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Vulnerability record · CVE-2024-13176 · published 20 January 2025

CVE-2024-13176: Openssl vulnerability

OOpenssl · Openssl

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.

4.6 CVSS 3.1 Medium EPSS 0.75% · top 44.5% CWE-385 · CWE-385
4.6CVSS 3.1 base score
0.75%EPSS exploitation probability, 30 days
NoNot in CISA KEV
30Affected product versions listed by NVD
13References
9 Nov 2026Last modified by NVD

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.

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

30 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/openssl/openssl/commit/07272b05b04836a762b4baa874958af51d513844 Patch
https://github.com/openssl/openssl/commit/2af62e74fb59bc469506bc37eb2990ea408d9467 Patch
https://github.com/openssl/openssl/commit/392dcb336405a0c94486aa6655057f59fd3a0902 Patch
https://github.com/openssl/openssl/commit/4b1cb94a734a7d4ec363ac0a215a25c181e11f65 Patch
https://github.com/openssl/openssl/commit/77c608f4c8857e63e98e66444e2e761c9627916f Patch
https://github.openssl.org/openssl/extended-releases/commit/0d5fd1ab987f7571e2c955d8d8b638fc0fb54ded Permissions Required
https://github.openssl.org/openssl/extended-releases/commit/a2639000db19878d5d89586ae7b725080592ae86 Permissions Required
https://openssl-library.org/news/secadv/20250120.txt Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/01/20/2 Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00028.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20250124-0005/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20250418-0010/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20250502-0006/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2024-13176), CISA KEV, FIRST EPSS (scores of 2026-11-13). This page is refreshed as NVD updates the record.