An issue was discovered in Croc before 9.6.16. When a custom shared secret is used, the sender and receiver may divulge parts of this secret to an untrusted Relay, as part of composing a room name.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-43617
• schollz/croc#596
• https://www.openwall.com/lists/oss-security/2023/09/08/2
• http://www.openwall.com/lists/oss-security/2023/09/21/5
• schollz/croc#699
• schollz/croc@0f1ca43