High severity · published Jun 28, 2022
CVE-2021-41690
DCMTK through 3.6.6 does not handle memory free properly
7.5
CVSS
1.8%
EPSS
No
On KEV
Description
DCMTK through 3.6.6 does not handle memory free properly. The malloced memory for storing all file information are recorded in a global variable LST and are not freed properly. Sending specific requests to the dcmqrdb program can incur a memory leak. 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)1.8% · higher than 79% 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-2021-41690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-41690
Product
https://github.com/DCMTK/dcmtk
Patch
https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb
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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