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Sid 1-46545

Message

BROWSER-IE Microsoft Edge scripting engine use after free attempt

Summary

This event is generated when an attacker attempts to exploit a use after free vulnerability present in the Microsoft Edge javascript engine.

Impact

Attempted User Privilege Gain

CVE-2018-0946:

CVSS base score 7.5

CVSS impact score 5.9

CVSS exploitability score 1.6

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Detailed information

Rule checks for an attempt to exploit a use after free vulnerability present in the Microsoft Edge Chrakra engine. CVE-2018-0946: A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge, aka "Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-0945, CVE-2018-0951, CVE-2018-0953, CVE-2018-0954, CVE-2018-0955, CVE-2018-1022, CVE-2018-8114, CVE-2018-8122, CVE-2018-8128, CVE-2018-8137, CVE-2018-8139.

Affected systems

  • microsoft chakracore 1.8.3
  • microsoft edge -

Ease of attack

CVE-2018-0946:

Access Vector

Access Complexity

Authentication

False positives

False negatives

Corrective action

Contributors

  • Cisco's Talos Intelligence Group

Additional References

  • portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-0946