PT-2023-19679 · Filippo.Io/Nistec+3 · Filippo.Io/Nistec+1

Guido Vranken · Published 2023-02-28 · Updated 2023-03-15 · CVE-2023-24533

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions No specific software or versions are mentioned in the provided descriptions.

Description The issue concerns the multiplication of certain unreduced P-256 scalars, which can produce incorrect results. However, there are no known protocols that can be attacked due to this issue. The problem arises because the P-256 assembly does not use complete addition formulas, which can lead to incorrect results when the two inputs are equal. This was previously mitigated by always reducing the scalar, but a change in the math/big rewrite removed this reduction, assuming it was not necessary.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-682

Related Identifiers

CVE-2023-24533

GHSA-F6HC-9G49-XMX7

GO-2023-1595

Affected Products

Filippo.Io/Nistec

Nistec

References · 9

• https://github.com/FiloSottile/nistec/commit/c58aa1223ccf3943513e1e661cebce95af137244 · Patch
• https://osv.dev/vulnerability/CVE-2023-24533 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-24533 · Security Note
• https://osv.dev/vulnerability/GO-2023-1595 · Vendor Advisory
• https://go.dev/issue/58647 · Patch
• https://osv.dev/vulnerability/GHSA-f6hc-9g49-xmx7 · Vendor Advisory
• https://github.com/FiloSottile/nistec · Note
• https://t.me/cibsecurity/59693 · Telegram Post
• https://pkg.go.dev/vuln/GO-2023-1595 · Note