#VU28496 Improper Certificate Validation in ca-certificates (Ubuntu package)

Vulnerability identifier: #VU28496

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ca-certificates (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor: Canonical Ltd.

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to the ca-certificates package contains an expired CA certificate that causes connectivity issues and can be used during MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ca-certificates (Ubuntu package): 20180409ubuntu0.19.04.1 - 20190110

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External links
https://usn.ubuntu.com/4377-1/

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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.