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             AUSCERT External Security Bulletin Redistribution

                    USN-4122-2: Firefox vulnerabilities
                              10 October 2019


        AusCERT Security Bulletin Summary

Product:           Firefox
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Increased Privileges            -- Existing Account            
                   Access Privileged Data          -- Remote with User Interaction
                   Modify Arbitrary Files          -- Existing Account            
                   Cross-site Scripting            -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Access Confidential Data        -- Remote/Unauthenticated      
                   Reduced Security                -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11752 CVE-2019-11750 CVE-2019-11749
                   CVE-2019-11748 CVE-2019-11747 CVE-2019-11746
                   CVE-2019-11744 CVE-2019-11743 CVE-2019-11742
                   CVE-2019-11741 CVE-2019-11740 CVE-2019-11738
                   CVE-2019-11737 CVE-2019-11735 CVE-2019-11734
                   CVE-2019-9812 CVE-2019-5849 

Reference:         ASB-2019.0252

Original Bulletin: 

Revision History:  October   10 2019: Updated to USN 4122-2
                   September  5 2019: Initial Release

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USN-4122-2: Firefox regression
8 October 2019

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

  o Ubuntu 19.04
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS


USN-4122-1 caused a regression in Firefox.

Software Description

  o firefox - Mozilla Open Source web browser


USN-4122-1 fixed vulnerabilities in Firefox. The update caused a regression
that resulted in a crash when changing YouTube playback speed in some
circumstances. 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 obtain sensitive information, bypass Content Security Policy (CSP)
protections, bypass same-origin restrictions, conduct cross-site scripting
(XSS) attacks, cause a denial of service, or execute arbitrary code.
(CVE-2019-5849, CVE-2019-11734, CVE-2019-11735, CVE-2019-11737, CVE-2019-11738,
CVE-2019-11740, CVE-2019-11742, CVE-2019-11743, CVE-2019-11744, CVE-2019-11746,
CVE-2019-11748, CVE-2019-11749, CVE-2019-11750, CVE-2019-11752)

It was discovered that a compromised content process could log in to a
malicious Firefox Sync account. An attacker could potentially exploit this, in
combination with another vulnerability, to disable the sandbox. (CVE-2019-9812)

It was discovered that addons.mozilla.org and accounts.firefox.com could be
loaded in to the same content process. An attacker could potentially exploit
this, in combination with another vulnerability that allowed a cross-site
scripting (XSS) attack, to modify browser settings. (CVE-2019-11741)

It was discovered that the "Forget about this site" feature in the history pane
removes HTTP Strict Transport Security (HSTS) settings for sites on the
pre-load list. An attacker could potentially exploit this to bypass the
protections offered by HSTS. (CVE-2019-11747)

Update instructions

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

Ubuntu 19.04
    firefox - 69.0.2+build1-0ubuntu0.19.04.1
Ubuntu 18.04 LTS
    firefox - 69.0.2+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
    firefox - 69.0.2+build1-0ubuntu0.16.04.1

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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


  o USN-4122-1
  o LP: 1847354

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