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CVE-2024-21626

Publication date 31 January 2024

Last updated 24 July 2024

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

8.6 · High

Score breakdown

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.

Read the notes from the security team

Why is this CVE high priority?

Allows an attacker to escape containers

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
runc 24.04 LTS noble
Not affected
23.10 mantic
Fixed 1.1.7-0ubuntu2.2
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Fixed 1.1.7-0ubuntu1~22.04.2
20.04 LTS focal
Fixed 1.1.7-0ubuntu1~20.04.2
18.04 LTS bionic
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored end of standard support

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Notes

0xnishit

affected versions >=v1.0.0-rc93,<=1.1.11

Severity score breakdown

Parameter Value
Base score 8.6 · High
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references