PT-2019-15691 · Crun Team+1 · Crun+1

Published 2019-11-13 · Updated 2019-12-13 · CVE-2019-18837

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions crun versions prior to 0.10.5

Description An issue was discovered in crun where it doesn't correctly check whether a target is a symlink when a crafted image is used, resulting in access to files outside of the container. This issue is related to the libcrun/linux.c and libcrun/chroot realpath.c files.

Recommendations For versions prior to 0.10.5, update to version 0.10.5 or later to resolve the issue. As a temporary workaround, consider restricting access to crafted images to minimize the risk of exploitation.

Fix

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

ALT-PU-2019-3271

ALT-PU-2019-3284

CVE-2019-18837

Affected Products

Alt Linux

Crun

References · 6

• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-18837 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-18837 · Vendor Advisory
• https://github.com/containers/crun/pull/173 · Note
• https://github.com/containers/crun/releases/tag/0.10.5 · Note