IBM SECURITY ADVISORY First Issued: Tue Mar 21 13:26:15 CDT 2023 The most recent version of this document is available here: https://aix.software.ibm.com/aix/efixes/security/openssl_advisory38.asc Security Bulletin: Multiple vulnerabilities in OpenSSL affect AIX =============================================================================== SUMMARY: Vulnerabilities in OpenSSL could allow a remote attacker to cause a denial service (CVE-2022-3996, CVE-2023-0401, CVE-2022-4203, CVE-2023-0216, CVE-2023-0215, CVE-2023-0217, CVE-2023-0286, CVE-2022-4450) or obtain sensitive information (CVE-2022-4304). OpenSSL is used by AIX as part of AIX's secure network communications. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2022-3996 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3996 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a double locking flaw when an X.509 certificate contains a malformed policy constraint and policy processing is enabled. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition on the web server. CVSS Base Score: 3.7 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/242005 for the current score CVSS Environmental Score*: Undefined CVSS Vector:(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L) CVEID: CVE-2023-0401 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0401 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a NULL pointer dereference during PKCS7 data verification. A remote attacker could exploit this vulnerability to cause the application to crash. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246618 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-2022-4304 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4304 DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by a timing-based side channel in the RSA Decryption implementation. By sending an overly large number of trial messages for decryption, an attacker could exploit this vulnerability to obtain sensitive information. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246612 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:N/A:N) CVEID: CVE-2022-4203 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4203 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a read buffer overrun triggered by the improper handling of X.509 certificate verification. A remote attacker could exploit this vulnerability to cause the system to crash. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246613 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-2023-0216 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0216 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by an invalid pointer dereference related to the incorrect handling of malformed PKCS7 data. A remote attacker could exploit this vulnerability to cause the application to crash. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246617 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-2023-0215 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0215 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a use-after-free error related to the incorrect handling of streaming ASN.1 data by the BIO_new_NDEF function. A remote attacker could exploit this vulnerability to cause a denial of service. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246614 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-2023-0217 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0217 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a NULL pointer dereference related to the validation of certain DSA public keys. A remote attacker could exploit this vulnerability to cause the application to crash. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246619 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-2023-0286 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0286 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a type confusion error related to X.400 address processing inside an X.509 GeneralName. By passing arbitrary pointers to a memcmp call, a remote attacker could exploit this vulnerability to read memory contents or cause a denial of service. CVSS Base Score: 8.2 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246611 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:N/A:H) CVEID: CVE-2022-4450 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4450 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a double-free error related to the improper handling of specific PEM data by the PEM_read_bio_ex() function. By sending specially crafted PEM files for parsing, a remote attacker could exploit this vulnerability to cause the system to crash. CVSS Base Score: 7.5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/246615 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) AFFECTED PRODUCTS AND VERSIONS: AIX 7.1, 7.2, 7.3 The following fileset levels are vulnerable: key_fileset = osrcaix Fileset Lower Level Upper Level KEY ------------------------------------------------------- openssl.base 1.0.2.500 1.0.2.2105 key_w_fs openssl.base 1.1.1.0 1.1.1.1202 key_w_fs openssl.base 1.1.2.0 1.1.2.1202 key_w_fs openssl.base 20.13.102.1000 20.16.102.2106 key_w_fs openssl.base 3.0.5.101 3.0.7.1000 key_w_fs Note: A. 0.9.8, 1.0.1 OpenSSL versions are out-of-support. Support for OpenSSL 1.0.2 version ends by December 2023. Customers are advised to upgrade to OpenSSL 1.1.1 or 3.0 version. B. Latest level of OpenSSL fileset is available from the web download site: https://www-01.ibm.com/marketing/iwm/iwm/web/pickUrxNew.do?source=aixbp&S_PKG=openssl 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 openssl.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&S_PKG=openssl To extract the fixes from the tar file: For OpenSSL 3.0: zcat openssl-3.0.8.1000.tar.Z | tar xvf - For OpenSSL 1.1.1 with no weak ciphers support: zcat openssl-1.1.2.2000.tar.Z | tar xvf - For OpenSSL 1.1.1 with all ciphers support: zcat openssl-1.1.1.2000.tar.Z | tar xvf - For OpenSSL 1.0.2: zcat openssl-1.0.2.2106.tar.Z | tar xvf - For OpenSSL 1.0.2 with FIPS: zcat openssl-fips-20.16.102.2107.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. Please refer to the readme file (provided along with the fileset) for the complete list of vulnerabilities fixed. To preview the fix installation: installp -apYd . openssl To install the fix package: installp -aXYd . openssl 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/openssl_advisory38.asc.sig WORKAROUNDS AND MITIGATIONS: None. =============================================================================== CONTACT US: Note: Keywords labeled as KEY in this document are used for parsing purposes. If you would like to receive AIX Security Advisories via email, please visit "My Notifications": https://www.ibm.com/support/mynotifications To view previously issued advisories, please visit: https://www14.software.ibm.com/webapp/set2/subscriptions/onvdq Contact IBM Support for questions related to this announcement: https://ibm.com/support/ To obtain the OpenSSL public key that can be used to verify the signed advisories and ifixes: Download the key from our web page: ftp://ftp.software.ibm.com/systems/power/AIX/systems_p_os_aix_security_pubkey.txt Please contact your local IBM AIX support center for any assistance. REFERENCES: Review this information as needed, no action required. 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: Multiple vulnerabilities in OpenSSL affect AIX https://www.ibm.com/support/pages/node/6964854 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Tue Mar 21 13:26:15 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.