Advisory Details

May 17th, 2024

Avira Prime Link Following Local Privilege Escalation Vulnerability

CVE ID	CVE-2023-51636
CVSS SCORE	7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Avira
AFFECTED PRODUCTS	Prime
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on affected installations of Avira Prime. 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 Avira Spotlight Service. By creating a symbolic link, an attacker can abuse the service to delete a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
ADDITIONAL DETAILS	Fixed in Speedup version 6.27.19 https://public-beta.avira.com/download/speedup-windows/avira_system_speedup.exe
DISCLOSURE TIMELINE	2023-11-01 - Vulnerability reported to vendor 2024-05-17 - Coordinated public release of advisory 2024-07-01 - Advisory Updated
CREDIT	Filip Dragovic (@filip_dragovic)

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