Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Crun Project | Crun | < 0.10.5 |
| Fedoraproject | Fedora | 30 |
Related Weaknesses (CWE)
References
- 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%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- 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%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2019-18837?
CVE-2019-18837 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 lib...
How severe is CVE-2019-18837?
CVE-2019-18837 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-18837?
Check the references section above for vendor advisories and patch information. Affected products include: Crun Project Crun, Fedoraproject Fedora.