Think you have a false positive on this rule?

Sid 1-44824

Message

BROWSER-IE Microsoft Internet Explorer VBScript Join out of bounds memory access attempt

Summary

This event is generated when an attempt to exploit CVE 2017-11869 is detected.

Impact

Remote code execution on the affected systems.

CVE-2017-11869:

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-2017-11869: Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, Windows Server 2016 and Windows Server, version 1709 allows an attacker to gain the same user rights as the current user, due to how Microsoft browsers handle objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11870, CVE-2017-11871, and CVE-2017-11873.

Affected systems

  • microsoft internet_explorer 11

Ease of attack

Difficult.

False positives

None.

False negatives

None known.

Corrective action

Update to the latest version of Internet Explorer.

Contributors

  • Cisco's Talos Intelligence Group

Additional References