Privilege escalation in Open Container runc
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-19921 |
| CWE-ID | CWE-284 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
runc Client/Desktop applications / Other client software |
| Vendor | Open Container Initiative |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper access control
EUVDB-ID: #VU25847
Risk: Low
CVSSv3.1: 6 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-19921
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain unauthorized access to sensitive information.
The vulnerability exists due to improper access restrictions, related to libcontainer/rootfs_linux.go in runc. A local user with ability to spawn two containers with custom volume-mount configurations, and run custom images can escalate privileges on the system.
Install update from vendor's website.
Vulnerable software versionsrunc: 1.0.0 rc1 - 1.0.0 rc9
External linkshttp://lists.opensuse.org/opensuse-security-announce/2020-02/msg00018.html
http://github.com/opencontainers/runc/issues/2197
http://github.com/opencontainers/runc/pull/2190
http://github.com/opencontainers/runc/releases
http://security-tracker.debian.org/tracker/CVE-2019-19921
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
