CVE-2021-41690

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 v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/DCMTK/dcmtk	Product Third Party Advisory
https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
https://github.com/DCMTK/dcmtk	Product Third Party Advisory
https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html
https://lists.debian.org/debian-lts-announce/2025/01/msg00032.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:offis:dcmtk:*:*:*:*:*:*:*:*

History

03 Nov 2025, 21:15

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2025/01/msg00032.html -

Information

Published : 2022-06-28 13:15

Updated : 2025-11-03 21:15

NVD link : CVE-2021-41690

Mitre link : CVE-2021-41690

CVE.ORG link : CVE-2021-41690

JSON object : View

Products Affected

offis

dcmtk

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

{"id": "CVE-2021-41690", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2022-06-28T13:15:10.783", "references": [{"url": "https://github.com/DCMTK/dcmtk", "tags": ["Product", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html", "source": "cve@mitre.org"}, {"url": "https://github.com/DCMTK/dcmtk", "tags": ["Product", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/DCMTK/dcmtk/commit/a9697dfeb672b0b9412c00c7d36d801e27ec85cb", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00022.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00032.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "DCMTK versiones hasta 3.6.6 no maneja apropiadamente la memoria libre. La memoria mallocada para almacenar toda la informaci\u00f3n de los archivos es registrada en una variable global LST y no es liberada apropiadamente. El env\u00edo de peticiones espec\u00edficas al programa dcmqrdb puede incurrir en una p\u00e9rdida de memoria. Un atacante puede usarla para lanzar un ataque DoS"}], "lastModified": "2025-11-03T21:15:43.707", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:offis:dcmtk:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8F06D153-851C-4E6F-B524-2A8D40A8F634", "versionEndIncluding": "3.6.6"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}