10 - GLSA-200903-23

Synopsis

Multiple vulnerabilities have been identified, the worst of which allow arbitrary code execution on a user's system via a malicious Flash file.

Background

The Adobe Flash Player is a renderer for the popular SWF file format, which is commonly used to provide interactive websites, digital experiences and mobile content.

Description

Multiple vulnerabilities have been discovered in Adobe Flash Player:

* The access scope of SystemsetClipboard() allows ActionScript programs to execute the method without user interaction (CVE-2008-3873).

* The access scope of FileReference.browse() and FileReference.download() allows ActionScript programs to execute the methods without user interaction (CVE-2008-4401).

* The Settings Manager controls can be disguised as normal graphical elements. This so-called "clickjacking" vulnerability was disclosed by Robert Hansen of SecTheory, Jeremiah Grossman of WhiteHat Security, Eduardo Vela, Matthew Mastracci of DotSpots, and Liu Die Yu of TopsecTianRongXin (CVE-2008-4503).

* Matthew Dempsky reported a null-pointer dereference flaw when loading two SWF files compiled with different Flash versions from the same URI (CVE-2008-4546).

* Adan Barth (UC Berkely) and Collin Jackson (Stanford University)
discovered a flaw occurring when interpreting HTTP response headers (CVE-2008-4818).

* Nathan McFeters and Rob Carter of Ernst and Young's Advanced Security Center are credited for finding an unspecified vulnerability facilitating DNS rebinding attacks (CVE-2008-4819).

* When used in a Mozilla browser, Adobe Flash Player does not properly interpret jar: URLs, according to a report by Gregory Fleischer of pseudo-flaw.net (CVE-2008-4821).

* Alex "kuza55" K. reported that Adobe Flash Player does not properly interpret policy files (CVE-2008-4822).

* The vendor credits Stefano Di Paola of Minded Security for reporting that an ActionScript attribute is not interpreted properly (CVE-2008-4823).

* Riley Hassell and Josh Zelonis of iSEC Partners reported multiple input validation errors (CVE-2008-4824).

* The aforementioned researchers also reported that ActionScript 2
does not verify a member element's size when performing several known and other unspecified actions, that DefineConstantPool accepts an untrusted input value for a "constant count" and that character elements are not validated when retrieved from a data structure,
possibly resulting in a null-pointer dereference (CVE-2008-5361,
CVE-2008-5362, CVE-2008-5363).

* The vendor reported an unspecified arbitrary code execution vulnerability (CVE-2008-5499).

* Liu Die Yu of TopsecTianRongXin reported an unspecified flaw in the Settings Manager related to "clickjacking" (CVE-2009-0114).

* The vendor credits Roee Hay from IBM Rational Application Security for reporting an input validation error when processing SWF files (CVE-2009-0519).

* Javier Vicente Vallejo reported via the iDefense VCP that Adobe Flash does not remove object references properly, leading to a freed memory dereference (CVE-2009-0520).

* Josh Bressers of Red Hat and Tavis Ormandy of the Google Security Team reported an untrusted search path vulnerability (CVE-2009-0521).

Impact

A remote attacker could entice a user to open a specially crafted SWF file, possibly resulting in the execution of arbitrary code with the privileges of the user or a Denial of Service (crash). Furthermore a remote attacker could gain access to sensitive information, disclose memory contents by enticing a user to open a specially crafted PDF file inside a Flash application, modify the victim's clipboard or render it temporarily unusable, persuade a user into uploading or downloading files, bypass security restrictions with the assistance of the user to gain access to camera and microphone, conduct Cross-Site Scripting and HTTP Header Splitting attacks, bypass the "non-root domain policy" of Flash, and gain escalated privileges.

Workaround

There is no known workaround at this time.

Resolution

All Adobe Flash Player users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-www/netscape-flash-10.0.22.87"

References

[ 1 ] CVE-2008-3873 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3873
[ 2 ] CVE-2008-4401 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4401
[ 3 ] CVE-2008-4503 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4503
[ 4 ] CVE-2008-4546 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4546
[ 5 ] CVE-2008-4818 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4818
[ 6 ] CVE-2008-4819 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4819
[ 7 ] CVE-2008-4821 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4821
[ 8 ] CVE-2008-4822 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4822
[ 9 ] CVE-2008-4823 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4823
[ 10 ] CVE-2008-4824 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4824
[ 11 ] CVE-2008-5361 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5361
[ 12 ] CVE-2008-5362 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5362
[ 13 ] CVE-2008-5363 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5363
[ 14 ] CVE-2008-5499 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5499
[ 15 ] CVE-2009-0114 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0114
[ 16 ] CVE-2009-0519 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0519
[ 17 ] CVE-2009-0520 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0520
[ 18 ] CVE-2009-0521 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0521

Availability

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

http://security.gentoo.org/glsa/glsa-200903-23.xml