Vulnerability Note VU#912420

IBM Notes runs arbitrary JAVA and Javascript in emails

Original Release date: 30 Apr 2013 | Last revised: 30 Jul 2014

Overview

IBM Notes parses arbitrary JAVA and Javascript code by default when viewing emails.

Description

The n.runs AG security advisory states:

    Notes 8.5.3 does not filter <applet> tags inside HTML emails. This can be used to load arbitrary Java applets from remote sources (making it an information disclosure as well as this can be used to trigger an HTTP request once the mail is previewed/opened).

Additional details may be found in the full n.runs AG security advisory. It should also be noted that the IBM JRE that comes with the latest patched version of IBM Notes is IBM JRE 6 SR12 while IBM JRE 6 SR13 has been released and includes many security related fixes.

Impact

A remote unauthenticated attack may be able to execute arbitrary code in the context of the user viewing emails within IBM Notes.

Solution

Apply an Update

IBM's Security Bulletin states:

    The fix will be included in Interim Fix 1 for 8.5.3 Fix Pack 4 and 9.0 Interim Fix 1.
The fix disables loading of JAVA applets for emails that originated from the Internet. Please consider the following workarounds if you are unable to upgrade. We also recommend all users implement the following workarounds if they do not have a need for JAVA & Javascript within Notes.

The following directives should be set to zero in notes.ini to reduce the attack surface.

  • EnableJavaApplets=0
  • EnableJavaScript=0
  • EnableLiveConnect=0

Although not needed to mitigate this vulnerability, if plugins are not needed we recommend the following directive also be set to zero.
  • EnablePlugins=0

Alternatively, in Notes Basic Preferences, deselect the following three preferences:
  • Enable Java applets
  • Enable Java access from JavaScript
  • Enable JavaScript

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
IBM CorporationAffected19 Mar 201329 Apr 2013
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
Temporal 5.0 E:ND/RL:OF/RC:C
Environmental 3.8 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

Credit

Thanks to Alexander Klink for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

  • CVE IDs: CVE-2013-0127 CVE-2013-0538
  • Date Public: 30 Apr 2013
  • Date First Published: 30 Apr 2013
  • Date Last Updated: 30 Jul 2014
  • Document Revision: 43

Feedback

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