CVE-2021-22868

Unsafe configuration options in GitHub Pages leading to path traversal on GitHub Enterprise Server

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A path traversal vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to read files on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.1.8 and was fixed in 3.1.8, 3.0.16, and 2.22.22. This vulnerability was reported via the GitHub Bug Bounty program. This is the result of an incomplete fix for CVE-2021-22867.

Se Identificó una vulnerabilidad de salto de ruta en GitHub Enterprise Server que podría explotarse cuando se creaba un sitio de GitHub Pages. Las opciones de configuración controladas por el usuario usadas por GitHub Pages no estaban suficientemente restringidas y permitían leer archivos en la instancia de GitHub Enterprise Server. Para explotar esta vulnerabilidad, un atacante necesitaría permiso para crear y construir un sitio de GitHub Pages en la instancia de GitHub Enterprise Server. Esta vulnerabilidad afectaba a todas las versiones de GitHub Enterprise Server anteriores a 3.1.8 y fue corregida en las versiones 3.1.8, 3.0.16 y 2.22.22. Esta vulnerabilidad fue reportada por medio del programa GitHub Bug Bounty. Esto es el resultado de una corrección incompleta de CVE-2021-22867.

*Credits: yvvdwf

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-09-24 CVE Published
2023-11-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

CAPEC

References (3)

URL	Tag	Source
https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.22	X_refsource_misc
https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.16	X_refsource_misc
https://docs.github.com/en/enterprise-server%403.1/admin/release-notes#3.1.8	X_refsource_misc

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Github Search vendor "Github"		Enterprise Server Search vendor "Github" for product "Enterprise Server"				< 2.22.22 Search vendor "Github" for product "Enterprise Server" and version " < 2.22.22"		-		Affected
Github Search vendor "Github"		Enterprise Server Search vendor "Github" for product "Enterprise Server"				>= 3.0.0 < 3.0.16 Search vendor "Github" for product "Enterprise Server" and version " >= 3.0.0 < 3.0.16"		-		Affected
Github Search vendor "Github"		Enterprise Server Search vendor "Github" for product "Enterprise Server"				>= 3.1.0 < 3.1.8 Search vendor "Github" for product "Enterprise Server" and version " >= 3.1.0 < 3.1.8"		-		Affected