Vulnerability identifier: #VU51017

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20188

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Podman
Universal components / Libraries / Libraries used by multiple products

Vendor: Container Projects

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to file permissions for non-root users running in a privileged container are not correctly checked. A local low-privileged user inside the container can access arbitrary files in the container despite file  permissions, e.g. even files owned by the root user inside the container are accessible.

Successful exploitation of the vulnerability may allow a local user to escalate privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Podman: 1.0.0 - 1.6.5

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1915734

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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.