Thunderbird 52.6.0 with security fixes released

Martin Brinkmann
Jan 26, 2018
Email, Thunderbird
|
20

Thunderbird 52.6.0 is a security update for the popular desktop email client. The release is available via the email client's automatic update feature and also on the official project website.

Thunderbird users can run a manual check for updates with a click on Help > About Thunderbird. If the menu bar is missing, tap on the Alt-key to display it.

Thunderbird will pick up the new update and download and install it automatically.

Thunderbird 52.6.0

thunderbird 52.6.0

Thunderbird 52.6.0 is a security and maintenance release.

The team lists all fixed security vulnerabilities on this page. The bulk of issues cannot be exploited through emails because scripts are disabled by default when reading emails. They may be exploited however in browser or browser-like contexts.

  • CVE-2018-5095: Integer overflow in Skia library during edge builder allocation
  • CVE-2018-5096: Use-after-free while editing form elements
  • CVE-2018-5097: Use-after-free when source document is manipulated during XSLT
  • CVE-2018-5098: Use-after-free while manipulating form input elements
  • CVE-2018-5099: Use-after-free with widget listener
  • CVE-2018-5102: Use-after-free in HTML media elements
  • CVE-2018-5103: Use-after-free during mouse event handling
  • CVE-2018-5104: Use-after-free during font face manipulation
  • CVE-2018-5117: URL spoofing with right-to-left text aligned left-to-right
  • CVE-2018-5089: Memory safety bugs fixed in Firefox 58, Firefox ESR 52.6, and Thunderbird 52.6

Thunderbird 52.6.0 fixes three usability issues as well.

  • Searching message bodies of messages in local folders, including filter and quick filter operations, not working reliably: Content not found in base64-encode message parts, non-ASCII text not found and false positives found.
  • Defective messages (without at least one expected header) not shown in IMAP folders but shown on mobile devices
  • Calendar: Unintended task deletion if numlock is enabled

The search issue fix is probably the biggest improvement in the release. Thunderbird's built-in search did not work reliably in some cases. If you noticed in the past that mails were not returned by the search even though they should, this may have been the reason for that.

Thunderbird did not display defective messages in IMAP folders under certain circumstances. This is fixed as well and should work as intended.

Last but not least, a bug caused tasks to be deleted in the built-in calendar if Numlock was activated.

Closing Words

Thunderbird 52.6.0 is a security update and as such should be installed asap. I did not notice any issues yet after the upgrade but that is just with a couple of minutes of using the new version. If anything comes up I'll update the article.

Now You: Which email client or service do you use?

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Thunderbird 52.6.0 with security fixes released
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Thunderbird 52.6.0 with security fixes released
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Thunderbird 52.6.0 is a security update for the popular desktop email client. The release is available via the email client's automatic update feature and also on the official project website.
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Comments

  1. JMGG said on January 19, 2012 at 8:25 am
    Reply

    You said that Outlook isn’t your main email client, so which is your main one?

    1. BalaC said on January 19, 2012 at 9:42 am
      Reply

      I think its thunderbird

    2. Martin Brinkmann said on January 19, 2012 at 10:15 am
      Reply

      It is Mozilla Thunderbird.

  2. Salaam said on September 24, 2012 at 9:52 pm
    Reply

    Awesome! This actually solved my problem… what a stupid bug.

  3. Claud said on December 19, 2012 at 2:08 am
    Reply

    If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.

    1. Lynda said on February 12, 2013 at 3:37 pm
      Reply

      THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!

    2. Chad said on November 20, 2018 at 4:24 pm
      Reply

      Solved my issue! 6 years later and this is still problem…

    3. Ivan X said on January 21, 2021 at 4:50 pm
      Reply

      Fantastic. Thank you. Size did the trick.

  4. Andrew said on October 26, 2013 at 7:06 am
    Reply

    This solved my Outlook problem, too. Thank you. :)

  5. Charles said on December 7, 2013 at 7:23 pm
    Reply

    Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.

  6. garth said on November 7, 2014 at 7:13 pm
    Reply

    You are a god – thank you!

  7. Faisal said on February 9, 2015 at 10:09 am
    Reply

    thanks a lot…. work like charm.. :-)

  8. Simon said on March 24, 2015 at 11:36 pm
    Reply

    Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers

  9. Olu said on April 14, 2015 at 1:35 pm
    Reply

    Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
    Thank you

  10. Coenig said on July 23, 2015 at 7:36 am
    Reply

    Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)

  11. Fali said on January 20, 2016 at 4:19 pm
    Reply

    Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.

    1. MIki said on January 10, 2019 at 11:54 am
      Reply

      I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!

  12. Christina said on January 20, 2016 at 6:14 pm
    Reply

    Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007

  13. Oz said on July 22, 2016 at 3:20 pm
    Reply

    Great tip! Thanks!

  14. Tracy said on September 1, 2016 at 4:48 pm
    Reply

    Worked for me, too – thank you!!!

  15. shawn said on September 9, 2016 at 10:25 am
    Reply

    It’s Worked for me, too
    thank you very much!

  16. Jari said on October 31, 2016 at 11:53 am
    Reply

    I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!

  17. Michel H said on November 30, 2016 at 11:08 pm
    Reply

    Thank you so much. Solved!
    Considering you published this in 2012, incredible not been debugged by Microsoft.
    Thank you again. M

  18. Ziad Bitar said on January 9, 2017 at 2:00 am
    Reply

    This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.

    Thanks.

  19. Anonymous said on February 15, 2017 at 5:24 pm
    Reply

    Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.

  20. Rochelle said on March 6, 2017 at 11:59 am
    Reply

    Thank you, this worked !!!!

  21. anom1234 said on May 20, 2018 at 11:20 pm
    Reply

    Man, you are a fucking god. Thanks a lot, what an annoying bug!!

  22. JC said on October 12, 2020 at 2:14 pm
    Reply

    Awesome, this post solved the issue. Many thanks!

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