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.
History

Sat, 19 Apr 2025 01:45:00 +0000

Type Values Removed Values Added
References

Thu, 17 Apr 2025 15:45:00 +0000

Type Values Removed Values Added
References

Tue, 18 Mar 2025 08:00:00 +0000

Type Values Removed Values 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. 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.

Mon, 27 Jan 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 4.1, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'}


Fri, 24 Jan 2025 20:45:00 +0000

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Tue, 21 Jan 2025 02:30:00 +0000

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Metrics threat_severity

None

cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

threat_severity

Low


Mon, 20 Jan 2025 17:45:00 +0000

Type Values Removed Values Added
References

Mon, 20 Jan 2025 13:45:00 +0000

Type Values Removed Values 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.
Title Timing side-channel in ECDSA signature computation
Weaknesses CWE-385
References

cve-icon MITRE

Status: PUBLISHED

Assigner: openssl

Published:

Updated: 2025-04-19T00:11:03.767Z

Reserved: 2025-01-07T09:34:54.572Z

Link: CVE-2024-13176

cve-icon Vulnrichment

Updated: 2025-04-19T00:11:03.767Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-01-20T14:15:26.247

Modified: 2025-04-19T01:15:43.007

Link: CVE-2024-13176

cve-icon Redhat

Severity : Low

Publid Date: 2025-01-20T13:29:57Z

Links: CVE-2024-13176 - Bugzilla