USN-4150-1: Thunderbird vulnerabilities

8 October 2019

thunderbird vulnerabilities

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

  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Thunderbird.

Software Description

  • thunderbird - Mozilla Open Source mail and newsgroup client

Details

It was discovered that encrypted S/MIME parts in a multipart message can leak plaintext contents when included in a HTML reply or forward in some circumstances. If a user were tricked in to replying to or forwarding a specially crafted message, an attacker could potentially exploit this to obtain sensitive information. (CVE-2019-11739)

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 obtain sensitive information, conduct cross-site scripting (XSS) attack, scause a denial of service, or execute arbitrary code. (CVE-2019-11740, CVE-2019-11742, CVE-2019-11743, CVE-2019-11744, CVE-2019-11746, CVE-2019-11752)

Update instructions

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

Ubuntu 19.04
thunderbird - 1:60.9.0+build1-0ubuntu0.19.04.1
Ubuntu 18.04 LTS
thunderbird - 1:60.9.0+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
thunderbird - 1:60.9.0+build1-0ubuntu0.16.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References