Advisory Details

September 8th, 2015

Microsoft Internet Explorer CImgTaskSvgDoc Use-After-Free Remote Code Execution Vulnerability

ZDI-15-427
ZDI-CAN-3025

CVE ID CVE-2015-2501
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 20169. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to cause a use-after-free condition on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the processing of svg images. A specially crafted svg image can cause Internet Explorer to reuse a CImgTaskSvgDoc object in memory after it has been freed. An attacker may be able to leverage this vulnerability to execute arbitrary code under the context of the current process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/library/security/ms15-094
DISCLOSURE TIMELINE
  • 2015-07-02 - Vulnerability reported to vendor
  • 2015-09-08 - Coordinated public release of advisory
CREDIT Sean Verity
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