Operating System:

[Ubuntu]

Published:

21 January 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0242
                  USN-4701-1: Thunderbird vulnerabilities
                              21 January 2021

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

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

Product:           Thunderbird
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- 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-2020-35113 CVE-2020-35111 CVE-2020-26978
                   CVE-2020-26974 CVE-2020-26973 CVE-2020-26971
                   CVE-2020-26970 CVE-2020-16044 CVE-2020-16042

Reference:         ESB-2021.0100
                   ESB-2021.0011
                   ESB-2020.4524
                   ESB-2020.4515
                   ESB-2020.4458

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4701-1

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USN-4701-1: Thunderbird vulnerabilities
20 January 2021

Several security issues were fixed in Thunderbird.
Releases

  o Ubuntu 20.10

Packages

  o thunderbird - Mozilla Open Source mail and newsgroup client

Details

Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass the CSS sanitizer, or execute
arbitrary code. ( CVE-2020-16042 , CVE-2020-16044 , CVE-2020-26971 ,
CVE-2020-26973 , CVE-2020-26974 , CVE-2020-26978 , CVE-2020-35113 )

It was discovered that the proxy.onRequest API did not catch
view-source URLs. If a user were tricked in to installing an
extension with the proxy permission and opening View Source, an
attacker could potentially exploit this to obtain sensitive
information. ( CVE-2020-35111 )

A stack overflow was discovered due to incorrect parsing of SMTP server
response codes. An attacker could potentially exploit this to execute
arbitrary code. ( CVE-2020-26970 )

Update instructions

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

Ubuntu 20.10

  o thunderbird - 1:78.6.1+build1-0ubuntu0.20.10.1

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

References

  o CVE-2020-16042
  o CVE-2020-26974
  o CVE-2020-26973
  o CVE-2020-35113
  o CVE-2020-26970
  o CVE-2020-16044
  o CVE-2020-26971
  o CVE-2020-35111
  o CVE-2020-26978

Related notices

  o USN-4687-1 : firefox
  o USN-4671-1 : firefox

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

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