medium
5.9
Advisory Published
Updated

F5-K000132943

First published: Mon Mar 13 2023(Updated: )

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. (CVE-2022-4304 )

Affected SoftwareAffected VersionHow to fix
F5 BIG-IP and BIG-IQ Centralized Management>=17.0.0<=17.1.0
17.1.117.1.0.1
F5 BIG-IP and BIG-IQ Centralized Management>=16.1.0<=16.1.4
16.1.5
F5 BIG-IP and BIG-IQ Centralized Management>=15.1.0<=15.1.9
15.1.10
F5 BIG-IP and BIG-IQ Centralized Management>=14.1.0<=14.1.5
F5 BIG-IP and BIG-IQ Centralized Management>=13.1.0<=13.1.5
F5 BIG-IP Next>=1.5.0<=1.7.1
F5 BIG-IP and BIG-IQ Centralized Management>=8.0.0<=8.3.0
F5 BIG-IP and BIG-IQ Centralized Management=7.1.0
F5 F5OS=1.3.1
F5 Traffix Systems Signaling Delivery Controller=5.2.0

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Reference Links

Frequently Asked Questions

  • What is the severity of F5-K000132943?

    The severity of F5-K000132943 is classified as critical due to its potential for successful information recovery through a timing-based attack.

  • How do I fix F5-K000132943?

    To fix F5-K000132943, upgrade affected F5 BIG-IP and other related products to their respective patched versions detailed in the advisory.

  • Which versions of F5 products are affected by F5-K000132943?

    F5-K000132943 affects multiple F5 BIG-IP versions from 14.1 to 17.1, along with BIG-IQ, F5OS-A, and Traffix SDC product lines.

  • What type of attack does F5-K000132943 enable?

    F5-K000132943 allows attackers to perform a Bleichenbacher style attack, potentially leading to plaintext recovery over the network.

  • Is there a workaround for F5-K000132943?

    There are no documented workarounds for F5-K000132943, and upgrading to a secure version is the recommended action.

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