#VU78763 Reusing a Nonce, Key Pair in Encryption in Discourse - CVE-2023-37467

Vulnerability identifier: #VU78763

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-37467

CWE-ID: CWE-323

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Discourse
Web applications / Forum & blogging software

Vendor: Civilized Discourse Construction Kit, Inc.

Description

The vulnerability allows a remote attacker to compromise the target system. 

The vulnerability exists due to the CSP (Content Security Policy) nonce reuse issue. A remote user can bypass CSP protection. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.1.0 beta6

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External links
https://github.com/discourse/discourse/commit/0976c8fad6970b6182e7837bf87de07709407f25
https://github.com/discourse/discourse/security/advisories/GHSA-gr5h-hm62-jr3j

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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.