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AUSCERT External Security Bulletin Redistribution
ESB-2008.0367 -- [Win][UNIX/Linux]
APSB08-11 Flash Player update available to address security vulnerabilities
9 April 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: Flash Player 9.0.115.0 and earlier
Flex 3.0
AIR 1.0
Publisher: Adobe
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact: Execute Arbitrary Code/Commands
Provide Misleading Information
Cross-site Request Forgery
Cross-site Scripting
Access: Remote/Unauthenticated
CVE Names: CVE-2008-1655 CVE-2008-1654 CVE-2007-6637
CVE-2007-6243 CVE-2007-6019 CVE-2007-5275
CVE-2007-0071
Ref: ESB-2008.0361
Original Bulletin:
http://www.adobe.com/support/security/bulletins/apsb08-11.html
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Adobe Security Bulletin APSB08-11
Flash Player update available to address security vulnerabilities
Release date: April 8, 2008
Vulnerability identifier: APSB08-11
CVE number: CVE-2007-5275, CVE-2007-6243, CVE-2007-6637, CVE-2007-6019,
CVE-2007-0071, CVE-2008-1655, CVE-2008-1654
Platform: All Platforms
Summary
Critical vulnerabilities have been identified in Adobe Flash Player that
could allow an attacker who successfully exploits these potential
vulnerabilities to take control of the affected system. A malicious SWF
must be loaded in Flash Player by the user for an attacker to exploit
these potential vulnerabilities. It is recommended users update to the
most current version of Flash Player available for their operating system.
Due to the possibility that these security enhancements and changes may
impact existing Flash content, content developers are advised to review
this March 2008 Adobe Developer Center article to determine if the
changes will affect their content, and to begin implementing necessary
changes immediately to help ensure a seamless transition.
Affected software versions
Adobe Flash Player 9.0.115.0 and earlier, and 8.0.39.0 and earlier.
To verify the Adobe Flash Player version number, access the About Flash
Player page, or right-click on Flash content and select About Adobe
(or Macromedia) Flash Player from the menu. Customers using multiple
browsers are advised to perform the check for each browser installed
on their system.
Solution
Adobe recommends all users of Adobe Flash Player 9.0.115.0 and earlier
versions upgrade to the newest version 9.0.124.0, by downloading it from
the Player Download Center, or by using the auto-update mechanism within
the product when prompted.
Severity rating
Adobe categorizes this as a critical update and recommends affected users
upgrade to version 9.0.124.0.
Details
This update addresses input validation errors which have been identified
in Flash Player 9.0.115.0 and earlier versions that could lead to the
potential execution of arbitrary code. These vulnerabilities could be
accessed through content delivered from a remote location via the users
web browser, email client, or other applications that include or
reference the Flash Player. (CVE-2007-0071, CVE-2007-6019)
This update introduces functionality to mitigate potential issues that
could aid an attacker in executing a DNS rebinding attack. For more
information, see the following Adobe Developer Center article:
http://www.adobe.com/devnet/flashplayer/articles/fplayer9_security.html#goal_dns
(CVE-2007-5275, CVE-2008-1655)
This update introduces a new, more conservative method for Flash Player to
interpret cross-domain policy files. These changes could help prevent
privilege escalation attacks against web servers hosting Flash content and
cross-domain policy files. For more information, see the following Adobe
Developer Center article:
http://www.adobe.com/devnet/flashplayer/articles/fplayer9_security.html#goal_control
(CVE-2007-6243)
This update adds a new security feature to perform a cross-domain policy
file check before allowing SWFs to send HTTP headers to another domain.
This change helps improve web site security by helping to defend against
malicious HTTP headers sent by content from other domains. For more
information, see the following TechNote:
http://www.adobe.com/go/kb403185
(CVE-2008-1654)
With this update, the allowScriptAccess default, which is used when the
parameter is not specified, will be updated from "always" to "sameDomain"
for all SWFs version 7 and earlier. This changes the behavior of older
SWFs to match the current security model and provide greater security by
default. In addition, to help prevent script execution actions in SWFs
that were not intended by the content author, APIs that are not
specifically designed for browser interaction will no longer allow
"javascript:" URLs. The getURL() and navigateToURL() APIs, which are
intended for browser interaction, will continue to accept javascript:
URLs. These changes are meant to mitigate issues originally described in
Security Advisory APSA07-06:
http://www.adobe.com/go/apsa07-06
(CVE-2007-6637)
Due to the possibility that these security enhancements and changes may
impact existing Flash content, customers are advised to review this March
2008 Adobe Developer Center article:
http://www.adobe.com/devnet/flashplayer/articles/flash_player9_security_update.html
to determine if the changes will affect their content, and to begin
implementing necessary changes immediately to help ensure a seamless
transition.
Customers for whom the following situations apply should read the article
in detail:
o Use of sockets or XMLSockets, regardless of the domain to which the
SWF is connecting.
o Use of addRequestHeader or URLRequest.requestHeaders in any network
API call when sending or loading data cross-domain OR Provides access
to content on remote domains as a web service provider.
o Use of SWFs that are exported for Flash Player 7 (SWF7) or below that
communicate with the hosting HTML by any means.
o Use of javascript: through network APIs to communicate outside a SWF.
=============================================================================
Affected software | Recommended player update | Availability
=============================================================================
Flash Player 9.0.115.0 | |
and earlier | 9.0.124.0 | Player Download Center
Flash Player 9.0.115.0 | |
and earlier - | |
network distribution | 9.0.124.0 | Player Licensing
Flex 3.0 | 9.0.124.0 | Flash Debug Player
| | Updater
AIR 1.0 | 1.0.1 | AIR Download Center
=============================================================================
Acknowledgments
Adobe would like to thank Alin Rad Pop of Secunia Research and Javier
Vicente Vallejo and Shane Macaulay reported through TippingPoint's Zero
Day Initiative for reporting an input validation error and for working
with us to help protect our mutual customers security. (CVE-2007-6019)
Adobe would like to thank Mark Dowd of the ISS X-Force and wushi of team509
reported through TippingPoint's Zero Day Initiative for reporting an
input validation error and for working with us to help protect our mutual
customers security. (CVE-2007-0071)
Adobe would like to thank Dan Boneh, Adam Barth, Andrew Bortz, Collin
Jackson, and Weidong Shao of Stanford University for reporting a DNS
rebinding issue and for working with us to help protect our customers
security. (CVE-2007-5275)
Adobe would like to thank Nathan McFeters and Rob Carter of Ernst and
Youngs Advanced Security Center for reporting a DNS rebinding issue and
for working with us to help protect our customers security. (CVE-2008-1654)
Adobe would like to thank Tom Gallagher of Microsoft for reporting the
HTTP header issue and for working with us to help protect our customers
security. (CVE-2008-1655)
Adobe would like to thank Toshiharu Sugiyama of UBsecure, Inc. and
JPCERT/CC for reporting the cross-domain policy file issue and for working
with us to help protect our mutual customers security. (CVE-2007-6243)
Adobe would like to thank Rich Cannings of the Google Security Team and
Stefano Di Paola of Minded Security for reporting potential cross-site
scripting vulnerabilities in SWFs. (CVE-2007-6637)
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