CVE-2015-5123: Adobe Flash Player Use-After-Free Vulnerability
Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that overrides a valueOf function, as exploited in the wild in July 2015.
Other sources
Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player allows remote attackers to execute code or cause a denial-of-service (DoS).
— CISA
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Disconnect Adobe Flash Player from the network if it is still in use, since the impacted product is end-of-life.
Event History
Frequently Asked Questions
What is the severity of CVE-2015-5123?
CVE-2015-5123 is a critical vulnerability in Adobe Flash Player that could allow an attacker to execute arbitrary code.
How do I fix CVE-2015-5123?
To fix CVE-2015-5123, users should update Adobe Flash Player to the latest version released by Adobe.
Which systems are affected by CVE-2015-5123?
CVE-2015-5123 affects Adobe Flash Player versions between 11.0 and 18.0.0.203 on various operating systems including Windows, OS X, and Linux.
What type of vulnerability is CVE-2015-5123?
CVE-2015-5123 is categorized as a use-after-free vulnerability that can lead to memory corruption.
Is there any immediate mitigation for CVE-2015-5123?
The immediate mitigation for CVE-2015-5123 includes disabling or uninstalling Adobe Flash Player until a patch is applied.