Security Bulletin: AIX is vulnerable to information disclosure due to openCryptoki (CVE-2024-0914)

Summary

Vulnerability in openCryptoki could allow a remote attacker to obtain sensitive information (CVE-2024-0914).

Vulnerability Details

CVEID:CVE-2024-0914
**DESCRIPTION:**openCryptoki could allow a remote attacker to obtain sensitive information, caused by a flaw when processing RSA PKCS#1 v1.5 padded ciphertexts. By utilize timing side-channel attack techniques, an attacker could exploit this vulnerability to obtain RSA ciphertext information, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/281283 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

The vulnerabilities in the following filesets are being addressed:

To find out whether the affected filesets are installed on your systems, refer to the lslpp command found in AIX user’s guide.

Example: lslpp -L | grep -i opencki.base

Remediation/Fixes

FIXES

IBM strongly recommends addressing the vulnerability now.

A fix is available, and it can be downloaded from:

https://www.ibm.com/resources/mrs/assets?source=aixbp&S_PKG=opencryptoki

To extract the fixes from the tar file:

zcat opencki-3.23.0.tar.Z | tar xvf -

IMPORTANT: If possible, it is recommended that a mksysb backup of the system be created. Verify it is both bootable and readable before proceeding.

Note that all the previously reported security vulnerability fixes are also included in above mentioned fileset level.

To preview the fix installation:

installp -apYd . opencki

To install the fix package:

installp -aXYd . opencki

openssl dgst -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file]

openssl dgst -sha256 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file]

Published advisory OpenSSL signature file location:

<https://aix.software.ibm.com/aix/efixes/security/opencryptoki_advisory.asc.sig&gt;

Workarounds and Mitigations

None