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SonicWall SMA 100: CVE-2022-4304: Impact of OpenSSL Vulnerabilities Advisory Released On February 7, 2023

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SonicWall SMA 100: CVE-2022-4304: Impact of OpenSSL Vulnerabilities Advisory Released On February 7, 2023

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/08/2023
Created
04/04/2023
Added
04/03/2023
Modified
05/15/2023

Description

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.

Solution(s)

  • sonicwall-sma-100-upgrade-10_2_1_7-50

References

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