Use-after-free when parsing CSS in Internet Explorer

Published: 2010-11-03 18:14:07 | Updated: 2017-01-31 06:04:55
Severity Critical
Patch available YES
Number of vulnerabilities 1
CVSSv2 7.7 (AV:N/AC:M/Au:N/C:C/I:C/A:C/E:F/RL:OF/RC:C)
CVSSv3 8.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE ID CVE-2010-3962
CWE ID CWE-416
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Microsoft Internet Explorer
Vulnerable software versions Microsoft Internet Explorer 6
Microsoft Internet Explorer 7
Microsoft Internet Explorer 8
Vendor URL Microsoft
Advisory type Public

Security Advisory

1) Use-after-free

Description

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

The vulnerability exists due to use-after-free error when processing CSS token sequences and the clip attribute. A remote attacker can create a specially crafted HTML page, trick the victim into visiting it, cause memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

Remediation

Install updates from vendor's website.

External links

https://technet.microsoft.com/library/security/2458511
https://technet.microsoft.com/library/security/ms10-090
https://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacks
http://security.bkav.com/home/-/blogs/new-ie-zero-day-vulnerability-cve-2010-3962-/normal

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