CVE-2021-41689 Information

Description

DCMTK through 3.6.6 does not handle string copy properly. Sending specific requests to the dcmqrdb program it would query its database and copy the result even if the result is null which can incur a head-based overflow. An attacker can use it to launch a DoS attack.

Reference

https://github.com/DCMTK/dcmtk https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920d