USN-3436-1: Thunderbird vulnerabilities

11 October 2017

thunderbird vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


Several security issues were fixed in Thunderbird.

Software Description

  • thunderbird - Mozilla Open Source mail and newsgroup client


Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing-like context, an attacker could potentially exploit these to read uninitialized memory, bypass phishing and malware protection, conduct cross-site scripting (XSS) attacks, cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7793, CVE-2017-7810, CVE-2017-7814, CVE-2017-7818, CVE-2017-7819, CVE-2017-7823, CVE-2017-7824)

Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7805)

Update instructions

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

Ubuntu 17.04
thunderbird - 1:52.4.0+build1-0ubuntu0.17.04.2
Ubuntu 16.04 LTS
thunderbird - 1:52.4.0+build1-0ubuntu0.16.04.2
Ubuntu 14.04 LTS
thunderbird - 1:52.4.0+build1-0ubuntu0.14.04.2

To update your system, please follow these instructions:

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