CVE-2015-5123: Adobe Flash Player Use-After-Free Vulnerability

Vulnerability summary

CVE-2015-5123 is a high (CVSS 10.0) Use After Free vulnerability in Adobe Flash Player. It is known to be exploited: CISA lists it, first on 13-04-2022. EPSS estimates a 18.83% chance of exploitation in the next 30 days, higher than 97.2% of scored vulnerabilities.

Timeline

1. 14-07-2015
   PublishedVulnerability first disclosed.
2. 13-04-2022
   Added to CISA KEVAdobe Flash Player Use-After-Free Vulnerability
3. 04-05-2022
   CISA remediation dueThe impacted product is end-of-life and should be disconnected if still in use.
4. 17-11-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.