Vulnerability identifier: #VU22261

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1003026

CWE-ID: CWE-918

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mattermost Notification
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The disclosed vulnerability allows a remote user to perform SSRF attacks.

The vulnerability exists due to missing permission check in a form validation method. A remote authenticated user with Overall/Read permission can send a specially crafted HTTP request and connect Jenkins to an attacker-specified Mattermost server and room and send a message.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mattermost Notification: 1.0 - 2.6.2

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External links
http://jenkins.io/security/advisory/2019-02-19/#SECURITY-985

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.