#VU50274 Resource exhaustion in Docker - CVE-2021-21285

Vulnerability identifier: #VU50274

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-21285

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Docker
Server applications / Virtualization software

Vendor: Docker Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trick a victim to pull a specially crafted Docker image, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Docker: before 19.03.15

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External links
https://docs.docker.com/engine/release-notes/#20103
https://github.com/moby/moby/commit/8d3179546e79065adefa67cc697c09d0ab137d30
https://github.com/moby/moby/releases/tag/v19.03.15
https://github.com/moby/moby/releases/tag/v20.10.3
https://github.com/moby/moby/security/advisories/GHSA-6fj5-m822-rqx8

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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.