The following updates has been released for Ubuntu Linux:

USN-3544-1: Firefox vulnerabilities
USN-3546-1: gcab vulnerability

USN-3544-1: Firefox vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3544-1
January 24, 2018

firefox vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Firefox could be made to crash or run programs as your login if it
opened a malicious website.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service via application
crash, spoof the origin in audio capture prompts, trick the user in to
providing HTTP credentials for another origin, spoof the addressbar
contents, or execute arbitrary code. (CVE-2018-5089, CVE-2018-5090,
CVE-2018-5091, CVE-2018-5092, CVE-2018-5093, CVE-2018-5094, CVE-2018-5095,
CVE-2018-5097, CVE-2018-5098, CVE-2018-5099, CVE-2018-5100, CVE-2018-5101,
CVE-2018-5102, CVE-2018-5103, CVE-2018-5104, CVE-2018-5109, CVE-2018-5114,
CVE-2018-5115, CVE-2018-5117, CVE-2018-5122)

Multiple security issues were discovered in WebExtensions. If a user were
tricked in to installing a specially crafted extension, an attacker could
potentially exploit these to gain additional privileges, bypass
same-origin restrictions, or execute arbitrary code. (CVE-2018-5105,
CVE-2018-5113, CVE-2018-5116)

A security issue was discovered with the developer tools. If a user were
tricked in to opening a specially crafted website with the developer tools
open, an attacker could potentially exploit this to obtain sensitive
information from other origins. (CVE-2018-5106)

A security issue was discovered with printing. An attacker could
potentially exploit this to obtain sensitive information from local files.
(CVE-2018-5107)

It was discovered that manually entered blob URLs could be accessed by
subsequent private browsing tabs. If a user were tricked in to entering
a blob URL, an attacker could potentially exploit this to obtain sensitive
information from a private browsing context. (CVE-2018-5108)

It was discovered that dragging certain specially formatted URLs to the
addressbar could cause the wrong URL to be displayed. If a user were
tricked in to opening a specially crafted website and dragging a URL to
the addressbar, an attacker could potentially exploit this to spoof the
addressbar contents. (CVE-2018-5111)

It was discovered that WebExtension developer tools panels could open
non-relative URLs. If a user were tricked in to installing a specially
crafted extension and running the developer tools, an attacker could
potentially exploit this to gain additional privileges. (CVE-2018-5112)

It was discovered that ActivityStream images can attempt to load local
content through file: URLs. If a user were tricked in to opening a
specially crafted website, an attacker could potentially exploit this in
combination with another vulnerability that allowed sandbox protections to
be bypassed, in order to obtain sensitive information from local files.
(CVE-2018-5118)

It was discovered that the reader view will load cross-origin content in
violation of CORS headers. An attacker could exploit this to bypass CORS
restrictions. (CVE-2018-5119)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.10:
firefox 58.0+build6-0ubuntu0.17.10.1

Ubuntu 16.04 LTS:
firefox 58.0+build6-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:
firefox 58.0+build6-0ubuntu0.14.04.1

After a standard system update you need to restart Firefox to make
all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3544-1
CVE-2018-5089, CVE-2018-5090, CVE-2018-5091, CVE-2018-5092,
CVE-2018-5093, CVE-2018-5094, CVE-2018-5095, CVE-2018-5097,
CVE-2018-5098, CVE-2018-5099, CVE-2018-5100, CVE-2018-5101,
CVE-2018-5102, CVE-2018-5103, CVE-2018-5104, CVE-2018-5105,
CVE-2018-5106, CVE-2018-5107, CVE-2018-5108, CVE-2018-5109,
CVE-2018-5111, CVE-2018-5112, CVE-2018-5113, CVE-2018-5114,
CVE-2018-5115, CVE-2018-5116, CVE-2018-5117, CVE-2018-5118,
CVE-2018-5119, CVE-2018-5122

Package Information:
https://launchpad.net/ubuntu/+source/firefox/58.0+build6-0ubuntu0.17.10.1
https://launchpad.net/ubuntu/+source/firefox/58.0+build6-0ubuntu0.16.04.1
https://launchpad.net/ubuntu/+source/firefox/58.0+build6-0ubuntu0.14.04.1

USN-3546-1: gcab vulnerability

==========================================================================
Ubuntu Security Notice USN-3546-1
January 24, 2018

gcab vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.10
- Ubuntu 16.04 LTS

Summary:

gcab could be made to crash or run programs if it opened a specially
crafted file.

Software Description:
- gcab: Microsoft Cabinet file manipulation tool

Details:

Richard Hughes discovered that gcab incorrectly handled certain malformed
cabinet files. If a user or automated system were tricked into opening a
specially crafted cabinet file, a remote attacker could use this issue to
cause gcab to crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.10:
gcab 0.7-4ubuntu0.1
libgcab-1.0-0 0.7-4ubuntu0.1

Ubuntu 16.04 LTS:
gcab 0.7-1ubuntu0.1
libgcab-1.0-0 0.7-1ubuntu0.1

After a standard system update you need to restart your session to make
all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3546-1
CVE-2018-5345

Package Information:
https://launchpad.net/ubuntu/+source/gcab/0.7-4ubuntu0.1
https://launchpad.net/ubuntu/+source/gcab/0.7-1ubuntu0.1