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Sid 1-48534

Message

BROWSER-IE Microsoft Internet Explorer Jscript.Encode out-of-bounds read attempt

Summary

This event is generated when an attacker attempts to exploit CVE-2018-8631.

Impact

CVE-2018-8631:

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

CVE-2018-8631: A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka "Internet Explorer Memory Corruption 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-2018-8631:

Access Vector

Access Complexity

Authentication

False positives

None Known

False negatives

None Known

Corrective action

Contributors

  • Cisco's Talos Intelligence Group

Additional References

  • portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-8631