Timing side-channel in ECDSA signature computation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-13176
StatePUBLISHED
Assigneropenssl
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-01-20 14:15:26 UTC
Updated2026-11-09 20:22:46 UTC
DescriptionIssue 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.

Risk And Classification

Primary CVSS: v3.1 4.6 MEDIUM from ADP

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

EPSS: 0.006440000 probability, percentile 0.511640000 (date 2026-11-08)

Problem Types: CWE-385 | CWE-385 CWE-385 Covert Timing Channel

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.6MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.6MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openssl Openssl All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenSSL OpenSSL affected 3.4.0 3.4.1 semver Not specified
CNA OpenSSL OpenSSL affected 3.3.0 3.3.3 semver Not specified
CNA OpenSSL OpenSSL affected 3.2.0 3.2.4 semver Not specified
CNA OpenSSL OpenSSL affected 3.1.0 3.1.8 semver Not specified
CNA OpenSSL OpenSSL affected 3.0.0 3.0.16 semver Not specified
CNA OpenSSL OpenSSL affected 1.1.1 1.1.1zb custom Not specified
CNA OpenSSL OpenSSL affected 1.0.2 1.0.2zl custom Not specified

References

ReferenceSourceLinkTags
github.com/openssl/openssl/commit/392dcb336405a0c94486aa6655057f59fd3a0902 [email protected] github.com Patch
security.netapp.com/advisory/ntap-20250418-0010 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
security.netapp.com/advisory/ntap-20250502-0006 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
github.com/openssl/openssl/commit/4b1cb94a734a7d4ec363ac0a215a25c181e11f65 [email protected] github.com Patch
lists.debian.org/debian-lts-announce/2025/05/msg00028.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
openssl-library.org/news/secadv/20250120.txt [email protected] openssl-library.org Vendor Advisory
github.com/openssl/openssl/commit/07272b05b04836a762b4baa874958af51d513844 [email protected] github.com Patch
github.openssl.org/openssl/extended-releases/commit/a2639000db19878d5d89586ae7b7... [email protected] github.openssl.org Permissions Required
github.com/openssl/openssl/commit/77c608f4c8857e63e98e66444e2e761c9627916f [email protected] github.com Patch
github.openssl.org/openssl/extended-releases/commit/0d5fd1ab987f7571e2c955d8d8b6... [email protected] github.openssl.org Permissions Required
security.netapp.com/advisory/ntap-20250124-0005 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
github.com/openssl/openssl/commit/2af62e74fb59bc469506bc37eb2990ea408d9467 [email protected] github.com Patch
www.openwall.com/lists/oss-security/2025/01/20/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: George Pantelakis (Red Hat) (en)

CNA: Alicja Kario (Red Hat) (en)

CNA: Tomáš Mráz (en)

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