Mandriva Linux Security Advisory : firefox (MDVSA-2010:070-1)

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Synopsis :

The remote Mandriva Linux host is missing one or more security
updates.

Description :

Security issues were identified and fixed in firefox :

Security researcher regenrecht reported (via TippingPoint's Zero Day
Initiative) a potential reuse of a deleted image frame in Firefox
3.6's handling of multipart/x-mixed-replace images. Although no
exploit was shown, re-use of freed memory has led to exploitable
vulnerabilities in the past (CVE-2010-0164).

Mozilla developers identified and fixed several stability bugs in the
browser engine used in Firefox and other Mozilla-based products. Some
of these crashes showed evidence of memory corruption under certain
circumstances and we presume that with enough effort at least some of
these could be exploited to run arbitrary code (CVE-2010-0165,
CVE-2010-0167).

Mozilla developer Josh Soref of Nokia reported that documents failed
to call certain security checks when attempting to preload images.
Although the image content is not available to the page, it is
possible to specify protocols that are normally not allowed in a web
page such as file:. This includes internal schemes implemented by
add-ons that might perform privileged actions resulting in something
like a Cross-Site Request Forgery (CSRF) attack against the add-on.
Potential severity would depend on the add-ons installed
(CVE-2010-0168).

Mozilla developer Blake Kaplan reported that the window.location
object was made a normal overridable JavaScript object in the Firefox
3.6 browser engine (Gecko 1.9.2) because new mechanisms were developed
to enforce the same-origin policy between windows and frames. This
object is unfortunately also used by some plugins to determine the
page origin used for access restrictions. A malicious page could
override this object to fool a plugin into granting access to data on
another site or the local file system. The behavior of older Firefox
versions has been restored (CVE-2010-0170).

Mozilla developer Justin Dolske reported that the new asynchronous
Authorization Prompt (HTTP username and password) was not always
attached to the correct window. Although we have not demonstrated
this, it may be possible for a malicious page to convince a user to
open a new tab or popup to a trusted service and then have the HTTP
authorization prompt from the malicious page appear to be the login
prompt for the trusted page. This potential attack is greatly
mitigated by the fact that very few websites use HTTP authorization,
preferring instead to use web forms and cookies (CVE-2010-0172).

Unspecified vulnerability in Mozilla Firefox 3.5.x through 3.5.8
allows remote attackers to cause a denial of service (memory
corruption and application crash) and possibly have unknown other
impact via vectors that might involve compressed data, a different
vulnerability than CVE-2010-1028 (CVE-2010-1122).

Mozilla developers identified and fixed several stability bugs in the
browser engine used in Firefox and other Mozilla-based products. Some
of these crashes showed evidence of memory corruption under certain
circumstances, and we presume that with enough effort at least some of
these could be exploited to run arbitrary code (CVE-2010-0173,
CVE-2010-0174)

Security researcher regenrecht reported via TippingPoint's Zero Day
Initiative that a select event handler for XUL tree items could be
called after the tree item was deleted. This results in the execution
of previously freed memory which an attacker could use to crash a
victim's browser and run arbitrary code on the victim's computer
(CVE-2010-0175).

Security researcher regenrecht reported via TippingPoint's Zero Day
Initiative an error in the way <option> elements are inserted into a
XUL tree <optgroup>. In certain cases, the number of references to an
<option> element is under-counted so that when the element is deleted,
a live pointer to its old location is kept around and may later be
used. An attacker could potentially use these conditions to run
arbitrary code on a victim's computer (CVE-2010-0176).

Security researcher regenrecht reported via TippingPoint's Zero Day
Initiative an error in the implementation of the
window.navigator.plugins object. When a page reloads, the plugins
array would reallocate all of its members without checking for
existing references to each member. This could result in the deletion
of objects for which valid pointers still exist. An attacker could use
this vulnerability to crash a victim's browser and run arbitrary code
on the victim's machine (CVE-2010-0177).

Security researcher Paul Stone reported that a browser applet could be
used to turn a simple mouse click into a drag-and-drop action,
potentially resulting in the unintended loading of resources in a
user's browser. This behavior could be used twice in succession to
first load a privileged chrome: URL in a victim's browser, then load a
malicious javascript: URL on top of the same document resulting in
arbitrary script execution with chrome privileges (CVE-2010-0178).

Mozilla security researcher moz_bug_r_a4 reported that the
XMLHttpRequestSpy module in the Firebug add-on was exposing an
underlying chrome privilege escalation vulnerability. When the
XMLHttpRequestSpy object was created, it would attach various
properties of itself to objects defined in web content, which were not
being properly wrapped to prevent their exposure to chrome privileged
objects. This could result in an attacker running arbitrary JavaScript
on a victim's machine, though it required the victim to have Firebug
installed, so the overall severity of the issue was determined to be
High (CVE-2010-0179).

phpBB developer Henry Sudhof reported that when an image tag points to
a resource that redirects to a mailto: URL, the external mail handler
application is launched. This issue poses no security threat to users
but could create an annoyance when browsing a site that allows users
to post arbitrary images (CVE-2010-0181).

Mozilla community member Wladimir Palant reported that XML documents
were failing to call certain security checks when loading new content.
This could result in certain resources being loaded that would
otherwise violate security policies set by the browser or installed
add-ons (CVE-2010-0182).

Note that to benefit from the fix for CVE-2009-3555 added in
nss-3.12.6, Firefox 3.6 users will need to set their
security.ssl.require_safe_negotiation preference to true. In Mandriva
the default setting is false due to problems with some common sites.

Since firefox-3.0.19 is the last 3.0.x release Mandriva opted to
provide the latest 3.6.3 version for Mandriva Linux
2008.0/2009.0/2009.1/MES5/2010.0.

Packages for 2008.0 and 2009.0 are provided due to the Extended
Maintenance Program for those products.

Additionally, some packages which require so, have been rebuilt and
are being provided as updates.

Update :

Packages for 2009.0 are provided due to the Extended Maintenance
Program.

See also :

http://www.nessus.org/u?78ee16de

Solution :

Update the affected packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 8.7
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

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