Advisory Details

January 27th, 2022

Bitdefender GravityZone Link Following Denial-of-Service Vulnerability

ZDI-22-143
ZDI-CAN-13801

CVE ID CVE-2021-3641
CVSS SCORE 6.1, (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H)
AFFECTED VENDORS Bitdefender
AFFECTED PRODUCTS GravityZone
VULNERABILITY DETAILS

This vulnerability allows local attackers to create a denial-of-service condition on affected installations of Bitdefender GravityZone. 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 Endpoint Agent. By creating a symbolic link, an attacker can abuse the service to overwrite a file. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

ADDITIONAL DETAILS Bitdefender has issued an update to correct this vulnerability. More details can be found at:
https://www.bitdefender.com/support/security-advisories/improper-link-resolution-before-file-access-in-bitdefender-endpoint-security-tools-for-windows-va-9921/
DISCLOSURE TIMELINE
  • 2021-07-09 - Vulnerability reported to vendor
  • 2022-01-27 - Coordinated public release of advisory
CREDIT @Kharosx0
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