DCMTK up to 3.6.6 Parser memory leak

EntryHistoryDiffjsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.00

A vulnerability has been found in DCMTK up to 3.6.6 and classified as problematic. Affected by this vulnerability is an unknown function of the component Parser. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

DCMTK through 3.6.6 does not handle memory free properly. The program malloc a heap memory for parsing data, but does not free it when error in parsing. Sending specific requests to the dcmqrdb program incur the memory leak. An attacker can use it to launch a DoS attack.

The weakness was shared 06/29/2022 as a9697dfeb672b0b9412c00c7d36d801e27ec85cb. The advisory is shared at github.com. This vulnerability is known as CVE-2021-41687 since 09/27/2021. Neither technical details nor an exploit are publicly available.

Applying the patch a9697dfeb672b0b9412c00c7d36d801e27ec85cb is able to eliminate this problem. The bugfix is ready for download at github.com.

Productinfo

Name

DCMTK

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: a9697dfeb672b0b9412c00c7d36d801e27ec85cb

Timelineinfo

09/27/2021 🔍
06/29/2022 +275 days 🔍
06/29/2022 +0 days 🔍
07/16/2022 +17 days 🔍

Sourcesinfo

Advisory: a9697dfeb672b0b9412c00c7d36d801e27ec85cb
Status: Confirmed

CVE: CVE-2021-41687 (🔍)

Entryinfo

Created: 06/29/2022 07:53
Updated: 07/16/2022 11:20
Changes: 06/29/2022 07:53 (41), 07/16/2022 11:20 (18)
Complete: 🔍