Minosoft has IV equal to key

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Summary

CVECVE-2024-56141
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-07 00:16:33 UTC
Updated2026-07-08 20:16:46 UTC
DescriptionMinosoft 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.

Risk And Classification

Primary CVSS: v3.1 5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS: 0.001110000 probability, percentile 0.015780000 (date 2026-07-10)

Problem Types: CWE-329 | CWE-329 CWE-329: Generation of Predictable IV with CBC Mode

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED5MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Bixilon Minosoft affected >= f1ae30e2b046a490026a8413b075685deb795122 Not specified

References

ReferenceSourceLinkTags
github.com/Bixilon/Minosoft/blob/3a608abe2d0999e4e702cc1b2d28366884c7f31... [email protected] github.com
github.com/Bixilon/Minosoft/security/advisories/GHSA-rvr6-48rj-c94j [email protected] github.com
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