CVE-2024-13176

NameCVE-2024-13176
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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1094027

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssl (PTS)bullseye1.1.1w-0+deb11u1vulnerable
bullseye (security)1.1.1w-0+deb11u2vulnerable
bookworm3.0.15-1~deb12u1vulnerable
bookworm (security)3.0.14-1~deb12u2vulnerable
sid, trixie3.4.0-2vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensslsource(unstable)(unfixed)1094027

Notes

[bookworm] - openssl <no-dsa> (Minor issue)
[bullseye] - openssl <postponed> (Minor issue; can be fixed in next update)
https://openssl-library.org/news/secadv/20250120.txt
https://github.com/openssl/openssl/commit/77c608f4c8857e63e98e66444e2e761c9627916f (openssl-3.4.0)
https://github.com/openssl/openssl/commit/392dcb336405a0c94486aa6655057f59fd3a0902 (openssl-3.3.0)
https://github.com/openssl/openssl/commit/4b1cb94a734a7d4ec363ac0a215a25c181e11f65 (openssl-3.2.0)
https://github.com/openssl/openssl/commit/2af62e74fb59bc469506bc37eb2990ea408d9467 (openssl-3.1.0)
https://github.com/openssl/openssl/commit/07272b05b04836a762b4baa874958af51d513844 (openssl-3.0.0)

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