Denial of service in GNOME Epiphany

Published: 2018-07-04

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-11396 CVE-2018-12016
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	GNOME Web (Epiphany) Client/Desktop applications / Web browsers
Vendor	Gnome Development Team

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU13557

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 - Improper input validation

Exploit availability: Yes

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

CPE2.3

cpe:2.3:a:gnome:epiphany:3.28.2.1:*:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

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.

2) Improper input validation

EUVDB-ID: #VU13558