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  3. Webkit Floating Point Datatype Remote Code Execution Vulnerability

Webkit Floating Point Datatype Remote Code Execution Vulnerability

Risk

High

Date Discovered

September 7, 2010

Description

WebKit is prone to a remote code-execution vulnerability. Successful exploits will allow an attacker to run arbitrary code in the context of the user running the application. Failed attacks will cause denial-of-service conditions. Versions prior to Safari 5.0.2 and Safari 4.1.2 are vulnerable.

Technologies Affected

  • Apple Safari 4
  • Apple Safari 4 Beta
  • Apple Safari 4 For Windows
  • Apple Safari 4.0.1
  • Apple Safari 4.0.2
  • Apple Safari 4.0.2 For Windows
  • Apple Safari 4.0.3
  • Apple Safari 4.0.3 For Windows
  • Apple Safari 4.0.4
  • Apple Safari 4.0.4 For Windows
  • Apple Safari 4.0.5
  • Apple Safari 4.0.5 For Windows
  • Apple Safari 4.1
  • Apple Safari 4.1.1
  • Apple Safari 5.0
  • Apple Safari 5.0 For Windows
  • Apple Safari 5.0.1
  • Apple Safari 5.0.1 for Windows
  • Apple iOS 3.2
  • Apple iOS 3.2.1
  • Apple iOS 3.2.2
  • Apple iOS 4
  • Apple iOS 4.0.1
  • Apple iOS 4.0.2
  • Apple iOS 4.1
  • Apple iOS 4.2 beta
  • Apple iPad
  • Apple iPad 3.2
  • Apple iPad 3.2.1
  • Apple iPad 3.2.2
  • Apple iPhone 2.0
  • Apple iPhone 2.0.1
  • Apple iPhone 2.0.2
  • Apple iPhone 2.1
  • Apple iPhone 2.2
  • Apple iPhone 2.2.1
  • Apple iPhone 3.0
  • Apple iPhone 3.0.1
  • Apple iPhone 3.1
  • Apple iPhone 3.1.2
  • Apple iPhone 3.1.3
  • Apple iPhone 3.2
  • Apple iPhone 3.2.1
  • Apple iPhone 4.0
  • Apple iPhone 4.0.1
  • Apple iPhone 4.1
  • Apple iPod Touch 2.1
  • Apple iPod Touch 2.2
  • Apple iPod Touch 2.2.1
  • Apple iPod Touch 3.0
  • Apple iPod Touch 3.1.1
  • Apple iPod Touch 3.1.2
  • Apple iPod Touch 3.1.3
  • Mandriva Linux Mandrake 2010.1
  • Mandriva Linux Mandrake 2010.1 X86 64
  • Open Handset Alliance Android 2.0.1
  • Open Handset Alliance Android 2.1
  • Red Hat Enterprise Linux Desktop 6
  • Red Hat Enterprise Linux Desktop Optional 6
  • Red Hat Enterprise Linux HPC Node Optional 6
  • Red Hat Enterprise Linux Server 6
  • Red Hat Enterprise Linux Server Optional 6
  • Red Hat Enterprise Linux Workstation 6
  • Red Hat Enterprise Linux Workstation Optional 6
  • Red Hat Fedora 12
  • Red Hat Fedora 13
  • SuSE openSUSE 11.2
  • SuSE openSUSE 11.3
  • Ubuntu Ubuntu Linux 10.04 Amd64
  • Ubuntu Ubuntu Linux 10.04 I386
  • Ubuntu Ubuntu Linux 10.04 Powerpc
  • Ubuntu Ubuntu Linux 10.04 Sparc
  • Ubuntu Ubuntu Linux 10.10 amd64
  • Ubuntu Ubuntu Linux 10.10 i386
  • Ubuntu Ubuntu Linux 10.10 powerpc
  • Ubuntu Ubuntu Linux 9.10 Amd64
  • Ubuntu Ubuntu Linux 9.10 I386
  • Ubuntu Ubuntu Linux 9.10 Lpia
  • Ubuntu Ubuntu Linux 9.10 Powerpc
  • Ubuntu Ubuntu Linux 9.10 Sparc
  • WebKit Open Source Project WebKit
  • WebKit Open Source Project WebKit 1.2.2
  • WebKit Open Source Project WebKit 1.2.2-1
  • WebKit Open Source Project WebKit 1.2.3

Recommendations

Run all software as a nonprivileged user with minimal access rights.

To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Do not follow links provided by unknown or untrusted sources.

Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Set web browser security to disable the execution of script code or active content.

Since a successful exploit of this issue requires malicious code to execute in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.

Implement multiple redundant layers of security.

Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
Updates are available. Please see the references for more information.

Credits

Luke Wagner of Mozilla
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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