Advisory Details

May 17th, 2024

Avira Prime Link Following Local Privilege Escalation Vulnerability

ZDI-24-469
ZDI-CAN-21600

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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