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://cve.mitre.org/cgi-bin/cvename.cgi?name=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
    purposes.

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    please visit "My Notifications":

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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.