CVE-2023-4421

CVSS 3.1 Score 6.5 of 10 (medium)

Details

Published Dec 12, 2023
Updated: Dec 20, 2023
CWE ID 203

Summary

CVE-2023-4421 is a cyber vulnerability that affects NSS, a cryptographic library used in various products. The vulnerability allows attackers to decrypt intercepted PKCS#1 v1.5 ciphertexts or forge signatures using the victim's key. The issue arises from the leakage of information through a timing side-channel, exposing both the correctness of the padding and the length of the encrypted message. To remediate this vulnerability, NSS version 3.61 or higher should be implemented, as it incorporates an implicit rejection algorithm that returns a deterministic random message when invalid padding is detected. This vulnerability poses a medium risk to organizations, with a base severity score of 6.5 and a high confidentiality impact.

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