High severity · published Nov 13, 2019
CVE-2019-18837
An issue was discovered in crun before 0.10.5
8.6
CVSS
1.4%
EPSS
No
On KEV
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
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
Crun · Crun Project
before 0.10.5 · source: NVD
FE
Fedora · Fedoraproject
30; 31 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18837
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18837
github.com
https://github.com/containers/crun/pull/173
github.com
https://github.com/containers/crun/releases/tag/0.10.5
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/
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