Information disclosure in Jenkins MSTeams Webhook Trigger plugin

1) Information disclosure

EUVDB-ID: #VU82455

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:U/RL:U/RC:C]

CVE-ID: CVE-2023-46658

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected plugin does not use a constant-time comparison when checking whether the provided and expected webhook token are equal. A remote attacker can use statistical methods to obtain a valid webhook token.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MSTeams Webhook Trigger: 0.0.1 - 0.1.1

External links

http://www.openwall.com/lists/oss-security/2023/10/25/2
http://www.jenkins.io/security/advisory/2023-10-25/#SECURITY-2876

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.