From: Raphael Marichez (falcogentoo.org)
Date: Wed Aug 22 2007 - 17:41:22 CDT

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Gentoo Linux Security Advisory GLSA 200708-17
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                                            http://security.gentoo.org/
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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
securitygentoo.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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