Vulnerability Monitor

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CVE-2019-18837

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.

Published

2019-11-13T20:15:10.940

Last Modified

2024-11-21T04:33:40.990

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-59

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	crun_project	crun	< 0.10.5	Yes
Operating System	fedoraproject	fedora	30	Yes
Operating System	fedoraproject	fedora	31	Yes

References

https://github.com/containers/crun/pull/173 ([email protected])
https://github.com/containers/crun/releases/tag/0.10.5 ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/ ([email protected])
https://github.com/containers/crun/pull/173 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/containers/crun/releases/tag/0.10.5 (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/ (af854a3a-2127-422b-91ae-364da2661108)