CVE-2010-1297

What is Adobe Flash Player?

Adobe Flash Player was the browser plugin and runtime for executing SWF-format multimedia content. At its peak in 2010, Flash was installed on approximately 99% of internet-connected desktop computers and was the primary platform for web video, online games, interactive advertisements, and rich web applications. Flash's ubiquity made it an extremely high-value target — exploiting a Flash zero-day provided access to virtually every internet-connected desktop. Adobe ended support for Flash Player in December 2020, following years of critical security vulnerabilities that made it untenable as a web platform component.

Overview

CVE-2010-1297 is a high-severity memory corruption vulnerability (CWE-787, CVSS 7.8) in Adobe Flash Player. A specially crafted SWF file triggers an out-of-bounds write during Flash content processing, allowing code execution when the content is played in a browser or opened via an application that embeds Flash (such as Adobe Reader for PDFs containing Flash). This was actively exploited as a zero-day before Adobe released APSB10-14. CISA added to KEV in June 2022; the requiredAction field reflects that Flash Player is end-of-life and must be removed.

Affected Versions

Note: Adobe Flash Player reached end-of-life in December 2020 and must be fully removed from all systems.

Technical Details

The vulnerability (CWE-787: Out-of-Bounds Write) exists in Adobe Flash Player's SWF content processing engine. Flash's rendering and ActionScript engine processes complex SWF binary format data including animations, shapes, fonts, video, and ActionScript bytecode. In the vulnerable code path, processing a specially crafted SWF file triggers a write operation beyond the bounds of an allocated buffer.

The dual exploitation path (browser and PDF) was a distinctive characteristic of this vulnerability:

1. Via browser Flash plugin: A web page embeds malicious SWF content. The browser's Flash plugin processes it, triggering the out-of-bounds write.
2. Via PDF with embedded Flash: Malicious PDFs containing embedded SWF objects would trigger the same vulnerability through Acrobat/Reader's embedded Flash runtime.

The zero-day timing (exploited before the patch) indicates sophisticated threat actors had access to the exploit before public disclosure. Adobe's emergency out-of-band patch release reflected the severity and confirmed in-the-wild exploitation.

Discovery

Discovered and exploited in targeted attacks before Adobe issued any patch. Adobe became aware of active exploitation around June 4, 2010, and released the emergency APSB10-14 patch four days later — one of the faster turnaround times for an Adobe Flash emergency response. The rapid patch reflected both the severity of confirmed exploitation and Adobe's improved emergency response following the 2009 Reader zero-day experiences.

Exploitation Context

Flash zero-days in 2010 were premier attack tools:

• Zero-day in targeted espionage: The initial exploitation before the June 4 disclosure suggests use by sophisticated actors in targeted intrusions against high-value targets — government, defense, financial sector.
• Drive-by downloads: After public disclosure, Flash exploits were rapidly incorporated into criminal exploit kits. Any website visit from a browser with an unpatched Flash plugin could result in silent malware installation.
• PDF delivery: The ability to deliver the Flash exploit via PDF email attachments (rather than requiring the victim to visit a specific web page) expanded the delivery options for targeted spear phishing campaigns.
• Persistent Flash lag: Enterprise Flash deployment lagged behind security updates. Many organizations locked Flash versions for application compatibility, maintaining vulnerable installations long after patches were available.

Remediation

1. Remove Adobe Flash Player immediately: Flash is end-of-life (December 2020) with no security support. Uninstall it completely from all systems. Microsoft has pushed Windows Updates that automatically remove Flash.
2. Apply APSB10-14: If still running Flash for legacy reasons, upgrade to version 10.1.53.64 at minimum — though complete removal is required.
3. Replace Flash-dependent applications: Identify any business-critical applications still using Flash (internal portals, legacy line-of-business apps) and plan immediate migration to modern web technologies (HTML5, JavaScript).
4. Block SWF at the perimeter: Configure web proxies and email gateways to block SWF content.
5. Browser policy enforcement: Configure browsers via Group Policy or MDM to block Flash content.