CVE-2021-41689
mediumpriority · track · 31EPSS 0.019 · 80 %ileEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2021-41689/cnnvd
- https://github.com/DCMTK/dcmtkcnnvd
- https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920dcnnvd
- https://github.com/DCMTK/dcmtkenisa_euvd
- https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920denisa_euvd
- https://lists.debian.org/debian-lts-announce/2024/06/msg00022.htmlenisa_euvd
- https://github.com/DCMTK/dcmtkProductThird Party Advisorynvd
- https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920dPatchThird Party Advisorynvd
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