What’s Vulnerable › Vulnerabilities

CVE-2021-41689

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-06-28 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• OFFIS DCMTK: through 3.6.6

References

• https://github.com/DCMTK/dcmtk
• https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920d
• https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
• https://github.com/DCMTK/dcmtk
• https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920d
• https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
• https://lists.debian.org/debian-lts-announce/2025/01/msg00032.html

Get alerted when CVE-2021-41689 or the next vulnerability affects your stack