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

IBM SECURITY ADVISORY

First Issued: Mon Jun 3 08:50:37 CDT 2024

The most recent version of this document is available here:
https://aix.software.ibm.com/aix/efixes/security/opencryptoki_advisory.asc

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
    https://vulners.com/cve/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 Environmental Score*: Undefined
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:

    AIX 7.2, 7.3

    The vulnerabilities in the following filesets are being addressed:
    
    key_fileset = aix

    Fileset                 Lower Level  Upper Level KEY 
    ---------------------------------------------------------
    opencki.base            3.21.0.0     3.21.0.1000 key_w_fs

    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

        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


WORKAROUNDS AND MITIGATIONS:

    None.

===============================================================================

CONTACT US:

Note: Keywords labeled as KEY in this document are used for parsing
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Contact IBM Support for questions related to this announcement:

    https://ibm.com/support/

For information on how to securely verify AIX security bulletins and fixes:

    https://www.ibm.com/support/pages/node/6985269

To obtain the OpenSSL public key that can be used to verify the
signed advisories and ifixes:

    Download the key from our web page:

https://aix.software.ibm.com/aix/efixes/security/systems_p_os_aix_security_pubkey.txt

To verify the AIX/VIOS security bulletin:

    Published advisory OpenSSL signature file location:

    https://aix.software.ibm.com/aix/efixes/security/opencryptoki_advisory.asc.sig

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

Please contact your local IBM AIX support center for any
assistance.

REFERENCES:

Complete CVSS v3 Guide:  http://www.first.org/cvss/user-guide
On-line Calculator v3:
    http://www.first.org/cvss/calculator/3.0

RELATED INFORMATION:

IBM Secure Engineering Web Portal
    http://www.ibm.com/security/secure-engineering/bulletins.html

IBM Product Security Incident Response Blog
    https://www.ibm.com/blogs/psirt/

Security Bulletin: AIX is vulnerable to information disclosure due to
    openCryptoki (CVE-2024-0914)
    https://www.ibm.com/support/pages/node/7155796

ACKNOWLEDGEMENTS:

None.

CHANGE HISTORY:

First Issued: Mon Jun  3 08:50:37 CDT 2024

===============================================================================

*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact
of this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.

Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an “industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response.” IBM PROVIDES THE CVSS SCORES “AS IS” WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.