Mandriva Linux Security Advisory : firefox (MDVSA-2010:251-2)

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Synopsis :

The remote Mandriva Linux host is missing one or more security

Description :

Security issues were identified and fixed in firefox :

Security researchers Yosuke Hasegawa and Masatoshi Kimura reported
that the x-mac-arabic, x-mac-farsi and x-mac-hebrew character
encodings are vulnerable to XSS attacks due to some characters being
converted to angle brackets when displayed by the rendering engine.
Sites using these character encodings would thus be potentially
vulnerable to script injection attacks if their script filtering code
fails to strip out these specific characters (CVE-2010-3770).

Google security researcher Michal Zalewski reported that when a window
was opened to a site resulting in a network or certificate error page,
the opening site could access the document inside the opened window
and inject arbitrary content. An attacker could use this bug to spoof
the location bar and trick a user into thinking they were on a
different site than they actually were (CVE-2010-3774).

Mozilla security researcher moz_bug_r_a4 reported that the fix for
CVE-2010-0179 could be circumvented permitting the execution of
arbitrary JavaScript with chrome privileges (CVE-2010-3773).

Security researcher regenrecht reported via TippingPoint's Zero Day
Initiative that JavaScript arrays were vulnerable to an integer
overflow vulnerability. The report demonstrated that an array could be
constructed containing a very large number of items such that when
memory was allocated to store the array items, the integer value used
to calculate the buffer size would overflow resulting in too small a
buffer being allocated. Subsequent use of the array object could then
result in data being written past the end of the buffer and causing
memory corruption (CVE-2010-3767).

Security researcher regenrecht reported via TippingPoint's Zero Day
Initiative that a nsDOMAttribute node can be modified without
informing the iterator object responsible for various DOM traversals.
This flaw could lead to a inconsistent state where the iterator points
to an object it believes is part of the DOM but actually points to
some other object. If such an object had been deleted and its memory
reclaimed by the system, then the iterator could be used to call into
attacker-controlled memory (CVE-2010-3766).

Security researcher Gregory Fleischer reported that when a Java
LiveConnect script was loaded via a data: URL which redirects via a
meta refresh, then the resulting plugin object was created with the
wrong security principal and thus received elevated privileges such as
the abilities to read local files, launch processes, and create
network connections (CVE-2010-3775).

Mozilla added the OTS font sanitizing library to prevent downloadable
fonts from exposing vulnerabilities in the underlying OS font code.
This library mitigates against several issues independently reported
by Red Hat Security Response Team member Marc Schoenefeld and Mozilla
security researcher Christoph Diehl (CVE-2010-3768).

Security researcher wushi of team509 reported that when a XUL tree had
an HTML \<div\> element nested inside a \<treechildren\> element then
code attempting to display content in the XUL tree would incorrectly
treat the \<div\> element as a parent node to tree content underneath
it resulting in incorrect indexes being calculated for the child
content. These incorrect indexes were used in subsequent array
operations which resulted in writing data past the end of an allocated
buffer. An attacker could use this issue to crash a victim's browser
and run arbitrary code on their machine (CVE-2010-3772).

Security researcher echo reported that a web page could open a window
with an about:blank location and then inject an \<isindex\> element
into that page which upon submission would redirect to a chrome:
document. The effect of this defect was that the original page would
wind up with a reference to a chrome-privileged object, the opened
window, which could be leveraged for privilege escalation attacks

Dirk Heinrich reported that on Windows platforms when document.write()
was called with a very long string a buffer overflow was caused in
line breaking routines attempting to process the string for display.
Such cases triggered an invalid read past the end of an array causing
a crash which an attacker could potentially use to run arbitrary code
on a victim's computer (CVE-2010-3769).

Mozilla developers identified and fixed several memory safety bugs in
the browser engine used in Firefox and other Mozilla-based products.
Some of these bugs 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-2010-3776,

Packages for 2009.0 are provided as of the Extended Maintenance
Program. Please visit this link to learn more:;products_id=4

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

Update :

A mistake was done with the MDVSA-2010:251 and the MDVSA-2010:251-1
advisories where the localization files for firefox software was NOT
updated to the 3.6.13 version. The secteam wishes to apologise for the
unfortunate mistake and also wishes everyone a great christmas.

Regards // Santa Claus

See also :

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 9.3
CVSS Temporal Score : 8.1
Public Exploit Available : true

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