BROWSER-IE -- Snort has detected traffic known to exploit vulnerabilities present in the Internet Explorer browser, or products that have the Trident or Tasman engines.
BROWSER-IE Microsoft Edge JIT floating point value type confusion attempt
This event is generated when an html file containing malicious values traverses the corporate network.
Attempted Administrator Privilege Gain
A type confusion vulnerability has been identified in Windows Edge, that could
allow an attacker to execute arbitrary code on the targeted host.
The bug specifically occurs in the way the JIT(Just-In-Time) engine for Edge browser handles float values. In certain specific conditions , the dynamically generated JIT code fails to keep track of the type of an object when handling type conversions resulting from assigning float values to this object. This is a type confusion in chakra engine due to insufficient check when setting a float value to var array.
Ease of Attack:
What To Look For
No public information
No known false positives
Cisco Talos Intelligence Group
MITRE ATT&CK Framework
For reference, see the MITRE ATT&CK vulnerability types here:
CVE Additional Information
CVE-2018-8555A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8541, CVE-2018-8542, CVE-2018-8543, CVE-2018-8551, CVE-2018-8556, CVE-2018-8557, CVE-2018-8588.
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