Zero-day vulnerability in Adobe Flash Player

Type confusion
CVE-2016-1019

The weakness was presented by Kafeine (EmergingThreats/Proofpoint), Genwei Jiang (FireEye, Inc.) and Clement Lecigne (Google).

According to FireEye, on April 2, Kafeine provided details on a version of the Magnitude Exploit Kit that was originally believed to be exploiting known Adobe Flash vulnerabilities.

Known malware:

Magnitude, Neutrino and Nuclear Pack Exploit Kit.
Cerber and DMA Locker ransomware.

Vulnerability details

Advisory: SB2016041201 - Microsoft Security Update for Adobe Flash Player

Vulnerable component: Adobe Flash Player

CVE-ID: CVE-2016-1019

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-843 - Type confusion

Description:

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to type confusion error when handling .swf files. A remote attacker can create a specially crafted Web site, trick the victim into visiting it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution.

Note: the vulnerability was being actively exploited.

External links:

https://helpx.adobe.com/security/products/flash-player/apsa16-01.html
https://www.fireeye.com/blog/threat-research/2016/04/cve-2016-1019_a_new.html
http://blog.trendmicro.com/trendlabs-security-intelligence/look-adobe-flash-player-cve-2016-1019-zer...
https://www.proofpoint.com/us/threat-insight/post/killing-zero-day-in-the-egg
http://securityaffairs.co/wordpress/46107/malware/adobe-fixes-cve-2016-1019.html
https://www.bleepingcomputer.com/news/security/adobe-releases-security-advisory-on-critical-vulnerab...
http://www.zdnet.com/article/cyberattackers-botch-integration-of-adobe-flash-zero-day-vulnerability-...
http://www.eweek.com/security/adobe-patches-zero-day-flaw-used-by-exploit-kit.html
https://www.grahamcluley.com/adobe-flash-responsible-six-top-10-bugs-used-exploit-kits-2016/
http://hub-apac.insight.com/h/i/236881036-zero-day-attack-discovered-in-magnitude-exploit-kit-target...
https://trushieldinc.com/adobe-flash-player-zero-day-exploit/
https://blog.malwarebytes.com/threat-analysis/exploits-threat-analysis/2016/04/botched-flash-0day-ge...
http://www.symantec.com/connect/blogs/new-flash-zero-day-exploited-attackers-wild
http://blog.trendmicro.com/trendlabs-security-intelligence/cve-2016-1019-zero-day-integrated-in-expl...
https://threatpost.com/emergency-update-coming-for-flash-vulnerability-under-attack/117219/
http://www.ecommercetimes.com/story/83348.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.