CVE-2024-56141 Minosoft has IV equal to key
Minosoft Minecraft client uses the encryption key as the initialization vector, allowing attackers to recover the secret key via chosen-plaintext attacks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-56141?
CVE-2024-56141 is a medium-severity vulnerability in Bixilon Minosoft, published on 6 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Minosoft is an open-source, multi-version Minecraft Java Edition client written in Kotlin. Starting in commit f1ae30e2b046a490026a8413b075685deb795122, the CryptManager encryption routine ( CryptManager.kt ) initializes its AES cipher using an initialization vector (IV) that is set equal to the secret key rather than to a sufficiently random value. Because the IV is not random and is derived directly from the key, the encryption is vulnerable to chosen-ciphertext/chosen-plaintext attacks: an attacker who can submit specific messages for encryption can recover the secret key. This affects all versions supporting Minecraft protocol 1.7 and later. No patched version is available, and no known workarounds are available.
Weakness: CWE-329
Which versions are affected by CVE-2024-56141?
How do I fix CVE-2024-56141?
No fix has been published for CVE-2024-56141 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-56141 being exploited?
There is no known exploitation of CVE-2024-56141 in the wild and no public exploit code.
Sources
Also known as GHSA-rvr6-48rj-c94j.