#VU74193 Improper Preservation of Permissions in runc - CVE-2023-28642

Vulnerability identifier: #VU74193

Vulnerability risk: Medium

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-28642

CWE-ID: CWE-281

Exploitation vector: Network

Exploit availability: No

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

Vendor: Open Container Initiative

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper preservation of permissions in the AppArmor and SELinux when /proc inside the container is symlinked with a specific mount configuration. A remote attacker can gain access to the target application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

runc: 1.0 rc1 - 1.1.4

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External links
https://github.com/opencontainers/runc/security/advisories/GHSA-g2j6-57v7-gm8c
https://github.com/opencontainers/runc/pull/3785

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.