Ubuntu update for WebKitGTK+

Published: 2018-01-11

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-5753 CVE-2017-5715
CWE-ID	CWE-200
Exploitation vector	Local
Public exploit	Vulnerability #1 is being exploited in the wild. Public exploit code for vulnerability #2 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU9884

Risk: Low

CVSSv4.0: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2017-5753

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: Yes

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists in Intel CPU hardware due to improper implementation of the speculative execution of instructions. A local attacker can perform a bounds check bypass, execute arbitrary code, conduct a side-channel attack and read sensitive memory information.

Mitigation

Update the affected packages

Ubuntu 17.10:

libwebkit2gtk-4.0-37 2.18.5-0ubuntu0.17.10.1

libjavascriptcoregtk-4.0-18 2.18.5-0ubuntu0.17.10.1

Ubuntu 17.04:

libwebkit2gtk-4.0-37 2.18.5-0ubuntu0.17.04.1

libjavascriptcoregtk-4.0-18 2.18.5-0ubuntu0.17.04.1

Ubuntu 16.04 LTS:

libwebkit2gtk-4.0-37 2.18.5-0ubuntu0.16.04.1

libjavascriptcoregtk-4.0-18 2.18.5-0ubuntu0.16.04.1

Vulnerable software versions

Ubuntu: 16.04 - 17.10

CPE2.3

External links

https://www.ubuntu.com/usn/usn-3530-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Information disclosure

EUVDB-ID: #VU9883