Adobe Flash Player: Multiple vulnerabilities

1.  Gentoo Linux Security Advisory

Version Information

Related bugreports: #239543, #251496, #260264

Synopsis

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

2.  Impact Information

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).
• 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.

3.  Resolution Information

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 ">=www-plugins/adobe-flash-10.0.22.87"

4.  References

• CVE-2008-3873
• CVE-2008-4401
• CVE-2008-4503
• CVE-2008-4818
• CVE-2008-4819
• CVE-2008-4821
• CVE-2008-4822
• CVE-2008-4823
• CVE-2008-4824
• CVE-2008-5361
• CVE-2008-5362
• CVE-2008-5363
• CVE-2008-5499
• CVE-2009-0114
• CVE-2009-0519
• CVE-2009-0520
• CVE-2009-0521