Vulnerability identifier: #VU17255

Vulnerability risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-3818

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
kube-rbac-proxy
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Frederic Branczyk

Description

The vulnerability allows a remote attacker to conduct man-in-the-middle attack.

The vulnerability exists due to improper validation of the X.509 certificates. A remote attacker can conduct MITM-attack and obtain potentially sensitive information or impersonate trusted servers, which will aid in further attacks.

Mitigation
Update to version 0.4.1.

Vulnerable software versions

kube-rbac-proxy: 0.1.0 - 0.4.0

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1668961
http://github.com/brancz/kube-rbac-proxy/pull/27/files

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