Date Discovered July 21, 2009
Description Adobe Acrobat, Reader, and Flash Player are prone to a remote code-execution vulnerability.
An attacker can exploit this issue by supplying a malicious Flash ('.swf') file or by embedding a malicious Flash application in a PDF file. Successful exploits may allow the attacker to execute arbitrary code in the context of the user running the affected application. Failed attempts will likely result in denial-of-service conditions.
UPDATE (September 4, 2009): Mac OS X 10.6 reportedly ships with Flash Player 10.0.23.1, which will overwrite any installed version of Flash Player when Mac OS X is being installed.
The issue affects the following:
Reader and Acrobat 9.1.2
Flash Player 9 and 10
Run all software as a nonprivileged user with minimal access rights. To reduce the impact of latent vulnerabilities, run the application with the minimal amount of privileges required for functionality.
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 including unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Do not accept or execute files from untrusted or unknown sources. To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.
Do not follow links provided by unknown or untrusted sources. To reduce the likelihood of attacks, never visit sites of questionable integrity or follow links provided by unfamiliar or untrusted sources.
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 code-execution vulnerabilities to execute arbitrary code.
Updates are available. Please see the references for more information.
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