CVE-2021-39947

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs

En circunstancias específicas, los búferes de archivos de rastreo en GitLab Runner versiones hasta 14.3.4, 14.4 a 14.4.2, y 14.5 a 14.5.2 reusarían el descriptor de archivo 0 para múltiples rastreos y mezclarían la salida de varios trabajos

*Credits: This vulnerability has been discovered internally by the GitLab team

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-23 CVE Reserved
2022-06-06 CVE Published
2023-12-28 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (2)

URL	Tag	Source
https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732	Broken Link

URL	Date	SRC

URL	Date	SRC
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json	2023-08-08

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gitlab Search vendor "Gitlab"		Gitlab Runner Search vendor "Gitlab" for product "Gitlab Runner"				< 14.3.4 Search vendor "Gitlab" for product "Gitlab Runner" and version " < 14.3.4"		-		Affected
Gitlab Search vendor "Gitlab"		Gitlab Runner Search vendor "Gitlab" for product "Gitlab Runner"				>= 14.4.0 < 14.4.2 Search vendor "Gitlab" for product "Gitlab Runner" and version " >= 14.4.0 < 14.4.2"		-		Affected
Gitlab Search vendor "Gitlab"		Gitlab Runner Search vendor "Gitlab" for product "Gitlab Runner"				>= 14.5.0 < 14.5.2 Search vendor "Gitlab" for product "Gitlab Runner" and version " >= 14.5.0 < 14.5.2"		-		Affected