cve-2022-4304
Vulnerability from cvelistv5
Published
2023-02-08 19:04
Modified
2024-08-03 01:34
Severity ?
Summary
A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.
References
openssl-security@openssl.orghttps://security.gentoo.org/glsa/202402-08
openssl-security@openssl.orghttps://www.openssl.org/news/secadv/20230207.txtVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202402-08
af854a3a-2127-422b-91ae-364da2661108https://www.openssl.org/news/secadv/20230207.txtVendor Advisory
Impacted products
Vendor Product Version
Show details on NVD website

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