Operating System:

[Ubuntu]

Published:

10 September 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3044
                    USN-5074-1: Firefox vulnerabilities
                             10 September 2021

===========================================================================

        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
                   Reduced Security                -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-38494 CVE-2021-38493 CVE-2021-38491

Reference:         ESB-2021.3000
                   ESB-2021.2999

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-5074-1

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-5074-1: Firefox vulnerabilities
09 September 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 20.04 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, bypass mixed
content blocking, or execute arbitrary code.

Update instructions

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

Ubuntu 21.04

  o firefox - 92.0+build3-0ubuntu0.21.04.1

Ubuntu 20.04

  o firefox - 92.0+build3-0ubuntu0.20.04.1

Ubuntu 18.04

  o firefox - 92.0+build3-0ubuntu0.18.04.1

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

References

  o CVE-2021-38493
  o CVE-2021-38494
  o CVE-2021-38491

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
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===========================================================================
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