CVE-2019-18837 Information

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.

CVSS Vector

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

Reference

https://github.com/containers/crun/pull/173 https://github.com/containers/crun/releases/tag/0.10.5 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

8.6