IBM SECURITY ADVISORY

First Issued: Wed Mar 20 11:34:52 CDT 2024

The most recent version of this document is available here:
https://aix.software.ibm.com/aix/efixes/powersc/security/curl_advisory14.asc

Security Bulletin: PowerSC is vulnerable to security restrictions bypass due
    to Curl (CVE-2023-46218, CVE-2023-46219, CVE-2024-0853)

===============================================================================

SUMMARY:

    Vulnerabilities in Curl could allow a remote attacker to bypass security
    restrictions (CVE-2023-46218, CVE-2023-46219, CVE-2024-0853). PowerSC uses
    Curl as part of PowerSC Trusted Network Connect (TNC).


===============================================================================

VULNERABILITY DETAILS:

    CVEID: CVE-2023-46218
        https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46218
    DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security
        restrictions, caused by a mixed case flaw when curl is built without
        PSL support. By sending a specially crafted request, an attacker could
        exploit this vulnerability to allow a HTTP server to set "super
        cookies" in curl.
    CVSS Base score: 6.5
    CVSS Temporal Score: See:
        https://exchange.xforce.ibmcloud.com/vulnerabilities/273320
        for the current score.
    CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

    CVEID: CVE-2023-46219
        https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46219
    DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security
        restrictions, caused by a flaw when saving HSTS data to an excessively
        long file name. By sending a specially crafted request, an attacker
        could exploit this vulnerability to use files that unaware of the HSTS
        status.
    CVSS Base score: 3.7
    CVSS Temporal Score: See:
        https://exchange.xforce.ibmcloud.com/vulnerabilities/273321
        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-2024-0853
        https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0853
    DESCRIPTION: cURL libcurl could allow a remote authenticated attacker to
        bypass security restrictions, caused by a flaw with keeping the SSL
        session ID for connections in its cache even when the verify status
        (OCSP stapling) test failed. By sending a specially crafted request,
        an attacker could exploit this vulnerability to bypass OCSP
        verification.
    CVSS Base score: 3.8
    CVSS Temporal Score: See:
        https://exchange.xforce.ibmcloud.com/vulnerabilities/281082
        for the current score.
    CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N)


    AFFECTED PRODUCTS AND VERSIONS:
 
        PowerSC 1.3, 2.0, 2.1

        The vulnerabilities in the following filesets are being addressed:
        
        key_fileset = powerscStd.tnc_pm
        key_fileset = curl-8.5.0-1.aix7.1.ppc.rpm

        Fileset                       Lower Level  Upper Level KEY 
        ---------------------------------------------------------------
        powerscStd.tnc_pm             1.3.0.4      2.1.0.6     key_w_fs
        curl-8.5.0-1.aix7.1.ppc.rpm   7.19.4       8.5.0       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.


===============================================================================

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    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: Wed Mar 20 11:34:52 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.