Information Exposure Affecting edk2-ovmf package, versions <0:20221207gitfff6d81270b5-9.el9_2
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Test your applications- Snyk ID SNYK-ALMALINUX9-EDK2OVMF-5659299
- published 28 May 2023
- disclosed 28 Feb 2023
Introduced: 28 Feb 2023
CVE-2022-4304 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 edk2-ovmf to version 0:20221207gitfff6d81270b5-9.el9_2 or higher.
This issue was patched in ALSA-2023:2165.
NVD Description
Note: Versions mentioned in the description apply only to the upstream edk2-ovmf package and not the edk2-ovmf package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 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.
References
- https://errata.almalinux.org/9/ALSA-2023-0946.html
- https://errata.almalinux.org/8/ALSA-2023-1405.html
- https://errata.almalinux.org/9/ALSA-2023-2165.html
- https://errata.almalinux.org/8/ALSA-2023-2932.html
- https://access.redhat.com/security/cve/CVE-2022-4304
- https://access.redhat.com/errata/RHSA-2023:0946
- https://access.redhat.com/errata/RHSA-2023:1405
- https://access.redhat.com/errata/RHSA-2023:2165
- https://access.redhat.com/errata/RHSA-2023:2932
- https://www.openssl.org/news/secadv/20230207.txt
- https://security.gentoo.org/glsa/202402-08