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AUSCERT External Security Bulletin Redistribution
Security Bulletin: HTTP Request smuggling vulnerability may
affect IBM HTTP Server (CVE-2015-3183)
2 September 2015
AusCERT Security Bulletin Summary
Product: IBM HTTP Server
Operating System: AIX
Impact/Access: Provide Misleading Information -- Remote with User Interaction
CVE Names: CVE-2015-3183
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Security Bulletin: HTTP Request smuggling vulnerability may affect IBM HTTP
More support for:
IBM HTTP Server
6.1, 7.0, 8.0, 8.5, 8.5.5
AIX, HP-UX, Linux, Solaris, Windows
Request smuggling vulnerability may affect the IBM HTTP Server used by IBM
WebSphere Application Server
DESCRIPTION: Apache HTTP Server is vulnerable to HTTP request smuggling,
caused by a chunk header parsing flaw in the apr_brigade_flatten() function.
By sending a specially-crafted request in a malformed chunked header to the
Apache HTTP server, an attacker could exploit this vulnerability to poison the
web cache, bypass web application firewall protection, and conduct XSS
CVSS Base Score: 6.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/104844 for the current
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
Affected Products and Versions
This vulnerability affects all versions and releases of IBM HTTP Server
(powered by Apache) component in all editions of WebSphere Application Server
and bundling products.
The recommended solutions is to apply the interim fix, Fix Pack or PTF
containing APAR PI42928 for each named product as soon as practical.
For affected IBM HTTP Server for WebSphere Application Server:
For V220.127.116.11 through 18.104.22.168 Full Profile:
* Upgrade to a minimum of Fix Pack 22.214.171.124 or later then apply Interim Fix
* Apply Fix Pack 126.96.36.199 or later (targeted availability 11 September
For V8.0 through 188.8.131.52:
* Upgrade to a minimum of Fix Pack 184.108.40.206 or later and then apply Interim
* Apply Fix Pack 220.127.116.11 or later (targeted availability 18 January 2016).
For V18.104.22.168 through 22.214.171.124:
* Upgrade to a minimum of Fix Pack 126.96.36.199 or later and then apply Interim
* Apply Fix Pack 188.8.131.52 or later (targeted availability 02 November 2015).
For V184.108.40.206 through 220.127.116.11:
* Upgrade to Fix Pack 18.104.22.168 and then apply cumulative Interim Fix PI45596
(this includes the fix for PI42928)
For unsupported versions IBM recommends upgrading to a fixed, supported
version of the product.
Workarounds and Mitigations
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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
Complete CVSS v2 Guide
On-line Calculator v2
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
01 September 2015: 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.
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.
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