU95569

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2024-7227

CWE-ID: CWE-59

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Avast Software s.r.o.

Affected software:
Avast Antivirus

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists dye to incorrect handling of symbolic links within the Avast Service (AvastSvc). A local user can create a symbolic link to a critical file on the system and delete it, which can result in privilege escalation.

Install updates from vendor's website.

• https://www.zerodayinitiative.com/advisories/ZDI-24-1003/