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CVE-2024-13176 – “Apache ECDSA Timing Key Disclosure Attack”

The following table lists the changes that have been made to the
CVE-2024-13176 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Jan. 20, 2025

    Action Type Old Value New Value
    Added Description Issue summary: A timing side-channel which could potentially allow recovering
    the private key exists in the ECDSA signature computation.

    Impact summary: A timing side-channel in ECDSA signature computations
    could allow recovering the private key by an attacker. However, measuring
    the timing would require either local access to the signing application or
    a very fast network connection with low latency.

    There is a timing signal of around 300 nanoseconds when the top word of
    the inverted ECDSA nonce value is zero. This can happen with significant
    probability only for some of the supported elliptic curves. In particular
    the NIST P-521 curve is affected. To be able to measure this leak, the attacker
    process must either be located in the same physical computer or must
    have a very fast network connection with low latency. For that reason
    the severity of this vulnerability is Low.
    Added CWE CWE-385
    Added Reference https://github.com/openssl/openssl/commit/07272b05b04836a762b4baa874958af51d513844
    Added Reference https://github.com/openssl/openssl/commit/2af62e74fb59bc469506bc37eb2990ea408d9467
    Added Reference https://github.com/openssl/openssl/commit/392dcb336405a0c94486aa6655057f59fd3a0902
    Added Reference https://github.com/openssl/openssl/commit/4b1cb94a734a7d4ec363ac0a215a25c181e11f65
    Added Reference https://github.com/openssl/openssl/commit/77c608f4c8857e63e98e66444e2e761c9627916f
    Added Reference https://github.openssl.org/openssl/extended-releases/commit/0d5fd1ab987f7571e2c955d8d8b638fc0fb54ded
    Added Reference https://github.openssl.org/openssl/extended-releases/commit/a2639000db19878d5d89586ae7b725080592ae86
    Added Reference https://openssl-library.org/news/secadv/20250120.txt
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