Zero-day vulnerability in Adobe Flash Player

Use-after-free error
CVE-2015-0313

The vulnerability was used during malwertising campaign against visitors of dailymotion.com.

Known malware:

SWF_EXPLOIT.MJST
Hanjuan Exploit Kit

Vulnerability details

Advisory: SB2015020201 - Multiple vulnerabilities in Adobe Flash Player

Vulnerable component: Adobe Flash Player

CVE-ID: CVE-2015-0313

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-416 - Use After Free

Description:

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

The weakness exists due to use-after-free error when processing .swf content. 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 results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Known APT campaigns:

dailymotion.com breach

The campaign seems to use Angler Exploit kit.

Trend Micro dubbed the exploit тАЬSWF_EXPLOIT.MJSTтАЭ.

Public Exploits:

- Adobe Flash Player - ByteArray With Workers Use-After-Free (Metasploit) [Exploit-DB]

- Adobe Flash Player - Arbitrary Code Execution [Exploit-DB]

- Adobe Flash Player - Arbitrary Code Execution [Exploit-DB]

External links:

https://helpx.adobe.com/security/products/flash-player/apsa15-02.html
https://helpx.adobe.com/security/products/flash-player/apsb15-04.html
http://blog.trendmicro.com/trendlabs-security-intelligence/trend-micro-discovers-new-adobe-flash-zer...
http://www.securityweek.com/adobe-prepares-patch-another-critical-flash-player-vulnerability
https://krebsonsecurity.com/2015/02/yet-another-flash-patch-fixes-zero-day-flaw/#more-29724
http://www.greatsoftline.com/another-critical-zero-day-vulnerability-in-adobe-flash-player/
https://nakedsecurity.sophos.com/2015/02/03/news-flash-3rd-time-newunlucky-0-day-hits-adobes-browser...
https://www.recordedfuture.com/top-vulnerabilities-2015/
http://www.networkworld.com/article/3003176/security/8-of-top-10-vulnerabilities-used-by-exploit-kit...
http://www.itnews.com.au/news/hackers-target-third-new-zero-day-for-adobe-flash-399960
http://researchcenter.paloaltonetworks.com/2015/02/palo-alto-networks-traps-protects-enterprises-zer...
http://www.fin24.com/Tech/News/Hackers-target-Adobe-Flash-again-20150205
https://arstechnica.com/security/2015/02/as-flash-0day-exploits-reach-new-level-of-meanness-what-are...
http://www.techtimes.com/articles/30925/20150206/adobe-releases-patch-for-dangerous-flash-player-zer...
http://www.darkreading.com/new-adobe-flash-0-day-used-in-malvertising-campaign/d/d-id/1318900
https://philipcao.com/2015/02/04/palo-alto-networks-traps-protects-enterprises-from-zero-day-cve-201...
https://betanews.com/2015/02/02/surprise-adobe-flash-has-a-security-flaw-on-windows-mac-and-linux/

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.