High severity · published Jun 28, 2022
CVE-2021-41689
DCMTK through 3.6.6 does not handle string copy properly
7.5
CVSS
1.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DC
Dcmtk · Offis
through 3.6.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-41689
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-41689
Product
https://github.com/DCMTK/dcmtk
Patch
https://github.com/DCMTK/dcmtk/commit/5c14bf53fb42ceca12bbcc0016e8704b1580920d
lists.debian.org
https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/01/msg00032.html
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