Information Exposure Affecting nss package, versions *
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Test your applications- Snyk ID SNYK-CENTOS6-NSS-5898954
- published 13 Sep 2023
- disclosed 13 Sep 2023
Introduced: 13 Sep 2023
CVE-2023-4421 Open this link in a new tabHow to fix?
There is no fixed version for Centos:6 nss.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nss package and not the nss package as distributed by Centos.
See How to fix? for Centos:6 relevant fixed versions and status.
The NSS code used for checking PKCS#1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks. Both the overall correctness of the padding as well as the length of the encrypted message was leaking through timing side-channel. By sending large number of attacker-selected ciphertexts, the attacker would be able to decrypt a previously intercepted PKCS#1 v1.5 ciphertext (for example, to decrypt a TLS session that used RSA key exchange), or forge a signature using the victim's key. The issue was fixed by implementing the implicit rejection algorithm, in which the NSS returns a deterministic random message in case invalid padding is detected, as proposed in the Marvin Attack paper. This vulnerability affects NSS < 3.61.