Advisory Details

November 20th, 2017

Microsoft Chakra Regular Expression Integer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2017-11858
CVSS SCORE	5.1, AV:N/AC:H/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Chakra
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['29832']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Chakra. 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 regular expressions. A crafted regular expression can trigger an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute 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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11858
DISCLOSURE TIMELINE	2017-09-05 - Vulnerability reported to vendor 2017-11-20 - Coordinated public release of advisory
CREDIT	Huang Anwen of ichunqiu Ker Team(https://www.ichunqiu.com/ )

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