#VU13557 Improper input validation in GNOME Web (Epiphany) - CVE-2018-11396

Vulnerability identifier: #VU13557

Vulnerability risk: Low

CVSSv4.0: 7.7 [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:P/U:Clear]

CVE-ID: CVE-2018-11396

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
GNOME Web (Epiphany)
Client/Desktop applications / Web browsers

Vendor: Gnome Development Team

Description

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

The vulnerability exists in ephy-session.c in libephymain.so in GNOME Web (aka Epiphany) due to insufficient validation of user-supplied input. A remote attacker can supply JavaScript code, trigger access to a NULL URL, as demonstrated by a crafted window.open call and cause the service to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GNOME Web (Epiphany): 3.26.6 - 3.28.2.1

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External links
https://bugzilla.gnome.org/show_bug.cgi?id=795740

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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, proof of concept for this vulnerability is available.