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Security Bulletin: Potential Security exposure in IBM HTTP Server CVE-2013-1862 PM87808

Flashes (Alerts)


Potential Security exposure in IBM HTTP Server for WebSphere Application Server



CVE ID: CVE-2013-1862

IBM HTTP Server optional mod_rewrite module does not properly filter terminal escape sequences from logs, which could make it easier for a remote attacker to insert those sequences into terminal emulators containing vulnerabilities related to escape sequences.


CVSS Base Score: 5.1
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:N/AC:H/Au:N/C:P/I:P/A:P)

This problem affects the IBM HTTP Server component in all editions of WebSphere Application Server and bundling products:
· Version 8.5
· Version 8
· Version 7
· Version 6.1

REMEDIATION: The recommended solution is to apply the Fix Pack or PTF for each named product as soon as practical

Fix:Apply a Fix Pack or PTF containing this APAR PM87808, as noted below:

For affected IBM HTTP Server for WebSphere Application Server:

For V8.5.0.0 through Full Profile:

  • Apply Interim Fix PM87808

  • --OR--
  • Apply Fix Pack or later.
  • For V8.0 through

  • Apply Interim Fix PM87808

  • --OR--
  • Apply Fix Pack or later.

  • For V7.0.0.0 through
  • Apply Interim Fix PM87808

  • --OR--
  • Apply Fix Pack or later.

  • For V6.1.0.0 through
  • Apply Interim Fix PM87808

  • --OR--
  • Apply Fix Pack or later.
  • · Workaround(s): None

    · Mitigation(s): Do not use a terminal emulator to view the log files produced by the optional mod_rewrite module.

    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.

    For additional details and information on WebSphere Application Server product updates:
  • For Distributed, see Recommended fixes for WebSphere Application Server.

    · Complete CVSS Guide
    · On-line Calculator V2

    · 12 August 2013: Original copy 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 Flash.

    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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    Document Information

    Modified date:
    15 June 2018