USN-3530-1: WebKitGTK+ vulnerabilities
Ubuntu Security Notice USN-3530-1
11th January, 2018
webkit2gtk vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
Summary
WebKitGTK+ could be made to expose sensitive information.
Software description
- webkit2gtk
– Web content engine library for GTK+
Details
It was discovered that speculative execution performed by modern CPUs
could leak information through a timing side-channel attack, and that
this could be exploited in web browser JavaScript engines. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit this to obtain sensitive information from other
domains, bypassing same-origin restrictions. (CVE-2017-5753, CVE-2017-5715)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- 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
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK+, such as Epiphany, to make all the necessary changes.
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