CVE-2023-24533 — Multiplication of certain unreduced P-256 scalars produce incorrect results

Multiplication of certain unreduced P-256 scalars produce incorrect results. There are no protocols known at this time that can be attacked due to this.

01What is this vulnerability?

Multiplication of certain unreduced P-256 scalars produce incorrect results. There are no protocols known at this time that can be attacked due to this.

02Affected products

Vendor	Product	Versions
filippo.io	nistec / filippo.io/nistec	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-03-08T19:40:38.341Z
• Last modified: 2025-02-28T19:51:47.955Z

09References

• go.dev — https://go.dev/issue/58647
• github.com — https://github.com/FiloSottile/nistec/commit/c58aa1223ccf3943513e1e661cebce95af1…
• pkg.go.dev — https://pkg.go.dev/vuln/GO-2023-1595