Riskcovery

CVE-2024-13176

Timing side-channel in ECDSA signature computation

State
Published
Severity
4.1 Medium
Published
Jan 20, 2025
Updated
Mar 18, 2026
Reserved
Jan 7, 2025

Read the record on cve.org

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.

The FIPS modules in 3.4, 3.3, 3.2, 3.1 and 3.0 are affected by this issue.

Scores

CVSSScoreVectorSource
3.14.1 MediumCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:LCISA-ADP

Weaknesses

Affected Products

ProductVersions
OpenSSLOpenSSL
  • 3.4.0 to before 3.4.1Affected
  • 3.3.0 to before 3.3.3Affected
  • 3.2.0 to before 3.2.4Affected
  • 3.1.0 to before 3.1.8Affected
  • 3.0.0 to before 3.0.16Affected
  • 1.1.1 to before 1.1.1zbAffected
  • 1.0.2 to before 1.0.2zlAffected

References

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