Bug 2291274 (CVE-2024-36405) - CVE-2024-36405 liboqs: leaks the entire ML-KEM 512 secret key
Summary: CVE-2024-36405 liboqs: leaks the entire ML-KEM 512 secret key
Keywords:
Status: NEW
Alias: CVE-2024-36405
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2291275
Blocks: 2291279
TreeView+ depends on / blocked
 
Reported: 2024-06-11 07:11 UTC by Rohit Keshri
Modified: 2024-06-11 11:39 UTC (History)
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A flaw was found in liboqs, a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A control-flow timing lean issue has been identified in the reference implementation of the Kyber key encapsulation mechanism when it is compiled with Clang 15-18 for `-Os`, `-O1`, and other compilation options. A proof-of-concept local attack on the reference implementation leaks the entire ML-KEM 512 secret key in ~10 minutes using end-to-end decapsulation timing measurements. The issue has been fixed in version 0.10.1. As a possible workaround, some compiler options may produce vectorized code that does not leak secret information. However, relying on these compiler options as a workaround may not be reliable.
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Description Rohit Keshri 2024-06-11 07:11:55 UTC
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A control-flow timing lean has been identified in the reference implementation of the Kyber key encapsulation mechanism when it is compiled with Clang 15-18 for `-Os`, `-O1`, and other compilation options. A proof-of-concept local attack on the reference implementation leaks the entire ML-KEM 512 secret key in ~10 minutes using end-to-end decapsulation timing measurements. The issue has been fixed in version 0.10.1. As a possible workaround, some compiler options may produce vectorized code that does not leak secret information, however relying on these compiler options as a workaround may not be reliable.

https://github.com/open-quantum-safe/liboqs/blob/7eecda6095c003ddded7175a1ffdf35a2ce63ed5/src/kem/kyber/pqcrystals-kyber_kyber512_ref/poly.c#L166
https://github.com/open-quantum-safe/liboqs/commit/982c762c242ef549c914891b47bf6e0ed6321f91
https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-f2v9-5498-2vpp
https://github.com/pq-crystals/kyber/commit/9b8d30698a3e7449aeb34e62339d4176f11e3c6c

Comment 1 Rohit Keshri 2024-06-11 07:12:22 UTC
Created liboqs tracking bugs for this issue:

Affects: fedora-all [bug 2291275]


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