A vulnerability in the ActionScript 3 ByteArray class used by Adobe Flash Player could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability is due to insufficient validation of user-supplied input by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to open a link to a malicious website that contains crafted Flash content. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the user. If the user holds elevated privileges, this could result in a complete system compromise.
Functional code that exploits this vulnerability is available as part of the Metasploit framework.
Adobe has confirmed this vulnerability and software updates are available.
Indicators of Compromise
The following Adobe products are affected:
Adobe Flash Player Desktop Runtime 22.214.171.124 and prior for Windows and Macintosh
Adobe Flash Player Extended Support Release 126.96.36.1996 and prior for Windows and Macintosh
Adobe Flash Player 188.8.131.528 and prior for Linux
Adobe AIR Desktop Runtime 184.108.40.206 and prior
Adobe AIR SDK and Compiler 220.127.116.11 and prior
The vulnerability is due to a use-after-free condition that could exist in the ActionScript 3 ByteArray class used by the affected software. The condition is caused by insufficient validation of user-supplied input. Exploitation could allow an attacker to manipulate memory, causing memory corruption that the attacker could use to execute arbitrary code.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to open a link to a malicious website that contains crafted Flash content. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the user. If the user holds elevated privileges, this could result in a complete system compromise.
To exploit the vulnerability, the attacker may provide the user with a link to a malicious website or a file containing crafted Flash content intended to submit malicious input to the affected software and use misleading language or instructions to persuade the user to follow the link or open the file.
Reports indicate that functional code that exploits this vulnerability exists and is currently being used in the wild in targeted attacks.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to monitor affected systems.
Red Hat has released updated software for registered subscribers at the following link: Red Hat Network. Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.
Red Hat Enterprise Linux Workstation Supplementary
6 (IA-32, x86_64)
5 (IA-32, IA-64, PPC, PPC64, S390, S390x, x86_64)
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.