CVE-2023-1732
CVSS V2 None
CVSS V3 None
Description
When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret.
The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.
Overview
- CVE ID
- CVE-2023-1732
- Assigner
- cna@cloudflare.com
- Vulnerability Status
- Received
- Published Version
- 2023-05-10T12:15:10
- Last Modified Date
- 2023-05-10T12:15:10
Weakness Enumerations
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2023-1732 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1732 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2023-05-10 13:00:37 | Added to TrackCVE | |||
| 2023-05-10 13:00:39 | Weakness Enumeration | new |