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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3050 Security Bulletin: IBM InfoSphere Information Server is potentially vulnerable to XML External Entity Injection (XXE) 9 October 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM InfoSphere Information Server Publisher: IBM Operating System: AIX HP-UX Linux variants Solaris Windows Impact/Access: Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-1727 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10718887 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: IBM InfoSphere Information Server is potentially vulnerable to XML External Entity Injection (XXE) Document information More support for: InfoSphere Information Server Software version: 9.1, 11.3, 11.5, 11.7 Operating system(s): AIX, HP-UX, Linux, Solaris, Windows Reference #: 0718887 Modified date: 08 October 2018 Summary An XML External Entity Injection (XXE) vulnerability in InfoSphere Information Server Manager can potentially be used by an attacker to retrieve sensitive documents. Information Server Manager has a bulk import feature to help users import lists of Source Control Module (SCM) websites or user names. Use case examples for the bulk load feature are: - - Multiple users want to use the SCM and there are three or more sites that need to be added. - - DataStage version upgrades (i.e. version 11.3 to version 11.5) IBM Information Server Manager uses XML format for export and import of the SCM web site name and the links. Information Server Manager also allows the same information to be keyed in manually into the Add Available Software Sites dialog. There is a potential vulnerability when importing the website list using XML import. Vulnerability Details CVEID: CVE-2018-1727 DESCRIPTION: IBM InfoSphere Information 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/ 147630 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 The following products, running on all supported platforms, are affected: IBM InfoSphere Information Server: versions 9.1, 11.3, 11.5, and 11.7 IBM InfoSphere Information Server on Cloud: versions 11.5, and 11.7 Remediation/Fixes None Workarounds and Mitigations For all releases of Information Server Manager: o Avoid using the XML import option. Instead, use the ADD button to add site and link functionality information where possible. o If XML format has to be used for import, manually check the XML file before importing the file to determine if there is a DTD / DOCTYPE section or any other section apart from SITE tag. DTD sections are not required in XML files used with Information Server Manager, and if present, they can be safely removed before importing. IBM recommends manually checking the XML file content before importing the file. If there is a DTD / DOCTYPE section, verify its contents for any unexpected content. Sample XML for import: <xml version="1.0" encoding="UTF-8"> <bookmarks> <site url="http://dl.microsoft.com/eclipse/tfs" selected="true" name="TFS_Microsoft"/> </bookmarks> Change History 08 October 2018: Original version 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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW7we62aOgq3Tt24GAQjP9RAAmwBKjbkNgfaj7G64S5iqpYvEfvtEm4q0 UJW0hIvk24JoSyBOcAJFA2sNseqjo/tGDetyqX1Fwn7gi4xb19ZEvek2AnjwkWOA RB/O7JHTWQT7kCNW5s5hBh7RThePlZEVtaRJEb11Cf5uvqfwf9Y8VifZKnVy/2ma cKPl0IWC3vl6zWupHI35TU6MvzoI0ZyfuCkk+Zdlv3OyXUnc9pAa8gYirAVW0a12 J+0goyDdIL+lv3S0DAbYPyoDckY8aQkXY1yhNJTpK7qhSvwc6xqdNG2Wjwqry1B0 ajtV6hoklCPzeyx9+6/WMZeg6Mqy3OVJkVyhKI/FymOcJsdIfhrOz7qTGbnB3fY/ EmCKdfWrI7FpNghklx4cfVPQkg4iCeHooY7GZurgNwhpjyAOaViF2MkPtCm29qxu skAhIBEe6dFOPxjWPjjWEZptgN7p18jg1GSmgtL50N74yWBWDRwXEmwtqMdOWZQu skiqzmITAHhjEa0rxu5mOh10WC4cE/zb9rJAdgt7mrCSUPBWZyDfvY9k5oXJzWkt XaU5ZP3691Vlf3bs1DkEDDrglMM3oD+We1b6M+hEN7+D36gPzfxNu5wLPnc3SF7n jRpkUJVMtOHJBeSf100/KkH3KwRwNaW3BpXppbgpxWZeWF+Uv22UfAbFTUxnzYXZ iJ7QvfbKSwE= =QMO0 -----END PGP SIGNATURE-----