AIX is vulnerable to an SSL server spoof due to Apache Commons HttpClient

IBM SECURITY ADVISORY

First Issued: Thu Apr 13 13:44:57 CDT 2023

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

Security Bulletin: AIX is vulnerable to an SSL server spoof due to
Apache Commons HttpClient (CVE-2012-5783)

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

SUMMARY:

A vulnerability in Apache Commons HttpClient could allow a remote
attacker to conduct spoofing attacks (CVE-2012-5783). AIX ships Apache
Commons HttpClient as part of Electronic Customer Care.

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

VULNERABILITY DETAILS:

CVEID: CVE-2012-5783
    https://vulners.com/cve/CVE-2012-5783
    https://vulners.com/cve/CVE-2012-5783
DESCRIPTION: Apache Commons HttpClient, as used in Amazon Flexible
    Payments Service (FPS) merchant Java SDK and other products, could
    allow a remote attacker to conduct spoofing attacks, caused by the
    failure to verify that the server hostname matches a domain name in
    the subject's Common Name (CN) field of the X.509 certificate. By
    persuading a victim to visit a Web site containing a specially-crafted
    certificate, an attacker could exploit this vulnerability using
    man-in-the-middle techniques to spoof an SSL server.
CVSS Base Score: 4.3
CVSS Temporal Score: See 
    https://exchange.xforce.ibmcloud.com/vulnerabilities/79984
    for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)


AFFECTED PRODUCTS AND VERSIONS:

    AIX 7.1, 7.2, 7.3
    VIOS 3.1

    The following fileset levels are vulnerable:
    
    key_fileset = aix

    Fileset                 Lower Level  Upper Level  KEY
    ----------------------------------------------------------
    bos.ecc_client.rte      7.1.5.0      7.1.5.34     key_w_fs
    bos.ecc_client.rte      7.2.5.0      7.2.5.1      key_w_fs
    bos.ecc_client.rte      7.2.5.100    7.2.5.100    key_w_fs
    bos.ecc_client.rte      7.2.5.200    7.2.5.200    key_w_fs
    bos.ecc_client.rte      7.3.0.0      7.3.0.1      key_w_fs
    bos.ecc_client.rte      7.3.1.0      7.3.1.0      key_w_fs
    
    To find out whether the affected filesets are installed 
    on your systems, refer to the lslpp command found in AIX user's guide.

    Example:  lslpp -L | grep -i bos.ecc_client.rte


REMEDIATION:

    A. APARS
        
        IBM has assigned the following APARs to this problem:

        AIX Level APAR     Availability  SP        KEY
        -----------------------------------------------------
        7.1.5     IJ45221  **            SP12      key_w_apar
        7.2.5     IJ44994  **            SP06      key_w_apar
        7.3.0     IJ45224  **            SP04      key_w_apar
        7.3.1     IJ44987  **            SP02      key_w_apar

        VIOS Level APAR    Availability  SP        KEY
        -----------------------------------------------------
        3.1.2      IJ45222 **            3.1.2.60  key_w_apar
        3.1.3      IJ45223 **            3.1.3.40  key_w_apar
        3.1.4      IJ44994 **            3.1.4.20  key_w_apar

        Subscribe to the APARs here:

        https://www.ibm.com/support/pages/apar/IJ44987
        https://www.ibm.com/support/pages/apar/IJ44994
        https://www.ibm.com/support/pages/apar/IJ45221
        https://www.ibm.com/support/pages/apar/IJ45222
        https://www.ibm.com/support/pages/apar/IJ45223
        https://www.ibm.com/support/pages/apar/IJ45224

        By subscribing, you will receive periodic email alerting you
        to the status of the APAR, and a link to download the fix once
        it becomes available.

    B. FIXES

        IBM strongly recommends addressing the vulnerability now.

        AIX and VIOS fixes are available. 

        The AIX and VIOS fixes can be downloaded via https from:

        https://aix.software.ibm.com/aix/efixes/security/commonshttp_fix.tar

        The link above is to a tar file containing this signed
        advisory, fix packages, and OpenSSL signatures for each package.
        The fixes below include prerequisite checking. This will
        enforce the correct mapping between the fixes and AIX
        Technology Levels.

        AIX Level  Interim Fix (*.Z)         KEY
        ----------------------------------------------
        7.1.5.9    IJ45221sAa.230309.epkg.Z  key_w_fix
        7.1.5.10   IJ45221sAa.230309.epkg.Z  key_w_fix
        7.1.5.11   IJ45221sAa.230309.epkg.Z  key_w_fix
        7.2.5.3    IJ44994s4a.230412.epkg.Z  key_w_fix
        7.2.5.4    IJ44994s4a.230412.epkg.Z  key_w_fix
        7.2.5.5    IJ44994s5a.230307.epkg.Z  key_w_fix
        7.3.0.1    IJ45224s2a.230309.epkg.Z  key_w_fix
        7.3.0.2    IJ45224s2a.230309.epkg.Z  key_w_fix
        7.3.0.3    IJ45224s2a.230309.epkg.Z  key_w_fix
        7.3.1.1    IJ44987s1a.230307.epkg.Z  key_w_fix

        Please note that the above table refers to AIX TL/SP level as
        opposed to fileset level, i.e., 7.2.5.4 is AIX 7200-05-04.

        Please reference the Affected Products and Version section above
        for help with checking installed fileset levels.

        VIOS Level  Interim Fix (*.Z)         KEY
        -----------------------------------------------
        3.1.2.30    IJ45222s2a.230307.epkg.Z  key_w_fix
        3.1.2.40    IJ45222s2a.230307.epkg.Z  key_w_fix
        3.1.2.50    IJ45222s2a.230307.epkg.Z  key_w_fix
        3.1.3.14    IJ45223s4a.230307.epkg.Z  key_w_fix
        3.1.3.21    IJ45223s4a.230307.epkg.Z  key_w_fix
        3.1.3.30    IJ45223s4a.230307.epkg.Z  key_w_fix
        3.1.4.10    IJ44994s5a.230307.epkg.Z  key_w_fix


        To extract the fixes from the tar file:

        tar xvf commonshttp_fix.tar
        cd commonshttp_fix

        Verify you have retrieved the fixes intact:

        The checksums below were generated using the
        "openssl dgst -sha256 [filename]" command as the following:

        openssl dgst -sha256                                              filename                 KEY
        -----------------------------------------------------------------------------------------------------
        7b5296488a406617aacbc387f31565336610821e26ac9599657e246efae62f49  IJ44987s1a.230307.epkg.Z key_w_csum
        a79ff0361f4fc5ea68cbde506b90abbfcd9d51e074694571a6bb8b5dde9746cb  IJ44994s4a.230412.epkg.Z key_w_csum
        9f3f5a390468baa29e0df79db1e40d6e82828b50ca9b2af15e47375a6050b0d3  IJ44994s5a.230307.epkg.Z key_w_csum
        c01b7def86330e4dda232872a0fb795a8fc80d7076ed04d2e0c80b0547049d3d  IJ45221sAa.230309.epkg.Z key_w_csum
        73c1fa8a984a7bd9a5928e56052262082339db4264842e95a09cc61936e51285  IJ45222s2a.230307.epkg.Z key_w_csum
        c5050bfb62f5c789fb58214d7b99decd4ad764d88140f419618629599856e1f0  IJ45223s4a.230307.epkg.Z key_w_csum
        e0b17e7ef7b17349247f3e7336c64b337d6940819791f459a95e29fc90676269  IJ45224s2a.230309.epkg.Z key_w_csum


        These sums should match exactly. The OpenSSL signatures in the tar
        file and on this advisory can also be used to verify the
        integrity of the fixes.  If the sums or signatures cannot be
        confirmed, contact IBM Support at
        http://ibm.com/support/ and describe the discrepancy.         

        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/commonshttp_advisory.asc.sig

    C. FIX AND INTERIM FIX INSTALLATION

        If possible, it is recommended that a mksysb backup of the system 
        be created. Verify it is both bootable and readable before
        proceeding.

        To preview a fix installation:

        installp -a -d fix_name -p all  # where fix_name is the name of the
                                        # fix package being previewed.
        To install a fix package:

        installp -a -d fix_name -X all  # where fix_name is the name of the
                                        # fix package being installed.

        Interim fixes have had limited functional and regression
        testing but not the full regression testing that takes place
        for Service Packs; however, IBM does fully support them.

        Interim fix management documentation can be found at:

        http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html

        To preview an interim fix installation:

        emgr -e ipkg_name -p         # where ipkg_name is the name of the
                                     # interim fix package being previewed.

        To install an interim fix package:

        emgr -e ipkg_name -X         # where ipkg_name is the name of the
                                     # interim fix package being installed.

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:

Complete CVSS v3 Guide: http://www.first.org/cvss/user-guide
On-line Calculator v3:
    https://www.first.org/cvss/calculator/3.0

RELATED INFORMATION:

IBM Secure Engineering Web Portal
    https://www.ibm.com/security/secure-engineering/bulletins.html

IBM Product Security Incident Response Blog
    https://www.ibm.com/blogs/psirt/

Security Bulletin: AIX is vulnerable to an SSL server spoof due to
    Apache Commons HttpClient (CVE-2012-5783)
    https://www.ibm.com/support/pages/node/6983589

ACKNOWLEDGEMENTS:

None.

CHANGE HISTORY:

First Issued: Thu Apr 13 13:44:57 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.