CVE-2022-23002: Point Compression/Decompression of NIST P-256 points with X coordinate of zero
First published: Fri Jul 29 2022(Updated: )
When compressing or decompressing a point on the NIST P-256 elliptic curve with an X coordinate of zero, the resulting output is not properly reduced modulo the P-256 field prime and is invalid. The resulting output will cause an error when used in other operations. This may be leveraged by an attacker to cause an error scenario 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.
Credit: psirt@wdc.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Westerndigital Sweet B | =1 |
Remedy
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
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2022-23002.
What is the severity level of CVE-2022-23002?
The severity level of CVE-2022-23002 is medium with a score of 5.3.
Which software is affected by CVE-2022-23002?
The Western Digital Sweet B software version 1 is affected by CVE-2022-23002.
What is the impact of the vulnerability?
The vulnerability may lead to errors when compressing or decompressing a point on the NIST P-256 elliptic curve with an X coordinate of zero, potentially enabling an attacker to leverage it for malicious purposes.
Is there a fix available for CVE-2022-23002?
Yes, Western Digital has released a fix for the CVE-2022-23002 vulnerability. Please refer to the vendor's website for more information.
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