IBM SECURITY ADVISORY First Issued: Thu Jul 28 13:12:18 CDT 2022 The most recent version of this document is available here: http://aix.software.ibm.com/aix/efixes/security/python_advisory.asc https://aix.software.ibm.com/aix/efixes/security/python_advisory.asc ftp://aix.software.ibm.com/aix/efixes/security/python_advisory.asc Security Bulletin: AIX is affected by multiple vulnerabilities in Python =============================================================================== SUMMARY: AIX is affected by multiple vulnerabilities due to Python. Python is used by AIX as part of Ansible node management automation. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2022-22827 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22827 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22827 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of storeAtts in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216901 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2022-25236 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25236 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25236 DESCRIPTION: libexpat is vulnerable to a denial of service, caused by improper protection against insertion of namesep characters into namespace URIs in xmlparse.c. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition. CVSS Base Score: 5.3 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/219784 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:L) CVEID: CVE-2022-25235 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25235 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25235 DESCRIPTION: libexpat is vulnerable to a denial of service, caused by improper input validation in xmltok_impl.c. By persuading a victim to open a specially-crafted content with malformed encoding, a remote attacker could exploit this vulnerability to cause a denial of service condition. CVSS Base Score: 3.3 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/219782 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L) CVEID: CVE-2022-25315 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25315 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25315 DESCRIPTION: libexpat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in storeRawNames. By persuading a victim to open a specially-crafted file, an attacker could overflow a buffer and execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/219945 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2022-22824 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22824 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22824 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of defineAttribute in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216906 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2022-22825 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22825 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22825 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of lookup in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216905 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2022-22823 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22823 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22823 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of build_model in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216907 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2021-46143 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46143 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46143 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of m_groupSize in doProlog in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216875 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2022-23990 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23990 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23990 DESCRIPTION: Expat (aka libexpat) could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in the doProlog function. By sending a specially-crafted request, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 9.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/218206 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVEID: CVE-2022-22826 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22826 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22826 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of nextScaffoldPart in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216904 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2022-25314 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25314 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25314 DESCRIPTION: libexpat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in the copyString function. By sending an overly-long argument, an attacker could overflow a buffer and execute arbitrary code on the system. CVSS Base Score: 7.3 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/219946 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) CVEID: CVE-2022-25313 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25313 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25313 DESCRIPTION: libexpat is vulnerable to a denial of service, caused by stack exhaustion in build_model. By persuading a victim to open a specially-crafted file, a remote attacker could exploit this vulnerability using a large nesting depth in the DTD element to cause a denial of service. CVSS Base Score: 5.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/219947 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) CVEID: CVE-2022-23852 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23852 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23852 DESCRIPTION: Expat (aka libexpat) could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in the XML_GetBuffer function. By sending a specially-crafted request, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 9.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/218007 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVEID: CVE-2021-45960 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960 DESCRIPTION: Expat (aka libexpat) is vulnerable to a denial of service, caused by a realloc misbehavior issue in the storeAtts function in xmlparse.c. By persuading a victim to open a specially-crafted XML content, a remote attacker could exploit this vulnerability to cause a the application to crash. CVSS Base Score: 5.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216473 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) CVEID: CVE-2022-22822 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22822 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22822 DESCRIPTION: Expat could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow of addBinding in xmlparse.c. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 7.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/216908 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) 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 3.9.11.99 key_w_fs Note: A. Latest level of Python fileset is available from the web download site: https://www-01.ibm.com/marketing/iwm/iwm/web/pickUrxNew.do?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-01.ibm.com/marketing/iwm/iwm/web/pickUrxNew.do?source=aixbp To extract the fixes from the tar file: zcat python-3.9.12.0.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: http://aix.software.ibm.com/aix/efixes/security/python_advisory.asc.sig https://aix.software.ibm.com/aix/efixes/security/python_advisory.asc.sig ftp://aix.software.ibm.com/aix/efixes/security/python_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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REFERENCES: Complete CVSS v3 Guide: http://www.first.org/cvss/user-guide https://www.first.org/cvss/user-guide On-line Calculator v3: http://www.first.org/cvss/calculator/3.0 https://www.first.org/cvss/calculator/3.0 RELATED INFORMATION: Security Bulletin: AIX is affected by multiple vulnerabilities in Python https://www.ibm.com/support/pages/node/6607878 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Thu Jul 28 13:12:18 CDT 2022 =============================================================================== *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.