Zero-day vulnerability in Microsoft Internet Explorer

Use-after-free error
CVE-2012-1875

A functional exploit with shellcode appeared on PasteBin on 8.06.12 - four days before the Microsoft patch release.
The vulnerability was reported by adept with nickname Dark Son and researcher Yichong Lin.

Known malware:

Trojan.Naid.

Vulnerability details

Advisory: SB2012061202 - Multiple vulnerabilities in Microsoft Internet Explorer

Vulnerable component: Microsoft Internet Explorer

CVE-ID: CVE-2012-1875

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 a use-after-free error related to same id property when attempting to access objects that have been deleted. A remote attacker can create a specially crafted Web site, trick the victim into viewing 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 - Same ID Property Deleted Object Handling Memory Corruption (MS12-037) (Metasploit) [Exploit-DB]

External links:

https://technet.microsoft.com/en-us/library/security/ms12-037
https://lists.xen.org/archives/html/xen-announce/2012-06/msg00001.html
https://www.symantec.com/connect/blogs/cve-2012-1875-exploited-wild-part-1-trojannaid
https://www.alienvault.com/blogs/labs-research/ongoing-attacks-exploiting-cve-2012-1875
https://threatpost.com/exploit-code-surfaces-cve-2012-1875-internet-explorer-bug-061812/76702/
http://breakthesecurity.cysecurity.org/2012/06/cve-2012-1875-hacking-windows-using-ms12-037-internet...
http://www.ehackingnews.com/2012/06/cve-2012-1875-exploit-for-remote-code.html
https://vulners.com/metasploit/MSF:EXPLOIT/WINDOWS/BROWSER/MS12_037_SAME_ID
http://eromang.zataz.com/2012/06/13/ms12-037-internet-explorer-same-id-vulnerability-metasploit-demo...
http://www.cio.com/article/2394927/security0/attack-code-published-for-two-actively-exploited-vulner...
http://www.infosecisland.com/blogview/21670-Symantec-Internet-Explorer-Zero-Day-Exploit-in-the-Wild....

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.