#VU3929 Use-after-free error in Microsoft Internet Explorer
Vulnerability identifier: #VU3929
Vulnerability risk: High
CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-416
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Microsoft Internet Explorer
Client/Desktop applications /
Web browsers
Vendor: Microsoft
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 Layout object. 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.
Mitigation
Install update from vendor's website:
Internet Explorer 9 for Windows Vista Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=daba1ef1-62db-43db-9d5b-495aa2d3550f
Internet Explorer 9 for Windows Vista x64 Edition Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=aae496ef-fca2-4632-9a8f-2108722d2b28
Internet Explorer 9 for Windows Server 2008 for 32-bit Systems Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=0b2965d7-e0b2-4035-a9e4-f6badb389098
Internet Explorer 9 for Windows Server 2008 for x64-based Systems Service Pack 2:
https://www.microsoft.com/downloads/details.aspx?familyid=612a94ef-0950-41e8-9875-a8f0e71eba6f
Internet Explorer 9 for Windows 7 for 32-bit Systems:
https://www.microsoft.com/downloads/details.aspx?familyid=b303f86a-df17-4961-b677-0c38bd6a86d3
Internet Explorer 9 for Windows 7 for 32-bit Systems Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=b303f86a-df17-4961-b677-0c38bd6a86d3
Internet Explorer 9 for Windows 7 for x64-based Systems :
https://www.microsoft.com/downloads/details.aspx?familyid=01045ee2-c7c4-4078-969f-905fd7e8774f
Internet Explorer 9 for Windows 7 for x64-based Systems Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=01045ee2-c7c4-4078-969f-905fd7e8774f
Internet Explorer 9 for Windows Server 2008 R2 for x64-based Systems:
https://www.microsoft.com/downloads/details.aspx?familyid=c44a0253-fefc-4ce6-9cfd-396fdea71f8d
Internet Explorer 9 for Windows Server 2008 R2 for x64-based Systems Service Pack 1:
https://www.microsoft.com/downloads/details.aspx?familyid=c44a0253-fefc-4ce6-9cfd-396fdea71f8d
Vulnerable software versions
Microsoft Internet Explorer: 9
External links
http://technet.microsoft.com/en-us/library/security/ms12-063
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
