#VU74190 Improper access control in runc - CVE-2023-27561

Vulnerability identifier: #VU74190

Vulnerability risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-27561

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
runc
Client/Desktop applications / Other client software

Vendor: Open Container Initiative

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to improper access restrictions in the libcontainer/rootfs_linux.go. A local user can gain elevated privileges on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

runc: 1.0.0 rc95 - 1.1.4

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External links
https://github.com/opencontainers/runc/issues/3751
https://gist.github.com/LiveOverflow/c937820b688922eb127fb760ce06dab9
https://github.com/opencontainers/runc/issues/2197#issuecomment-1437617334
https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html
https://github.com/advisories/GHSA-vpvm-3wq2-2wvm

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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.