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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3619 Potential XML External Entity (XXE) Injection Vulnerability in WebSphere Application Server 21 November 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM WebSphere Application Server Publisher: IBM Operating System: AIX HP-UX IBM i Linux variants Solaris Windows z/OS Impact/Access: Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-1905 Original Bulletin: https://www.ibm.com/support/docview.wss?uid=ibm10738721 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Potential XML External Entity (XXE) Injection Vulnerability in WebSphere Application Server (CVE-2018-1905) Security Bulletin Document information More support for: WebSphere Application Server Software version: 9.0 Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS Software edition: Advanced, Base, Developer, Enterprise, Express, Network Deployment, Single Server Reference #: 0738721 Modified date: 20 November 2018 Summary There is a potential XXE injection vulnerability in the Knowledge Center used by WebSphere Application Server. Vulnerability Details CVEID: CVE-2018-1905 DESCRIPTION: IBM WebSphere Application Server is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. CVSS Base Score: 7.1 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 152534 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L) Affected Products and Versions This vulnerability affects the following versions and releases of IBM WebSphere Application Server: o Version 9.0 Remediation/Fixes The recommended solution is to apply the interim fix, Fix Pack or PTF containing the APAR for each named product as soon as practical. For WebSphere Application Server traditional: For V9.0.0.0 through 9.0.0.9: . Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH04192 - --OR-- . Apply Fix Pack 9.0.0.10 or later (targeted availability 4Q 2018). Important Note IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk. Reference Complete CVSS v3 Guide On-line Calculator v3 Related Information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog Acknowledgement The vulnerability was reported to IBM by Benoit Cote-Jodoin from GoSecure Change History 20 November 2018: original document published *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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW/TY3WaOgq3Tt24GAQgidRAAqrdNXvHWfkSfZxMqWU0TkuK8pyoAw7wk WiPeEqV3HjOOXZ9VNOr1OXfOLIoYAKPm3eJ3q8BV/UYqMMZpwjR+aRIZT8BQeCTE b82kjmf/QcBKzWnCakw05cI0eWHCtn9uh7KX7ARMhCpEMszXVCjD/6WzEDsfPKdz xXhY8tyf0PE+K5QAX8mxFs2byc0/qpvcprGRG9aK9rBmqNEe8j7tSPYSgM2uTYxE /J9CO9Nlu3wF7g0qUQ7SJKQwbZ9gfxkUj2kClJ9SGOw8j4PKT1yNi2r7xJ/WqTsz pGQGBxYiQTX49Zd8sD4B4bpyB8rfxq3pL6OmJYEOKTH404VfmockGrimq8T8XoWZ ISflSLZcDevTHvg0VrJZKqPakuB5Ucf5roWZyde9uZePZT3zVlvUWo457lxLZuMj btTOoAC/wNDRrRVHOQfAE6J4lc96XfDstF43LMadqMhRZr1sfpS09wdE5zbAgJ4M WxV+9C4oRA3L8ulAVYyAQJdN52Wblcgh71Zwv0v59/VJ+4baQ811Pe5zdwq0/9vp kNcaW6mgEfDKuiUsMitaZOtHB28l2jzR/muJQqm5IVNDzjP9twvoiGTr68Cp067Z 0PyZDDd28SXRu/+szufnXmCa5pjse8GFAEpZ+zFjy04XgEpXOGN2jw0XXeOiy3kA sMZRzRSkXXo= =1rXV -----END PGP SIGNATURE-----