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rhonabwy

In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel attacks, because it stops the comparison when the first difference is spotted in the two signatures. (The fix uses gnutls_memcmp, which has constant-time execution.)

CVE-2024-25714 identifies a critical cryptographic vulnerability in the Rhonabwy software up to version 1.1.13. The core issue lies in the use of the standard strcmp function for HMAC signature verification. strcmp performs a byte-by-byte comparison and returns immediately upon detecting the first difference between two strings. This behavior introduces a timing side-channel vulnerability because the time taken to compare two signatures varies depending on how many initial bytes match. An attacker can exploit this timing discrepancy to gradually infer the correct HMAC signature by measuring response times, effectively enabling key recovery or signature forgery. The vulnerability compromises both confidentiality and integrity of the cryptographic process. The fix involves replacing strcmp with gnutls_memcmp, a function designed to execute in constant time regardless of input, thereby eliminating timing leaks. The CVSS v3.1 score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) indicates that the vulnerability is remotely exploitable without authentication or user interaction and results in high confidentiality and integrity impact, but no availability impact. No known exploits have been observed in the wild yet, but the vulnerability is severe due to the fundamental cryptographic weakness it exposes. The CWE-1255 classification relates to side-channel timing attacks on cryptographic operations. Organizations using Rhonabwy for secure communications or cryptographic validation should prioritize patching or applying mitigations to prevent exploitation.

Detailed information about CVE-2024-25714: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2024-25714: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2024-25714: n/a

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