=========================================================================Ubuntu Security Notice USN-4335-1
April 21, 2020

thunderbird vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Thunderbird.

Software Description:
- 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 security restrictions, bypass
same-origin restrictions, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759,
CVE-2019-11760, CVE-2019-11761, CVE-2019-11762, CVE-2019-11763,
CVE-2019-11764, CVE-2019-17005, CVE-2019-17008, CVE-2019-17010,
CVE-2019-17011, CVE-2019-17012, CVE-2019-17016, CVE-2019-17017,
CVE-2019-17022, CVE-2019-17024, CVE-2019-17026, CVE-2019-20503,
CVE-2020-6798, CVE-2020-6800, CVE-2020-6805, CVE-2020-6806, CVE-2020-6807,
CVE-2020-6812, CVE-2020-6814, CVE-2020-6819, CVE-2020-6820, CVE-2020-6821,
CVE-2020-6825)

It was discovered that NSS incorrectly handled certain memory operations.
A remote attacker could potentially exploit this to cause a denial of
service, or execute arbitrary code. (CVE-2019-11745)

It was discovered that a specially crafted S/MIME message with an inner
encryption layer could be displayed as having a valid signature in some
circumstances, even if the signer had no access to the encrypted message.
An attacker could potentially exploit this to spoof the message author.
(CVE-2019-11755)

A heap overflow was discovered in the expat library in Thunderbird. If a
user were tricked in to opening a specially crafted message, an attacker
could potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2019-15903)

It was discovered that Message ID calculation was based on uninitialized
data. An attacker could potentially exploit this to obtain sensitive
information. (CVE-2020-6792)

Mutiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted message, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, or execute arbitrary code. (CVE-2020-6793, CVE-2020-6795,
CVE-2020-6822)

It was discovered that if a user saved passwords before Thunderbird 60 and
then later set a master password, an unencrypted copy of these passwords
would still be accessible. A local user could exploit this to obtain
sensitive information. (CVE-2020-6794)

It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
fully escape website-controlled data. If a user were tricked in to using
the ‘Copy as cURL’ feature to copy and paste a command with specially
crafted data in to a terminal, an attacker could potentially exploit this
to execute arbitrary commands via command injection. (CVE-2020-6811)

Update instructions:

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

Ubuntu 16.04 LTS:
  thunderbird                     1:68.7.0+build1-0ubuntu0.16.04.2

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

References:
  https://ubuntu.com/security/notices/USN-4335-1
  CVE-2019-11745, CVE-2019-11755, CVE-2019-11757, CVE-2019-11758,
  CVE-2019-11759, CVE-2019-11760, CVE-2019-11761, CVE-2019-11762,
  CVE-2019-11763, CVE-2019-11764, CVE-2019-15903, CVE-2019-17005,
  CVE-2019-17008, CVE-2019-17010, CVE-2019-17011, CVE-2019-17012,
  CVE-2019-17016, CVE-2019-17017, CVE-2019-17022, CVE-2019-17024,
  CVE-2019-17026, CVE-2019-20503, CVE-2020-6792, CVE-2020-6793,
  CVE-2020-6794, CVE-2020-6795, CVE-2020-6798, CVE-2020-6800,
  CVE-2020-6805, CVE-2020-6806, CVE-2020-6807, CVE-2020-6811,
  CVE-2020-6812, CVE-2020-6814, CVE-2020-6819, CVE-2020-6820,
  CVE-2020-6821, CVE-2020-6822, CVE-2020-6825

Package Information:

https://launchpad.net/ubuntu/+source/thunderbird/1:68.7.0+build1-0ubuntu0.16.04.2