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Security Bulletin: Multiple Denial of Service vulnerabilities with Expat might affect IBM HTTP Server used with IBM Security Network Protection

Description

## Summary There are several vulnerabilities that might affect IBM HTTP Server that is used by IBM Security Network Protection. ## Vulnerability Details **CVEID:** [_CVE-2012-0876_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0876>)** DESCRIPTION:** Expat is vulnerable to a denial of service, caused by insufficient randomization of hash data structures. By sending multiple specially-crafted HTTP POST requests to an affected application containing conflicting hash key values, a remote attacker could exploit this vulnerability to cause the consumption of CPU resources. CVSS Base Score: 5 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/73868_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/73868>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) **CVEID:** [_CVE-2012-1148_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1148>)** DESCRIPTION:** Expat is vulnerable to a denial of service, caused by a memory leak in poolGrow when handling XML data. A remote attacker could exploit this vulnerability to cause the application using the vulnerable XML parsing library to crash. CVSS Base Score: 5 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/73867_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/73867>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) **CVEID:** [_CVE-2016-0718_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0718>)** DESCRIPTION:** Expat XML parser is vulnerable to a denial of service, caused by an out-of-bounds read within XML parser. By using a specially-crafted file, a remote attacker could exploit this vulnerability to cause the application to crash. CVSS Base Score: 9.8 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/113408_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/113408>) for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) **CVEID:** [_CVE-2016-4472_](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4472>)** DESCRIPTION:** Expat XML parser is vulnerable to a denial of service, caused by the removal by compilers with certain optimization settings. By using a specially-crafted XML data, a remote attacker could exploit this vulnerability to cause the application to crash. CVSS Base Score: 5.3 CVSS Temporal Score: See [_https://exchange.xforce.ibmcloud.com/vulnerabilities/114683_](<https://exchange.xforce.ibmcloud.com/vulnerabilities/114683>) for the current score CVSS Environmental Score*: Undefined 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 IBM Security Network Protection 5.3.1 IBM Security Network Protection 5.3.2 IBM Security Network Protection 5.3.3 ## Remediation/Fixes _Product_ | _VRMF_| _Remediation/First Fix_ ---|---|--- IBM Security Network Protection| Firmware version 5.3.1| Download Firmware 5.3.1.11 from [IBM Security License Key and Download Center](<https://ibmss.flexnetoperations.com/control/isdl/home>) and upload and install via the Available Updates page of the Local Management Interface. IBM Security Network Protection| Firmware version 5.3.2| Download Firmware 5.3.2.5 from [IBM Security License Key and Download Center](<https://ibmss.flexnetoperations.com/control/isdl/home>) and upload and install via the Available Updates page of the Local Management Interface. IBM Security Network Protection| Firmware version 5.3.3| Install Firmware 5.3.3.1 from the Available Updates page of the Local Management Interface, or by performing a One Time Scheduled Installation from SiteProtector. ## Workarounds and Mitigations None ## Get Notified about Future Security Bulletins Subscribe to [My Notifications](< http://www-01.ibm.com/software/support/einfo.html>) to be notified of important product support alerts like this. ### References [Complete CVSS v2 Guide](<http://www.first.org/cvss/v2/guide> "Link resides outside of ibm.com" ) [On-line Calculator v2](<http://nvd.nist.gov/CVSS-v2-Calculator> "Link resides outside of ibm.com" ) [Complete CVSS v3 Guide](<http://www.first.org/cvss/user-guide> "Link resides outside of ibm.com" ) [On-line Calculator v3](<http://www.first.org/cvss/calculator/3.0> "Link resides outside of ibm.com" ) Off ## Related Information [IBM Secure Engineering Web Portal](<http://www.ibm.com/security/secure-engineering/bulletins.html>) [IBM Product Security Incident Response Blog](<http://www.ibm.com/blogs/psirt>) ## Change History 21 November 2016: 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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions. 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Affected Software


CPE Name Name Version
IBM Security Network Protection 5.3.1
IBM Security Network Protection 5.3.2
IBM Security Network Protection 5.3.3

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