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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1920
                    USN-4978-1: Firefox vulnerabilities
                                3 June 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Firefox
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Provide Misleading Information  -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
                   Unauthorised Access             -- Remote with User Interaction
                   Reduced Security                -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-29967 CVE-2021-29966 CVE-2021-29961
                   CVE-2021-29960 CVE-2021-29959 

Reference:         ESB-2021.1897
                   ESB-2021.1896

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4978-1

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USN-4978-1: Firefox vulnerabilities
02 June 2021

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

  o Ubuntu 21.04
  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS

Packages

  o firefox - Mozilla Open Source web browser

Details

Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, re-enable
camera devices without an additional permission prompt, spoof the browser
UI, or execute arbitrary code. ( CVE-2021-29959 , CVE-2021-29961 ,
CVE-2021-29966 , CVE-2021-29967 )

It was discovered that filenames printed from private browsing mode were
incorrectly retained in preferences. A local attacker could potentially
exploit this to obtain sensitive information. ( CVE-2021-29960 )

Update instructions

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

Ubuntu 21.04

  o firefox - 89.0+build2-0ubuntu0.21.04.1

Ubuntu 20.10

  o firefox - 89.0+build2-0ubuntu0.20.10.1

Ubuntu 20.04

  o firefox - 89.0+build2-0ubuntu0.20.04.2

Ubuntu 18.04

  o firefox - 89.0+build2-0ubuntu0.18.04.2

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

References

  o CVE-2021-29960
  o CVE-2021-29959
  o CVE-2021-29961
  o CVE-2021-29966
  o CVE-2021-29967

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