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AUSCERT External Security Bulletin Redistribution
ESB-2020.2402
USN-4421-1: Thunderbird vulnerabilities
15 July 2020
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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 Privileged Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12421 CVE-2020-12420 CVE-2020-12419
CVE-2020-12418 CVE-2020-12417 CVE-2020-12410
CVE-2020-12406 CVE-2020-12405 CVE-2020-12399
CVE-2020-12398
Reference: ESB-2020.2277
ESB-2020.2250
ESB-2020.2175
ESB-2020.2157
Original Bulletin:
https://usn.ubuntu.com/4421-1/
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USN-4421-1: Thunderbird vulnerabilities
08 July 2020
thunderbird vulnerabilities
Releases
o Ubuntu 20.04 LTS
o Ubuntu 19.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
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, or execute arbtirary code. (CVE-2020-12405,
CVE-2020-12406, CVE-2020-12410, CVE-2020-12417, CVE-2020-12418,
CVE-2020-12419, CVE-2020-12420)
It was discovered that Thunderbird would continue an unencrypted
connection when configured to use STARTTLS for IMAP if the server
responded with PREAUTH. A remote attacker could potentially exploit
this to perform a person-in-the-middle attack in order to obtain
sensitive information. (CVE-2020-12398)
It was discovered that NSS showed timing differences when performing DSA
signatures. An attacker could potentially exploit this to obtain private
keys using a timing attack. (CVE-2020-12399)
It was discovered that when performing add-on updates, certificate chains
not terminating with built-in roots were silently rejected. This could
result in add-ons becoming outdated. (CVE-2020-12421)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o thunderbird - 1:68.10.0+build1-0ubuntu0.20.04.1
Ubuntu 19.10
o thunderbird - 1:68.10.0+build1-0ubuntu0.19.10.1
Ubuntu 18.04
o thunderbird - 1:68.10.0+build1-0ubuntu0.18.04.1
Ubuntu 16.04
o thunderbird - 1:68.10.0+build1-0ubuntu0.16.04.1
After a standard system update you need to restart Thunderbird to make
all the necessary changes.
References
o CVE-2020-12398
o CVE-2020-12399
o CVE-2020-12405
o CVE-2020-12406
o CVE-2020-12410
o CVE-2020-12417
o CVE-2020-12418
o CVE-2020-12419
o CVE-2020-12420
o CVE-2020-12421
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