IBM SECURITY ADVISORY First Issued: Fri Jun 28 12:07:38 CDT 2024 The most recent version of this document is available here: https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory15.asc Security Bulletin: PowerSC is vulnerable to security restrictions bypass and denial of service due to Curl =============================================================================== SUMMARY: Vulnerabilities in Curl could allow a remote attacker to bypass security restrictions (CVE-2024-2466, CVE-2024-2004, CVE-2024-2379) or cause a denial of service (CVE-2024-2398). PowerSC uses Curl as part of PowerSC Trusted Network Connect (TNC). =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2024-2466 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2466 DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw when built to use mbedTLS. By sending a specially crafted request, an attacker could exploit this vulnerability to bypass TLS certificate check. CVSS Base score: 5.3 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/286431 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-2024-2004 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2004 DESCRIPTION: cURL libcurl could allow a local attacker to bypass security restrictions, caused by a flaw in the logic for removing protocols. By sending a specially crafted request, an attacker could exploit this vulnerability to use the disabled set of protocols. CVSS Base score: 3.7 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/286427 for the current score. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N) CVEID: CVE-2024-2379 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2379 DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw when wolfSSL library was built with the OPENSSL_COMPATIBLE_DEFAULTS symbol set. By sending a specially-crafted request, an attacker could exploit this vulnerability to bypass certificate verification for a QUIC connection. CVSS Base score: 3.7 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/286429 for the current score. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N) CVEID: CVE-2024-2398 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-2398 DESCRIPTION: cURL libcurl is vulnerable to a denial of service, caused by a memory leak when allowing HTTP/2 server push. By sending a specially crafted PUSH_PROMISE frames with an excessive amount of headers, 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/286430 for the current score. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) AFFECTED PRODUCTS AND VERSIONS: PowerSC 1.3, 2.0, 2.1, 2.2 The vulnerabilities in the following filesets are being addressed: key_fileset = powerscStd.tnc_pm key_fileset = curl-8.7.1-1.aix7.1.ppc.rpm Fileset Lower Level Upper Level KEY --------------------------------------------------------------- powerscStd.tnc_pm 1.3.0.4 2.2.0.2 key_w_fs curl-8.7.1-1.aix7.1.ppc.rpm 7.19.4 8.6.0 key_w_fs Note: To find out whether the affected PowerSC filesets are installed on your systems, refer to the lslpp command found in AIX user's guide. To find out whether the affected curl filesets are installed on your systems, refer to the rpm command found in AIX user's guide. Example: lslpp -l | grep powerscStd Example: rpm -qa | grep curl REMEDIATION: FIXES IBM strongly recommends addressing the vulnerability now. Fixes are available. The fixes can be downloaded via yum: To install any dependencies along with the fix package: yum update curl 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 PowerSC Security Advisories via email, please visit "My Notifications": https://www.ibm.com/support/mynotifications 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: https://aix.software.ibm.com/aix/efixes/security/systems_p_os_aix_security_pubkey.txt 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 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Fri Jun 28 12:07:38 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.