Vulnerability identifier: #VU34359

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-2023

CWE-ID: CWE-269

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Runtime
Server applications / Virtualization software

Vendor: Kata Containers

Description

The vulnerability allows a local authenticated user to read and manipulate data.

Kata Containers doesn't restrict containers from accessing the guest's root filesystem device. Malicious containers can exploit this to gain code execution on the guest and masquerade as the kata-agent. This issue affects Kata Containers 1.11 versions earlier than 1.11.1; Kata Containers 1.10 versions earlier than 1.10.5; and Kata Containers 1.9 and earlier versions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Runtime: 1.11.0

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External links
http://github.com/kata-containers/agent/issues/791
http://github.com/kata-containers/agent/pull/792
http://github.com/kata-containers/runtime/issues/2488
http://github.com/kata-containers/runtime/pull/2477
http://github.com/kata-containers/runtime/pull/2487
http://github.com/kata-containers/runtime/releases/tag/1.10.5
http://github.com/kata-containers/runtime/releases/tag/1.11.1

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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. However, proof of concept for this vulnerability is available.