#VU53399 Security features bypass in runc - CVE-2021-30465

Vulnerability identifier: #VU53399

Vulnerability risk: Low

CVSSv4.0: 4.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-30465

CWE-ID: CWE-254

Exploitation vector: Local 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 the security features bypass issue. A remote authenticated attacker on the local network can perform a symlink exchange attack and host filesystem being bind-mounted into the container.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

runc: 1.0.0 rc94

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External links
https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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