Ubuntu 20.04 LTS: USN-4421-1 Critical: Thunderbird Security Issues

ubuntu

July 8, 2020

Several security issues were fixed in Thunderbird.

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, 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 ob...

Read the Full Advisory

Topics Covered

security advisory denial of service remote code execution Ubuntu information disclosure man-in-the-middle thunderbird

Update Instructions

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

Ubuntu 20.04 LTS:
  thunderbird                     1:68.10.0+build1-0ubuntu0.20.04.1

Ubuntu 19.10:
  thunderbird                     1:68.10.0+build1-0ubuntu0.19.10.1

Ubuntu 18.04 LTS:
  thunderbird                     1:68.10.0+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  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.