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Ubuntu Security Notice USN-3991-2

Ubuntu Security Notice USN-3991-2
Posted Jun 6, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3991-2 - USN-3991-1 fixed vulnerabilities in Firefox. The update caused a regression which resulted in issues when upgrading between Ubuntu releases. This update fixes the problem. Multiple security issues were discovered in Firefox.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-11695, CVE-2019-11697, CVE-2019-11698, CVE-2019-7317, CVE-2019-9816, CVE-2019-9820
MD5 | dfe92b399280a2bd7624c1594870919f

Ubuntu Security Notice USN-3991-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3991-2
June 06, 2019

firefox regression
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

USN-3991-1 caused a regression in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-3991-1 fixed vulnerabilities in Firefox. The update caused a
regression which resulted in issues when upgrading between Ubuntu
releases. This update fixes the problem.

We apologize for the inconvenience.

Original advisory 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, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693,
CVE-2019-11695, CVE-2019-11696, CVE-2019-11699, CVE-2019-11701,
CVE-2019-7317, CVE-2019-9800, CVE-2019-9814, CVE-2019-9817, CVE-2019-9819,
CVE-2019-9820, CVE-2019-9821)

It was discovered that pressing certain key combinations could bypass
addon installation prompt delays. If a user opened a specially crafted
website, an attacker could potentially exploit this to trick them in to
installing a malicious extension. (CVE-2019-11697)

It was discovered that history data could be exposed via drag and drop
of hyperlinks to and from bookmarks. If a user were tricked in to dragging
a specially crafted hyperlink to the bookmark toolbar or sidebar, and
subsequently back in to the web content area, an attacker could
potentially exploit this to obtain sensitive information. (CVE-2019-11698)

A type confusion bug was discovered with object groups and UnboxedObjects.
If a user were tricked in to opening a specially crafted website after
enabling the UnboxedObjects feature, an attacker could potentially
exploit this to bypass security checks. (CVE-2019-9816)

Update instructions:

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

Ubuntu 19.04:
firefox 67.0.1+build1-0ubuntu0.19.04.1

Ubuntu 18.10:
firefox 67.0.1+build1-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
firefox 67.0.1+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
firefox 67.0.1+build1-0ubuntu0.16.04.1

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

References:
https://usn.ubuntu.com/3991-2
https://usn.ubuntu.com/3991-1
https://launchpad.net/bugs/1830096

Package Information:

https://launchpad.net/ubuntu/+source/firefox/67.0.1+build1-0ubuntu0.19.04.1

https://launchpad.net/ubuntu/+source/firefox/67.0.1+build1-0ubuntu0.18.10.1

https://launchpad.net/ubuntu/+source/firefox/67.0.1+build1-0ubuntu0.18.04.1

https://launchpad.net/ubuntu/+source/firefox/67.0.1+build1-0ubuntu0.16.04.1

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