Zero-day vulnerability in Microsoft Internet Explorer

тАЬUse-after-freeтАЭ error
CVE-2014-0307

The flaw was most likely introduced in August 2013. The vulnerability was reported to vendor - 2014-02-04.
Private fully functional exploit code existed long before the vendor released security patch. We consider this vulnerability a zero-day.

Known malware:

JS/Exploit.CVE-2014-0307.

Vulnerability details

Advisory: SB20140311 - Remote code execution in Microsoft Internet Explorer

Vulnerable component: Microsoft Internet Explorer

CVE-ID: CVE-2014-0307

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

CWE-ID: CWE-119 - Memory corruption

Description:

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

The weakness exists due to use-after-free when accessing an object in memory. 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 on the vulnerable system.

Note: the vulnerability was being actively exploited.

Public Exploits:

- Microsoft Internet Explorer - TextRange Use-After-Free (MS14-012) (Metasploit) [Exploit-DB]

External links:

https://technet.microsoft.com/library/security/ms14-012
https://www.symantec.com/security_response/vulnerability.jsp?bid=66032
http://ec2-75-101-158-109.compute-1.amazonaws.com/news/stories/33351-microsoft-internet-explorer-mem...
http://www.csoonline.com/article/2888040/cyber-attacks-espionage/the-top-software-exploit-of-2014-th...
http://www.techcentral.ie/top-exploit-2014-stuxnet-2010/
https://github.com/CCrashBandicot/helpful/blob/master/CVE-2014-0307.rb

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.