DCMTK up to 3.6.5 dcmqrscp parseQuota StorageQuota stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in DCMTK up to 3.6.5. The impacted element is the function parseQuota of the component dcmqrscp. The manipulation of the argument StorageQuota results in stack-based overflow. This vulnerability was named CVE-2020-36855. The attack needs to be approached locally. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in DCMTK up to 3.6.5. It has been classified as critical. Affected is the function parseQuota of the component dcmqrscp. The manipulation of the argument StorageQuota with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at shimo.im. This vulnerability is traded as CVE-2020-36855. The exploitability is told to be easy. The attack needs to be approached locally. Technical details and a public exploit are known.

The exploit is shared for download at shimo.im. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 271652 (Linux Distros Unpatched Vulnerability : CVE-2020-36855), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.6.6 eliminates this vulnerability. Applying the patch 0fef9f02e is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (271652). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 271652
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-36855

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: DCMTK 3.6.6
Patch: 0fef9f02e

Timelineinfo

10/19/2025 Advisory disclosed
10/19/2025 +0 days VulDB entry created
10/31/2025 +12 days VulDB entry last update

Sourcesinfo

Advisory: 1026
Status: Confirmed

CVE: CVE-2020-36855 (🔒)
GCVE (CVE): GCVE-0-2020-36855
GCVE (VulDB): GCVE-100-329028
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/19/2025 12:32
Updated: 10/31/2025 16:42
Changes: 10/19/2025 12:32 (59), 10/22/2025 06:51 (30), 10/28/2025 01:38 (2), 10/31/2025 16:42 (11)
Complete: 🔍
Submitter: zh_vul
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #673137: DCMTK GitHub Repository DCMTK 3.6.5 Stack-based Buffer Overflow (by zh_vul)

Once again VulDB remains the best source for vulnerability data.

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