TITLE:
Firefox Multiple Vulnerabilities
SECUNIA ADVISORY ID:
SA20376
VERIFY ADVISORY:
http://secunia.c
om/advisories/20376/
CRITICAL:
Highly critical
IMPACT:
Security Bypass, Cross Site Scripting, System access
WHERE:
From remote
SOFTWARE:
Mozilla Firefox 1.x
http://secunia.com/p
roduct/4227/
Mozilla Firefox 0.x
http://secunia.com/p
roduct/3256/
DESCRIPTION:
Multiple vulnerabilities have been reported in Firefox,
which
can be
exploited by malicious people to bypass certain security
restrictions, conduct cross-site scripting and HTTP response
smuggling attacks, and potentially compromise a user's
system.
1) An error in the sandbox protection of JavaScript run via
EvalInSandbox can be exploited to execute arbitrary
JavaScript
code
with escalated privileges by calling the
"valueOf()" function
on
external objects outside of the sandbox.
Successful exploitation requires that the attacker is able
to
execute
JavaScript code inside the EvalInSandbox (e.g. via a Proxy
Autoconfig
script or a third-party extension using the vulnerable
functionality).
2) Some errors in the browser engine can be exploited to
cause
a
memory corruption.
Successful exploitation may allow execution of arbitrary
code.
3) Two errors in the handling of specially crafted HTTP
responses in
certain situations can be exploited to cause the browser to
process a
response as two separate responses from different sites.
Successful exploitation allows execution of arbitrary HTML
and
script
in a user's browser session in context of an arbitrary
site,
but
requires that the browser is configured to use a proxy or
that
the
malicious site shares the same IP address as the targeted
site.
4) Two errors in the handling of the "View
Image" and "Show
only this
frame" functionalities can be exploited to execute
arbitrary
HTML and
script code in a user's browser session in context of an
arbitrary
site by e.g. tricking a user into right-clicking and
choosing
"View
Image" on a broken image.
5) An error caused due to persisted XUL attributes in
certain
situations being associated with an incorrect URL can be
exploited to
execute arbitrary JavaScript code with escalated privileges.
6) An error caused due to content-defined setters on an
object
prototype being called by privileged code in the user
interface
can
be exploited to execute arbitrary JavaScript code with
escalated
privileges.
7) An error caused due to an off-by-two array boundary error
in
the
"crypto.signText()" function can be exploited to
cause a buffer
overflow by passing optional Certificate Authority name
arguments.
8) An error exists due to Unicode Byte-order-Mark (BOM) data
being
stripped from documents served in UTF-8 during the
conversion
to
Unicode. This can be exploited to bypass certain HTML and
JavaScript
filtering mechanisms in web applications using the UTF-8
character
encoding.
9) An error in the processing of the addSelectionListener
when
handling notifications in certain situations can be
exploited
to
execute arbitrary JavaScript code with escalated privileges.
SOLUTION:
Update to version 1.5.0.4.
http://www.mozilla.co
m/firefox/
ORIGINAL ADVISORY:
1)
http://www.mozilla.org/security/announce/2006/mfsa
2006-31.html
2)
http://www.mozilla.org/security/announce/2006/mfsa
2006-32.html
3)
http://www.mozilla.org/security/announce/2006/mfsa
2006-33.html
4)
http://www.mozilla.org/security/announce/2006/mfsa
2006-34.html
5)
http://www.mozilla.org/security/announce/2006/mfsa
2006-35.html
6)
http://www.mozilla.org/security/announce/2006/mfsa
2006-37.html
7)
http://www.mozilla.org/security/announce/2006/mfsa
2006-38.html
8)
http://www.mozilla.org/security/announce/2006/mfsa
2006-42.html
9)
http://www.mozilla.org/security/announce/2006/mfsa
2006-43.html
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