#VU14308 Improper input validation in WebKitGTK+ - CVE-2018-11646

Vulnerability identifier: #VU14308

Vulnerability risk: Low

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2018-11646

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
WebKitGTK+
Server applications / Frameworks for developing and running applications

Vendor: WebKitGTK

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to mishandling of an unset pageURL in webkitFaviconDatabaseSetIconForPageURL and webkitFaviconDatabaseSetIconURLForPageURL in UIProcess/API/glib/WebKitFaviconDatabase.cpp. A remote attacker can send specially crafted input and cause the service to crash.

Mitigation
Update to version 2.21.4 or later.

Vulnerable software versions

WebKitGTK+: 2.15.3 - 2.21.3

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External links
https://bugs.webkit.org/show_bug.cgi?id=186164

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.