#VU93786 Server-Side Request Forgery (SSRF) in Discourse - CVE-2024-37157

Vulnerability identifier: #VU93786

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-37157

CWE-ID: CWE-918

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Discourse
Web applications / Forum & blogging software

Vendor: Civilized Discourse Construction Kit, Inc.

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within FastImage. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

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

Discourse: 3.2.0 beta1 - 3.3.0 beta3

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External links
https://github.com/discourse/discourse/security/advisories/GHSA-46pq-7958-fc68
https://github.com/discourse/discourse/commit/5b8cf11b69e05d5c058c1148ec69ec309491fa6e
https://github.com/discourse/discourse/commit/67e78086035cec494b15ce79342a0cb9052c2d95

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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.