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Sid 1-47092

Message

BROWSER-IE Microsoft Internet Explorer crafted UNC path sandbox escape attempt

Summary

This event is generated when an attacker attempts to exploit an Internet Explorer sandbox escape vulnerability.

Impact

Attempted User Privilege Gain

CVE-2018-0949:

CVSS base score 6.5

CVSS impact score 3.6

CVSS exploitability score 2.8

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Detailed information

Rule checks for attempts to exploit an Internet Explorer sandbox escape vulnerability. CVE-2018-0949: A security feature bypass vulnerability exists when Microsoft Internet Explorer improperly handles requests involving UNC resources, aka "Internet Explorer Security Feature Bypass Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.

Affected systems

  • microsoft internet_explorer 9
  • microsoft internet_explorer 10
  • microsoft internet_explorer 11

Ease of attack

CVE-2018-0949:

Access Vector

Access Complexity

Authentication

False positives

False negatives

Corrective action

Implement the patches described here: url,portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-0949.

Contributors

  • Cisco's Talos Intelligence Group

Additional References

  • portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-0949