CVE-2024-13176: Timing side-channel in ECDSA signature computation
First published: Mon Jan 20 2025(Updated: )
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.
Credit: openssl-security@openssl.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/openssl | <=1.1.1w-0+deb11u1<=1.1.1w-0+deb11u2<=3.0.15-1~deb12u1<=3.0.14-1~deb12u2 | 3.4.1-1 |
| OpenSSL |
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Reference Links
- https://github.com/openssl/openssl/commit/07272b05b04836a762b4baa874958af51d513844
- https://github.com/openssl/openssl/commit/2af62e74fb59bc469506bc37eb2990ea408d9467
- https://github.com/openssl/openssl/commit/392dcb336405a0c94486aa6655057f59fd3a0902
- https://github.com/openssl/openssl/commit/4b1cb94a734a7d4ec363ac0a215a25c181e11f65
- https://github.com/openssl/openssl/commit/77c608f4c8857e63e98e66444e2e761c9627916f
- https://github.openssl.org/openssl/extended-releases/commit/0d5fd1ab987f7571e2c955d8d8b638fc0fb54ded
- https://github.openssl.org/openssl/extended-releases/commit/a2639000db19878d5d89586ae7b725080592ae86
- https://openssl-library.org/news/secadv/20250120.txt
- http://www.openwall.com/lists/oss-security/2025/01/20/2
- https://security.netapp.com/advisory/ntap-20250124-0005/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-13176
- https://nvd.nist.gov/vuln/detail/CVE-2024-13176
- https://launchpad.net/bugs/cve/CVE-2024-13176
- https://security-tracker.debian.org/tracker/CVE-2024-13176
- https://ubuntu.com/security/CVE-2024-13176
Frequently Asked Questions
What is the severity of CVE-2024-13176?
CVE-2024-13176 is classified as a moderate severity vulnerability due to its potential to allow private key recovery.
How do I fix CVE-2024-13176?
To fix CVE-2024-13176, upgrade to the latest version of OpenSSL where the vulnerability has been addressed.
What types of systems are affected by CVE-2024-13176?
CVE-2024-13176 affects systems that utilize the ECDSA signature computation in OpenSSL.
What are the potential consequences of exploiting CVE-2024-13176?
Exploiting CVE-2024-13176 may allow an attacker to recover sensitive private keys, compromising secure communications.
Can CVE-2024-13176 be exploited remotely?
Yes, CVE-2024-13176 can potentially be exploited remotely if the vulnerable ECDSA signatures are accessible to an attacker.
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