Information Exposure Affecting libopenssl1_0_0 package, versions <1.0.2p-150000.3.65.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.18% (55th percentile)

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  • Snyk IDSNYK-SLES151-LIBOPENSSL100-6592041
  • published8 Apr 2024
  • disclosed7 Feb 2023

Introduced: 7 Feb 2023

CVE-2022-4304  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade SLES:15.1 libopenssl1_0_0 to version 1.0.2p-150000.3.65.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libopenssl1_0_0 package and not the libopenssl1_0_0 package as distributed by SLES. See How to fix? for SLES:15.1 relevant fixed versions and status.

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.

CVSS Scores

version 3.1