CVE-2023-6395

Mock: privilege escalation for users that can access mock configuration

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

The Mock software contains a vulnerability wherein an attacker could potentially exploit privilege escalation, enabling the execution of arbitrary code with root user privileges. This weakness stems from the absence of proper sandboxing during the expansion and execution of Jinja2 templates, which may be included in certain configuration parameters. While the Mock documentation advises treating users added to the mock group as privileged, certain build systems invoking mock on behalf of users might inadvertently permit less privileged users to define configuration tags. These tags could then be passed as parameters to mock during execution, potentially leading to the utilization of Jinja2 templates for remote privilege escalation and the execution of arbitrary code as the root user on the build server.

El software Mock contiene una vulnerabilidad en la que un atacante podría explotar la escalada de privilegios, permitiendo la ejecución de código arbitrario con privilegios de usuario root. Esta debilidad se debe a la ausencia de una sandbox adecuada durante la expansión y ejecución de las plantillas de Jinja2, que pueden incluirse en ciertos parámetros de configuración. Si bien la documentación de Mock recomienda tratar a los usuarios agregados al grupo simulado como privilegiados, ciertos sistemas de compilación que invocan simulacros en nombre de los usuarios podrían permitir sin darse cuenta que usuarios con menos privilegios definan etiquetas de configuración. Luego, estas etiquetas podrían pasarse como parámetros para simular durante la ejecución, lo que podría llevar a la utilización de plantillas Jinja2 para la escalada remota de privilegios y la ejecución de código arbitrario como usuario raíz en el servidor de compilación.

*Credits: Red Hat would like to thank Sankin Nikita Alexeevich for reporting this issue.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2023-11-30 CVE Reserved
2024-01-16 CVE Published
2024-10-25 CVE Updated
2024-10-25 First Exploit
2024-10-26 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation
CWE-94: Improper Control of Generation of Code ('Code Injection')

CAPEC

References (8)

URL	Tag	Source
https://access.redhat.com/security/cve/CVE-2023-6395	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2252206	Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/62SP2BJC2AFLFJJAEHPGZ3ZINTBTI7AN
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NBFYREAJH4T7GXXQZ4GJEREN4Q3AHS3K

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2024/01/16/3	2024-10-25

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2024/01/16/1	2024-02-09
https://github.com/xsuchy/templated-dictionary/commit/0740bd0ca8d487301881541028977d120f8b8933	2024-02-09
https://github.com/xsuchy/templated-dictionary/commit/bcd90f0dafa365575c4b101e6f5d98c4ef4e4b69	2024-02-09

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rpm-software-management Search vendor "Rpm-software-management"		Mock Search vendor "Rpm-software-management" for product "Mock"				-		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Extra Packages For Enterprise Linux Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux"				7.0 Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" and version "7.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Extra Packages For Enterprise Linux Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux"				8.0 Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" and version "8.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Extra Packages For Enterprise Linux Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux"				9.0 Search vendor "Fedoraproject" for product "Extra Packages For Enterprise Linux" and version "9.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected