Resource exhaustion in containerd (Alpine package)

1) Resource exhaustion

EUVDB-ID: #VU22824

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11253

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation when processing YAML or JSON data in Kubernetes API server. A remote attacker can pass a malicious file to the API server and consume excessive memory and CPU resources, leading to a denial of service (DoS) attack.

Note, this vulnerability can be exploited by a remote non-authenticated attacker in Kubernetes versions prior to 1.14.0 due to default RBAC policy.

Mitigation

Install update from vendor's website.

Vulnerable software versions

containerd (Alpine package): 1.3.2-r0 - 1.3.2-r1

External links

http://git.alpinelinux.org/aports/commit/?id=c64d2552678a7126d5e1d18ac54ea0ee126298d9
http://git.alpinelinux.org/aports/commit/?id=3b2d519d19eed612aeaf0a62ee9003e23cbe7c2f

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.