CVE-2019-18837
An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check...
CVE-2019-18837 is a high vulnerability (CVSS 8.6) in Containers Crun, published November 13, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.42%, the 72nd percentile. No source names a fixed version.
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2019-18837- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-59
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2019-18837- Updated
- 2026-11-02
EUVDEUVD-2019-8538 No score
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.
- Record
EUVD-2019-8538- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-992m-xc3g-r7rj No score
An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check...
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.
- Record
GHSA-992m-xc3g-r7rj- Updated
- 2026-11-02
OSVBELL-CVE-2019-18837
CVE-2019-18837 does not affect BellSoft software
- Record
BELL-CVE-2019-18837- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-02
OSV
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.
- Record
CVE-2019-18837- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases, products | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
github.com/containers/crun/pull/173
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP
nvd.nist.gov/vuln/detail/CVE-2019-18837
docs.bell-sw.com/security/cves/CVE-2019-18837