0-day Flash Exploit From Hacking Team Data Leak (July 7, 2015)


HackingTeam has discovered a 0-day exploit in the wild in Flash Player. This exploit works against the most recent version of Flash Player( The exploit triggers a use-after-free vulnerability that affects the flash player.

The vulnerability occurs when an element of ByteArray of certain size is initialized with an object. This assignment happens first by saving the offset address of the array in a local variable. Then to calculate the value of the object, ‘valueOf()’ function is triggered against the object. This function is overriden where the code changes the length of the ByteArray and the array is relocated. This advertently invalidates the offset address thus triggering use-after-free vulnerability. With the vulnerability, it’s very easy to predict and control the address and thus making it very easy to exploit.

We are closely monitoring if there are any other exploits in-the-wild.

Sonicwall has written following signatures that protect our customers from this exploit:

  • SPY 1069 : Malformed-File swf.OT.29
  • SPY 1366 : Malformed-File swf.MT.16

This vulnerability is referred by CVE as CVE-2015-5119.

Security News
The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.