AIX is affected by a denial of service (CVE-2024-0397) and information disclosure (CVE-2024-4032 CVE-2024-37891) due to Python

IBM SECURITY ADVISORY

First Issued: Tue Sep 17 16:13:13 CDT 2024

The most recent version of this document is available here:

https://aix.software.ibm.com/aix/efixes/security/python_advisory12.asc

Security Bulletin: AIX is affected by a denial of service (CVE-2024-0397) and
information disclosure (CVE-2024-4032, CVE-2024-37891) due to Python

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

SUMMARY:

Vulnerabilities in Python could allow a remote attacker to cause a denial
of service (CVE-2024-0397) or obtain sensitive information (CVE-2024-4032,
CVE-2024-37891). Python is used by AIX as part of Ansible node management
automation. 

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

VULNERABILITY DETAILS:

CVEID: CVE-2024-4032
    https://vulners.com/cve/CVE-2024-4032
DESCRIPTION: An unspecified error with ipaddress considers some not
    globally reachable addresses global and vice versa in Python CPython
    has an unknown impact and attack vector.
CVSS Base Score: 5.3
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/294993
    for the current score
CVSS Environmental Score*: Undefined
CVSS Vector:(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2024-0397
    https://vulners.com/cve/CVE-2024-0397
DESCRIPTION: Python CPython is vulnerable to a denial of service, caused
    by a locking in cert_store_stats and get_ca_certs due to a memory race
    condition. By sending a specially crafted request, a remote attacker
    could exploit this vulnerability to cause a denial of service
    condition.
CVSS Base Score: 7.5
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/294995
    for the current score
CVSS Environmental Score*: Undefined
CVSS Vector:(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2024-37891
    https://vulners.com/cve/CVE-2024-37891
DESCRIPTION: urllib3 could allow a remote authenticated attacker to obtain
    sensitive information, caused by the failure to strip the
    Proxy-Authorization header during cross-origin redirects. By sending a
    specially crafted HTTP request, an attacker could exploit this
    vulnerability to obtain sensitive information.
CVSS Base Score: 4.4
CVSS Temporal Score: See
    https://exchange.xforce.ibmcloud.com/vulnerabilities/295053
    for the current score
CVSS Environmental Score*: Undefined
CVSS Vector:(CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N)


AFFECTED PRODUCTS AND VERSIONS:

    AIX 7.3
    VIOS 4.1

    The following fileset levels are vulnerable:
    
    key_fileset = osrcaix

    Fileset          Lower Level   Upper Level    KEY
    ------------------------------------------------------
    python3.9.base   3.9.0.0       3.9.19.2       key_w_fs

    Note:
    A. Latest level of Python fileset is available from the web download site:
    https://www.ibm.com/resources/mrs/assets?source=aixbp

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

    Example:  lslpp -L | grep -i python3.9.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

        To extract the fixes from the tar file:

        zcat python-3.9.19.3.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 . python3.9.base

        To install the fix package:

        installp -aXYd . python3.9.base
                    
        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/python_advisory12.asc.sig



WORKAROUNDS AND MITIGATIONS:

    None.

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

CONTACT US:

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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
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    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/python_advisory12.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:
    https://www.first.org/cvss/user-guide
On-line Calculator v3:
    https://www.first.org/cvss/calculator/3.0

RELATED INFORMATION:

Security Bulletin: AIX is affected by a denial of service (CVE-2024-0397)
and information disclosure (CVE-2024-4032, CVE-2024-37891) due to Python
    https://www.ibm.com/support/pages/node/7168787

ACKNOWLEDGEMENTS:

None.

CHANGE HISTORY:

First Issued: Tue Sep 17 16:13:13 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.