Rule Category

BROWSER-WEBKIT -- Snort has detected traffic known to exploit vulnerabilities present in the Webkit browser engine (aside from Chrome) this includes Apple’s Safari, RIM’s mobile browser, Nokia, KDE, Webkit itself, and Palm. Attacks often insert code via exploits, cause webkit renderings in the browser to crash, or otherwise create chaos or exploit for entrance.

Alert Message

BROWSER-WEBKIT Apple Safari WebKit cached page memory corruption attempt

Rule Explanation

This event is generated when an attacker attempts to exploit CVE-2019-8822. Impact: Attempted User Privilege Gain Details: This rule fires on an attempt to exploit a type confusion vulnerability in Apple Safari WebKit. Attackers who abuse this vulnerability may be able to execute remote code on the host that generated this alert. Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic:

Technique:

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

CVE

Additional Links

Rule Vulnerability

CVE Additional Information

CVE-2019-8822
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 13.2 and iPadOS 13.2, tvOS 13.2, Safari 13.0.3, iTunes for Windows 12.10.2, iCloud for Windows 11.0, iCloud for Windows 7.15. Processing maliciously crafted web content may lead to arbitrary code execution.
Details
SeverityMEDIUM Base Score6.8
Impact Score6.4 Exploit Score8.6
Confidentiality ImpactPARTIAL Integrity ImpactPARTIAL
Availability ImpactPARTIAL Access VectorNETWORK
AuthenticationNONE Ease of AccessMEDIUM