CVE-2024-14041
HIGH
8,2
Source: 91579145-5d7b-4cc5-b925-a0262ff19630
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
Description
AI Translation Available
In Bouncy Castle for Java from 1.73 to before 1.78, three ML-KEM (CRYSTALS-Kyber) routines divided secret-derived polynomial coefficients by the modulus q: Poly.toMsg, which decodes the decrypted message, and the ciphertext compression routines Poly.compressPoly and PolyVec.compressPolyVec. An attacker able to measure the timing of a large number of decapsulations performed with the same long-term private key can recover that key. These are the KyberSlash1 (Poly.toMsg) and KyberSlash2 (ciphertext compression) divisions. Compression performed during encapsulation operates on values that become the public ciphertext and is not affected.
208
Observable Timing Discrepancy
IncompleteCommon Consequences
Security Scopes Affected:
Confidentiality
Access Control
Potential Impacts:
Read Application Data
Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
https://github.com/bcgit/bc-java/commit/1590247178f2280defa36421475f015175dfbe9e
https://github.com/bcgit/bc-java/commit/5adb2c5c5b462a332b01a012bea0784b40b904e5
https://github.com/bcgit/bc-java/wiki/CVE-2024-14041
https://kyberslash.cr.yp.to/