CVE-2019-18837

HIGH

crun < 0.10.5 - Improper Link Resolution Before File Access

Title source: llm

Description

An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check whether a target is a symlink, resulting in access to files outside of the container. This occurs in libcrun/linux.c and libcrun/chroot_realpath.c.

References (4)

Core 4

Core References

Mailing List, Third Party Advisory x_refsource_misc

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/

Mailing List, Third Party Advisory x_refsource_misc

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/

Issue Tracking x_refsource_misc

https://github.com/containers/crun/pull/173

Release Notes x_refsource_confirm

https://github.com/containers/crun/releases/tag/0.10.5

Scores

CVSS v3 8.6

EPSS 0.0142

EPSS Percentile 69.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Details

CWE

CWE-59

Status published

Products (3)

crun_project/crun < 0.10.5

fedoraproject/fedora 30

fedoraproject/fedora 31

Published Nov 13, 2019

Tracked Since Feb 18, 2026