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Ubuntu Security Notice USN-3477-2

Ubuntu Security Notice USN-3477-2
Posted Nov 27, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3477-2 - USN-3477-1 fixed vulnerabilities in Firefox. The update caused search suggestions to not be displayed when performing Google searches from the search bar. This update fixes the problem. 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, read uninitialized memory, obtain sensitive information, bypass same-origin restrictions, bypass CSP protections, bypass mixed content blocking, spoof the addressbar, or execute arbitrary code. It was discovered that javascript: URLs pasted in to the addressbar would be executed instead of being blocked in some circumstances. If a user were tricked in to copying a specially crafted URL in to the addressbar, an attacker could potentially exploit this to conduct cross-site scripting attacks. It was discovered that exported bookmarks do not strip script elements from user-supplied tags. If a user were tricked in to adding specially crafted tags to bookmarks, exporting them and then opening the resulting HTML file, an attacker could potentially exploit this to conduct cross-site scripting attacks. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof, javascript, vulnerability, xss
systems | linux, ubuntu
advisories | CVE-2017-7828, CVE-2017-7830, CVE-2017-7831, CVE-2017-7832, CVE-2017-7833, CVE-2017-7834, CVE-2017-7835, CVE-2017-7837, CVE-2017-7838, CVE-2017-7839, CVE-2017-7840, CVE-2017-7842
SHA-256 | 9d86fd5032018e790c3b211d4a6351a163087b4a1457ea87bb4f30d6d755a7b4

Ubuntu Security Notice USN-3477-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3477-2
November 27, 2017

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

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

- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-3477-1 caused a regression in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-3477-1 fixed vulnerabilities in Firefox. The update caused search
suggestions to not be displayed when performing Google searches from the
search bar. 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, read uninitialized
memory, obtain sensitive information, bypass same-origin restrictions,
bypass CSP protections, bypass mixed content blocking, spoof the
addressbar, or execute arbitrary code. (CVE-2017-7826, CVE-2017-7827,
CVE-2017-7828, CVE-2017-7830, CVE-2017-7831, CVE-2017-7832, CVE-2017-7833,
CVE-2017-7834, CVE-2017-7835, CVE-2017-7837, CVE-2017-7838, CVE-2017-7842)

It was discovered that javascript: URLs pasted in to the addressbar
would be executed instead of being blocked in some circumstances. If a
user were tricked in to copying a specially crafted URL in to the
addressbar, an attacker could potentially exploit this to conduct
cross-site scripting (XSS) attacks. (CVE-2017-7839)

It was discovered that exported bookmarks do not strip script elements
from user-supplied tags. If a user were tricked in to adding specially
crafted tags to bookmarks, exporting them and then opening the resulting
HTML file, an attacker could potentially exploit this to conduct
cross-site scripting (XSS) attacks. (CVE-2017-7840)

Update instructions:

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

Ubuntu 17.10:
firefox 57.0+build4-0ubuntu0.17.10.6

Ubuntu 17.04:
firefox 57.0+build4-0ubuntu0.17.04.6

Ubuntu 16.04 LTS:
firefox 57.0+build4-0ubuntu0.16.04.6

Ubuntu 14.04 LTS:
firefox 57.0+build4-0ubuntu0.14.04.5

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

References:
https://www.ubuntu.com/usn/usn-3477-2
https://www.ubuntu.com/usn/usn-3477-1
https://launchpad.net/bugs/1733970

Package Information:
https://launchpad.net/ubuntu/+source/firefox/57.0+build4-0ubuntu0.17.10.6
https://launchpad.net/ubuntu/+source/firefox/57.0+build4-0ubuntu0.17.04.6
https://launchpad.net/ubuntu/+source/firefox/57.0+build4-0ubuntu0.16.04.6
https://launchpad.net/ubuntu/+source/firefox/57.0+build4-0ubuntu0.14.04.5


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