IBM SECURITY ADVISORY
First Issued: Fri Aug 18 09:49:04 CDT 2023
The most recent version of this document is available here:
https://aix.software.ibm.com/aix/efixes/security/python_advisory5.asc
Security Bulletin: AIX is affected by security restrictions bypass
(CVE-2023-24329) due to Python
===============================================================================
SUMMARY:
A vulnerability in Python could allow a remote attacker to bypass security
restrictions (CVE-2023-24329). Python is used by AIX as part of Ansible
node management automation.
===============================================================================
VULNERABILITY DETAILS:
CVEID: CVE-2023-24329
https://vulners.com/cve/CVE-2023-24329
DESCRIPTION: Python could allow a remote attacker to bypass security
restrictions, caused by a flaw in the urllib.parse component. By
sending a specially-crafted request using URL starts with blank
characters, an attacker could exploit this vulnerability to bypass
blocklisting methods.
CVSS Base Score: 7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/247730
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:H/A:N)
AFFECTED PRODUCTS AND VERSIONS:
AIX 7.3
The following fileset levels are vulnerable:
key_fileset = osrcaix
Fileset Lower Level Upper Level KEY
------------------------------------------------------
python3.9.base 3.9.0.0 3.9.16.0 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-3.9.17.0.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 . 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_advisory5.asc.sig
WORKAROUNDS AND MITIGATIONS:
None.
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CONTACT US:
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Download the key from our web page:
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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_advisory5.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 security restrictions bypass
(CVE-2023-24329) due to Python
https://www.ibm.com/support/pages/node/7028095
ACKNOWLEDGEMENTS:
None.
CHANGE HISTORY:
First Issued: Fri Aug 18 09:49:04 CDT 2023
===============================================================================
*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.