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Sid 1-46207

Message

BROWSER-IE Microsoft Windows Edge use-after-free attempt

Summary

This event is generated when a use after free attempt against Internet Explorer is observed.

Impact

Potential code execution

CVE-2018-0991:

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-2018-0991: A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka "Internet Explorer Memory Corruption Vulnerability." This affects Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-0870, CVE-2018-0997, CVE-2018-1018, CVE-2018-1020.

Affected systems

  • microsoft internet_explorer 10
  • microsoft internet_explorer 11

Ease of attack

CVE-2018-0991:

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-2018-0991