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

Security Bulletin


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

However we have combined these 3 APARs into one interim fix PI82481 for you to apply.

For V9.0.0.0 through 9.0.0.4:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI82481

--OR--
· Apply Fix Pack 9.0.0.5 or later.


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.


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.

Workarounds and Mitigations

none

Get Notified about Future Security Bulletins

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.

Related information

A Japanese translation is available

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: 30 October 2017


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