CVE-2022-29162

Incorrect Default Permissions in runc

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. A bug was found in runc prior to version 1.1.2 where `runc exec --cap` created processes with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during execve(2). This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container's bounding set. This bug has been fixed in runc 1.1.2. This fix changes `runc exec --cap` behavior such that the additional capabilities granted to the process being executed (as specified via `--cap` arguments) do not include inheritable capabilities. In addition, `runc spec` is changed to not set any inheritable capabilities in the created example OCI spec (`config.json`) file.

runc es una herramienta CLI para generar y ejecutar contenedores en Linux según la especificación OCI. Se encontró un bug en runc versiones anteriores a 1.1.2 en el que "runc exec --cap" creaba procesos con capacidades de proceso heredables de Linux no vacías, creando un entorno Linux atípico y permitiendo a programas con capacidades de archivo heredables elevar esas capacidades al conjunto permitido durante execve(2). Este error no afectaba al sandbox de seguridad del contenedor, ya que el conjunto heredable nunca contenía más capacidades que las incluidas en el conjunto delimitador del contenedor. Este error ha sido corregido en runc versión 1.1.2. Esta corrección cambia el comportamiento de "runc exec --cap" de forma que las capacidades adicionales concedidas al proceso que está siendo ejecutando (especificadas por medio de los argumentos "--cap") no incluyen las capacidades heredables. Además, "runc spec" ha sido modificado para que no establezca ninguna capacidad heredable en el archivo de especificaciones OCI de ejemplo creado ("config.json')

A flaw was found in runc, where runc exec --cap executed processes with non-empty inheritable Linux process capabilities. This issue creates an atypical Linux environment and enables programs with inheritable file capabilities to elevate those capabilities to the permitted set during execve(2).

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-04-13 CVE Reserved
2022-05-17 CVE Published
2023-08-22 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-276: Incorrect Default Permissions

CAPEC

References (9)

URL	Tag	Source
https://github.com/opencontainers/runc/releases/tag/v1.1.2	Release Notes
https://github.com/opencontainers/runc/security/advisories/GHSA-f3fp-gc8g-vw66	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/opencontainers/runc/commit/d04de3a9b72d7a2455c1885fc75eb36d02cd17b5	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AVPZBV7ISA7QKRPTC7ZXWKMIQI2HZEBB	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D77CKD3AXPMU4PMQIQI5Q74SI4JATNND	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GPQU4YC4AAY54JDXGDQHJEYKSXXG5T2Y	2023-11-07
https://access.redhat.com/security/cve/CVE-2022-29162	2022-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=2086398	2022-11-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linuxfoundation Search vendor "Linuxfoundation"		Runc Search vendor "Linuxfoundation" for product "Runc"				< 1.1.2 Search vendor "Linuxfoundation" for product "Runc" and version " < 1.1.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				36 Search vendor "Fedoraproject" for product "Fedora" and version "36"		-		Affected