Adobe Flash Player Use-After-Free Remote Code Execution
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
Use-after-free vulnerability in the DisplayObject 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 leverages improper handling of the opaqueBackground property, as exploited in the wild in July 2015.
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
As an interim measure, disable or uninstall Adobe Flash Player from all endpoints and servers, particularly on systems handling sensitive data or frequently browsing the internet. Configure web browsers to block Flash content entirely or to use 'click-to-play' functionality for Flash objects to reduce the exposure to malicious content. Enhance network monitoring to detect and block suspicious Flash content downloads or unusual outbound network connections originating from Flash processes.
The permanent resolution requires upgrading Adobe Flash Player to a patched version that addresses this use-after-free vulnerability. Specifically, update to Flash Player 18.0.0.209 (for Windows/OS X), 11.2.202.508 (for Linux), or later versions provided by Adobe. Ensure all integrated Flash components within browsers (e.g., Chrome, Edge) are also updated to their latest secure versions as they are released by their respective vendors.
An attacker can achieve remote arbitrary code execution by enticing a user to open specially crafted Flash content, leading to full compromise of the affected system. This critical vulnerability allows for data theft, installation of persistent malware, or denial of service through memory corruption, severely impacting an organization's confidentiality, integrity, and availability. Given it was exploited in the wild, the risk of immediate compromise is very high.
Other CVEs affecting flash player
OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.
Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.
Adobe Flash Player 21.0.0.226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2016.
Unspecified vulnerability in Oracle Java SE 6u113, 7u99, and 8u77; Java SE Embedded 8u77; and JRockit R28.3.9 allows remote attackers to affect confidentiality, integrity, and availability via vectors related to JMX.
Adobe Flash Player 21.0.0.197 and earlier allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors, as exploited in the wild in April 2016.
Unspecified vulnerability in Oracle Java SE 6u95, 7u80, and 8u45, and Java SE Embedded 7u75 and 8u33 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors related to Libraries, a different vulnerability than CVE-2015-4732.
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.
Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.296 and 14.x through 18.0.0.194 on Windows and OS X and 11.x through 11.2.202.468 on Linux 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.