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Gentoo Linux Security Advisory                           GLSA 200708-17
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  Severity: Normal
     Title: Opera: Multiple vulnerabilities
      Date: August 22, 2007
      Bugs: #185497, #188987
        ID: 200708-17

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Synopsis
========

Opera contain several vulnerabilities, some of which may allow the
execution of arbitrary code.

Background
==========

Opera is a multi-platform web browser.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  www-client/opera       < 9.23                             >= 9.23

Description
===========

An error known as "a virtual function call on an invalid pointer" has
been discovered in the JavaScript engine (CVE-2007-4367). Furthermore,
iDefense Labs reported that an already-freed pointer may be still used
under unspecified circumstances in the BitTorrent support
(CVE-2007-3929). At last, minor other errors have been discovered,
relative to memory read protection (Opera Advisory 861) and URI
displays (CVE-2007-3142, CVE-2007-3819).

Impact
======

A remote attacker could trigger the BitTorrent vulnerability by
enticing a user into starting a malicious BitTorrent download, and
execute arbitrary code through unspecified vectors. Additionally, a
specially crafted JavaScript may trigger the "virtual function"
vulnerability. The JavaScript engine can also access previously freed
but uncleaned memory. Finally, a user can be fooled with a too long
HTTP server name that does not fit the dialog box, or a URI containing
whitespaces.

Workaround
==========

There is no known workaround at this time for all these
vulnerabilities.

Resolution
==========

All Opera users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-client/opera-9.23"

References
==========

  [ 1 ] CVE-2007-3142
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3142
  [ 2 ] CVE-2007-3819
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3819
  [ 3 ] CVE-2007-3929
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3929
  [ 4 ] CVE-2007-4367
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4367
  [ 5 ] Opera Advisory 861
        http://www.opera.com/support/search/view/861/

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200708-17.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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