VDB-188038 · CVE-2021-39938 · Issue 34487

GitLab Community Edition/Enterprise Edition up to 14.3.5/14.4.3/14.5.1 Regular Expression resource consumption

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.
3.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 14.3.5/14.4.3/14.5.1 and classified as problematic. This issue affects some unknown processing of the component Regular Expression Handler. Executing a manipulation can lead to resource consumption. This vulnerability appears as CVE-2021-39938. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in GitLab Community Edition and Enterprise Edition up to 14.3.5/14.4.3/14.5.1 (Bug Tracking Software). This vulnerability affects an unknown code of the component Regular Expression Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability.

The weakness was presented 12/13/2021 as 34487. The advisory is available at gitlab.com. This vulnerability was named CVE-2021-39938. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 14.3.6, 14.4.4 or 14.5.2 eliminates this vulnerability.

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Productinfo

Type

Bug Tracking Software

Vendor

GitLab

Name

Version

License

open-source

Website

Vendor: https://gitlab.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.1
CNA Vector (GitLab Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Community Edition/Enterprise Edition 14.3.6/14.4.4/14.5.2

Timelineinfo

08/23/2021 🔍
12/13/2021 +112 days 🔍
12/13/2021 +0 days 🔍
12/16/2021 +3 days 🔍

Sourcesinfo

Vendor: gitlab.com

Advisory: 34487
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-39938 (🔍)
GCVE (CVE): GCVE-0-2021-39938
GCVE (VulDB): GCVE-100-188038

Entryinfo

Created: 12/13/2021 19:06
Updated: 12/16/2021 08:48
Changes: 12/13/2021 19:06 (50), 12/16/2021 08:48 (3)
Complete: 🔍
Cache ID: 216::103