CVE-2024-56141: CWE-329: Generation of Predictable IV with CBC Mode in Bixilon Minosoft
Minosoft, an open-source Minecraft Java Edition client, uses an AES encryption routine that initializes its IV with the secret key instead of a random value. This predictable IV usage in CBC mode makes the encryption vulnerable to chosen-ciphertext and chosen-plaintext attacks, potentially allowing attackers to recover the secret key. This affects all versions supporting Minecraft protocol 1.7 and later. No patch or workaround is currently available.
AI Analysis
Technical Summary
The vulnerability in Minosoft arises from the CryptManager.kt encryption routine initializing the AES cipher's initialization vector (IV) to the secret key rather than a random value. This violates cryptographic best practices for CBC mode, where the IV must be unpredictable. Because the IV is predictable and directly derived from the key, attackers who can submit chosen plaintext or ciphertext can exploit this to recover the secret key. This affects all versions of Minosoft supporting Minecraft protocol 1.7 and later. No official fix or mitigation has been released as of the publication date.
Potential Impact
The predictable IV in CBC mode compromises the confidentiality and integrity of encrypted data by enabling attackers to perform chosen-ciphertext or chosen-plaintext attacks to recover the secret key. This undermines the encryption scheme's security, potentially exposing sensitive data encrypted by Minosoft clients. The CVSS score of 5 (medium) reflects limited attack complexity but significant confidentiality and integrity impact.
Mitigation Recommendations
No official patch or workaround is currently available for this vulnerability. Users should monitor the vendor's advisories for updates. Until a fix is released, avoid relying on Minosoft's encryption for sensitive data protection.
CVE-2024-56141: CWE-329: Generation of Predictable IV with CBC Mode in Bixilon Minosoft
Description
Minosoft, an open-source Minecraft Java Edition client, uses an AES encryption routine that initializes its IV with the secret key instead of a random value. This predictable IV usage in CBC mode makes the encryption vulnerable to chosen-ciphertext and chosen-plaintext attacks, potentially allowing attackers to recover the secret key. This affects all versions supporting Minecraft protocol 1.7 and later. No patch or workaround is currently available.
CVSS v3.1
Score 5.0medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Minosoft arises from the CryptManager.kt encryption routine initializing the AES cipher's initialization vector (IV) to the secret key rather than a random value. This violates cryptographic best practices for CBC mode, where the IV must be unpredictable. Because the IV is predictable and directly derived from the key, attackers who can submit chosen plaintext or ciphertext can exploit this to recover the secret key. This affects all versions of Minosoft supporting Minecraft protocol 1.7 and later. No official fix or mitigation has been released as of the publication date.
Potential Impact
The predictable IV in CBC mode compromises the confidentiality and integrity of encrypted data by enabling attackers to perform chosen-ciphertext or chosen-plaintext attacks to recover the secret key. This undermines the encryption scheme's security, potentially exposing sensitive data encrypted by Minosoft clients. The CVSS score of 5 (medium) reflects limited attack complexity but significant confidentiality and integrity impact.
Mitigation Recommendations
No official patch or workaround is currently available for this vulnerability. Users should monitor the vendor's advisories for updates. Until a fix is released, avoid relying on Minosoft's encryption for sensitive data protection.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2024-12-16T18:04:39.982Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4c3c1d27e9c797196d1e4a
Added to database: 07/06/2026, 23:37:01 UTC
Last enriched: 07/06/2026, 23:51:37 UTC
Last updated: 07/07/2026, 00:00:35 UTC
Views: 4
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