Advisory Details

April 5th, 2023

G DATA Total Security Link Following Local Privilege Escalation Vulnerability

ZDI-23-379
ZDI-CAN-18749

CVE ID CVE-2023-27347
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS G DATA
AFFECTED PRODUCTS Total Security
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of G Data Total 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 G DATA Backup Service. By creating a symbolic link, an attacker can abuse the service to create arbitrary files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

ADDITIONAL DETAILS

Fixed in version is 25.5.13.26


DISCLOSURE TIMELINE
  • 2022-10-26 - Vulnerability reported to vendor
  • 2023-04-05 - Coordinated public release of advisory
  • 2023-12-07 - Advisory Updated
CREDIT Dennis Herrmann (@dhn_)
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