Advisory Details

March 9th, 2022

Bitdefender Total Security Link Following Denial-of-Service Vulnerability

ZDI-22-483
ZDI-CAN-15197

CVE ID CVE-2021-4198
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 Total Security
VULNERABILITY DETAILS

This vulnerability allows local attackers to create a denial-of-service condition on affected installations of Bitdefender 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 Bitdefender Virus Shield. By creating a symbolic link, an attacker can abuse the service to delete files. 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/messaging_ipc-dll-null-pointer-dereference-in-multiple-bitdefender-products-va-10016/
DISCLOSURE TIMELINE
  • 2021-09-08 - Vulnerability reported to vendor
  • 2022-03-09 - Coordinated public release of advisory
CREDIT Michael DePlante (@izobashi) of Trend Micro's Zero Day Initiative
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