CVE-2022-23003

Shared secret or Point multiplication of NIST P-256 points with X coordinate of zero

Published Jul 29, 2022 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

When computing a shared secret or point multiplication on the NIST P-256 curve that results in an X coordinate of zero, the resulting output is not properly reduced modulo the P-256 field prime and is invalid. The resulting output may cause an error when used in other operations. This may be leveraged by an attacker to cause an error scenario or incorrect choice of session key in applications which use the library, resulting in a limited denial of service for an individual user. The scope of impact cannot extend to other components.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Western Digital

Sweet B Library

affected

Version	Status	Constraints
`unspecified`	affected	< v2

Configuration 1 [-]

cpe:2.3:a:westerndigital:sweet_b:1:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

The vulnerability was addressed by fully reducing the output modulo the field prime. To get the latest version of the Sweet B library, update your local repository from https://github.com/westerndigitalcorporation/sweet-b

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2022-28114	When computing a shared secret or point multiplication on the NIST P-256 curve that results in an X coordinate of zero, the resulting output is not properly reduced modulo the P-256 field prime and is invalid. The resulting output may cause an error when used in other operations. This may be leveraged by an attacker to cause an error scenario or incorrect choice of session key in applications which use the library, resulting in a limited denial of service for an individual user. The scope of impact cannot extend to other components.