ESB-2017.1794 - [Win][Linux][HP-UX][Solaris][AIX] IBM HTTP Server : Multiple vulnerabilities 2017-07-21

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1794
  Security Bulletin: Multiple Security Vulnerabilities in IBM HTTP Server
               (CVE-2017-7679, CVE-2017-7668, CVE-2017-3167)
                               21 July 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM HTTP Server
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Solaris
                   Linux variants
                   Windows
                   z/PS
Impact/Access:     Denial of Service   -- Remote/Unauthenticated
                   Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-7679 CVE-2017-7668 CVE-2017-3167

Reference:         ESB-2017.1603
                   ESB-2017.1583
                   ESB-2017.1533

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg22005280

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Security Bulletin: Multiple Security Vulnerabilities in IBM HTTP Server
(CVE-2017-7679, CVE-2017-7668, CVE-2017-3167)

Security Bulletin

Document information

More support for:

WebSphere Application Server

IBM HTTP Server

Software version:

7.0, 8.0, 8.5, 9.0

Operating system(s):

AIX, HP-UX, Linux, Solaris, Windows, z/OS

Software edition:

Advanced, Base, Enterprise, Network Deployment, Single Server

Reference #:

2005280

Modified date:

19 July 2017

Summary

There are multiple vulnerabilities in the IBM HTTP Server used by WebSphere
Application Server.

Vulnerability Details

CVEID:

CVE-2017-7679

DESCRIPTION:

Apache HTTPD could allow a remote attacker to obtain sensitive information,
caused by a buffer overread in mod_mime. By sending a specially crafted
Content-Type response header, a remote attacker could exploit this
vulnerability to read one byte past the end of a buffer.

CVSS Base Score: 5.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/127420

for the current score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID:

CVE-2017-7668

DESCRIPTION:

Apache HTTPD is vulnerable to a denial of service, caused by a buffer
overread in the ap_find_token() function. By sending a specially crafted
sequence of request headers, a remote attacker could exploit this
vulnerability to cause a segmentation fault.

CVSS Base Score: 5.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/127419

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)

CVEID:

CVE-2017-3167

DESCRIPTION:

Apache HTTPD could allow a remote attacker to bypass security restrictions,
caused by the use of the ap_get_basic_auth_pw() function by third-party
modules outside of the authentication phase. A remote attacker could exploit
this vulnerability to bypass authentication requirements.

CVSS Base Score: 5.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/127416

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:L/A:N)

Affected Products and Versions

These vulnerabilities affect the following versions and releases of IBM HTTP
Server (powered by Apache) component in all editions of WebSphere Application
Server and bundling products.

Version 9.0

Version 8.5

Version 8.0

Version 7.0

Remediation/Fixes

The CVE's above are contained in 3 separate APARs

PI82260 for CVE-2017-3167

PI82263 for CVE-2017-7668

PI82481 for CVE-2017-7679


For V9.0.0.0 through 9.0.0.4:


PI82481

- --OR--

 Apply Fix Pack 9.0.0.5 or later (targeted availability 29 September 2017).

For V8.5.0.0 through 8.5.5.11:

If you do not install the interim fix please note that: CVE-2017-3167 and
CVE-2017-7668 will be shipped in fixpack 8.5.5.12 available 21 July 2017.
CVE-2017-7679 will be shipped in fixpack 8.5.5.13 (targeted availability 05
February 2018).

 Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix

PI82481

- --OR--

 Apply Fix Pack 8.5.5.12 or 8.5.5.13 as noted above.

For V8.0.0.0 through 8.0.0.13:

 Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix

PI82481

- --OR--

 Apply Fix Pack 8.0.0.14 or later (targeted availability 16 October 2017).

For V7.0.0.0 through 7.0.0.43:

 Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix

PI82481

- --OR--

 Apply Fix Pack 7.0.0.45 or later (targeted availablility 2Q2018).

Workarounds and Mitigations

none

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support
alerts like this.

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.

References

Complete CVSS v3 Guide

On-line Calculator v3



Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog



Change History

19 July 2017: 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.

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