CVE-2023-1732 – github.com/cloudflare/circl

Package

Manager: go
Name: github.com/cloudflare/circl
Vulnerable Version: >=0 <1.3.3

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00192 pctl0.4129

Details

Improper random reading in CIRCL ### Impact 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. ### Patches The fix was introduced in CIRCL v. 1.3.3

Metadata

Created: 2023-05-11T20:40:54Z
Modified: 2023-05-24T18:31:42Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/05/GHSA-2q89-485c-9j2x/GHSA-2q89-485c-9j2x.json
CWE IDs: ["CWE-20", "CWE-755"]
Alternative ID: GHSA-2q89-485c-9j2x
Finding: F096
Auto approve: 1