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FreeBSD: (Multiple Advisories) (CVE-2022-4304): FreeBSD -- Multiple vulnerabilities in OpenSSL

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FreeBSD: (Multiple Advisories) (CVE-2022-4304): FreeBSD -- Multiple vulnerabilities in OpenSSL



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.


  • freebsd-upgrade-base-12_3-release-p12
  • freebsd-upgrade-base-12_4-release-p2
  • freebsd-upgrade-base-13_1-release-p7
  • freebsd-upgrade-package-openssl
  • freebsd-upgrade-package-openssl-devel
  • freebsd-upgrade-package-openssl-quictls

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