CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
99.5%
Adobe Flash contains a vulnerability that can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.
The following versions of Adobe Flash versions contain an unspecified vulnerability that can result in memory corruption:
* Adobe Flash Player 10.2.153.1 and earlier versions for Windows, Macintosh, Linux and Solaris operating systems
* Adobe Flash Player 10.2.154.25 and earlier for Google Chrome users
* Adobe Flash Player 10.2.156.11 and earlier for Android
* The Authplay.dll component that ships with Adobe Reader and Acrobat X (10.0.2) and earlier 10.x and 9.x versions for Windows and Macintosh operating systems.
This vulnerability is being actively exploited in the wild. Exploit code for this vulnerability is publicly available as well.
By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), PDF file, Microsoft Office document, or any other document that supports embedded SWF content, an attacker may be able to execute arbitrary code.
Apply an update
This issue is addressed in Adobe Flash Player 10.2.159.1. Please see Adobe Security bulletin APSB11-07 for more details. Adobe Reader 9.4.4 and Reader X 10.0.3 provide an updated Flash runtime to address this issue. Please see Adobe Security Bulletin APSB11-08 for more details. Please also consider the following workarounds to mitigate this and other Flash vulnerabilities:
Use the Microsoft Enhanced Mitigation Experience Toolkit
The Microsoft Enhanced Mitigation Experience Toolkit (EMET) can be used to help prevent exploitation of this and other vulnerabilities. Additional information can be found in the Microsoft Security Research & Defense blog. Additional workarounds include:
Disable Flash in your web browser
Disable Flash or selectively enable Flash content as described in Securing Your Web Browser.
Disable Flash and 3D & Multimedia support in Adobe Reader 9 and later
Flash and 3D & Multimedia support are implemented as plug-in libraries in Adobe Reader. Disabling Flash in Adobe Reader will only mitigate attacks that use an SWF embedded in a PDF file. Disabling 3D & Multimedia support does not directly address the vulnerability, but it does provide additional mitigation and results not in a crash but in a more user-friendly error message.
To disable Flash and 3D & Multimedia support in Adobe Reader 9 on Microsoft Windows, delete or rename these files:
"%ProgramFiles%\Adobe\Reader 9.0\Reader\authplay.dll"
"%ProgramFiles%\Adobe\Reader 9.0\Reader\rt3d.dll"
For Apple Mac OS X, delete or rename these files:
"/Applications/Adobe Reader 9/Adobe Reader.app/Contents/Frameworks/AuthPlayLib.bundle"
"/Applications/Adobe Reader 9/Adobe Reader.app/Contents/Frameworks/Adobe3D.framework"
For GNU/Linux, delete or rename these files (locations may vary among distributions):
"/opt/Adobe/Reader9/Reader/intellinux/lib/libauthplay.so"
"/opt/Adobe/Reader9/Reader/intellinux/lib/librt3d.so"
NOTE: Adobe states that this particular vulnerability does not affect the authplay component supplied with Reader for Linux. The steps listed above are being provided for users who wish to proactively disable the 3D and multimedia support in the version of Reader for Linux.
For versions of Adobe Reader newer than 9, please adjust the above file paths accordingly. File locations may be different for Adobe Acrobat or other Adobe products that include Flash and 3D & Multimedia support. Disabling these plug-ins will reduce functionality and will not protect against SWF files hosted on websites. Depending on the update schedule for products other than Flash Player, consider leaving Flash and 3D & Multimedia support disabled unless they are absolutely required.
Remove Flash
Adobe has provided a TechNote with utilities for uninstalling the Flash Player plug-in and ActiveX control on Windows and Mac OS X systems. Removing these components can mitigate the web browser attack vector for this vulnerability. Note that this will not remove the instances of Flash Player that are installed with Adobe Reader or other Adobe products.
Disable JavaScript in Adobe Reader and Acrobat
Disabling JavaScript can help mitigate some techniques that use Adobe Reader as an attack vector.
To disable JavaScript in Adobe Reader:
Edit
menu.Preferences...
option.JavaScript
section.Enable Acrobat JavaScript
checkbox.Prevent Internet Explorer from automatically opening PDF documents
The installer for Adobe Reader and Acrobat configures Internet Explorer to automatically open PDF files without any user interaction. This behavior can be reverted to the safer option of prompting the user by importing the following as a .REG file:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\AcroExch.Document.7]
"EditFlags"=hex:00,00,00,00
Disable the displaying of PDF documents in the web browser
Preventing PDF documents from opening inside a web browser reduces the attack surface. If this workaround is applied to updated versions of Adobe Reader and Acrobat, it may protect against future vulnerabilities.
To prevent PDF documents from automatically opening in a web browser with Adobe Reader:
Edit
menu.Preferences...
option.Internet
section.Display PDF in browser
checkbox.230057
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Updated: April 21, 2011
Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
Thanks to Adobe for reporting this vulnerability.
This document was written by Will Dormann.
CVE IDs: | CVE-2011-0611 |
---|---|
Severity Metric: | 46.47 Date Public: |
blogs.technet.com/b/srd/archive/2011/03/17/blocking-exploit-attempts-of-the-recent-flash-0-day.aspx
www.adobe.com/support/security/advisories/apsa11-02.html
www.adobe.com/support/security/bulletins/apsb11-07.html
www.adobe.com/support/security/bulletins/apsb11-08.html
www.microsoft.com/downloads/en/details.aspx?FamilyID=c6f0a6ee-05ac-4eb6-acd0-362559fd2f04
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
99.5%