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
**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 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: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 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: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 Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

The following fileset levels are vulnerable:

Note:

A. Latest level of Python fileset is available from the web download site:

<https://www.ibm.com/resources/mrs/assets?source=aixbp&gt;

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

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&gt;

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&gt;

Workarounds and Mitigations

None