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CVE-2023-1732 PUBLISHED CVSS 5.3 MEDIUM

Reported by cloudflare · Published May 10, 2023

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.

Risk Scores

CVSS v3.1
5.3
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

Affected Products

VendorProductVersions
CloudflareCIRCL0
chainguardpulumi-language-java0
wolfitekton-pipelines*, *, *
github.comcloudflare/circl0, 0
CloudflareCIRCL0, 0
chainguardkyverno-1.80
chainguardtekton-pipelines*
chainguardflux-0*, *, *
chainguardaactl0, 0, 0
wolfipulumi-language-java0, 0, 0
wolfiaactl0, 0, 0

Timeline

References

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