Debian Security Update

Debian released security updates that fix multiple vulnerabilities with Thunderbird mail client, twig and dovecot Packages that leads to DOS, information disclosure and Arbitrary Code Execution.

DSA-4420 thunderbird

The security update covers multiple vulnerabilities with Thunderbird mail client that allows an attacker to execute an arbitrary code execution or denial of service.

The vulnerabilities can be tracked as CVE-2018-18506CVE-2019-9788CVE-2019-9790CVE-2019-9791CVE-2019-9792CVE-2019-9793CVE-2019-9795CVE-2019-9796

All the security issues addressed with version 1:60.6.1-1~deb9u1, users are recommended to update their thunderbird packages.

DSA-4419 twig

Twig is a template engine for PHP and it fails in enforcing the sandboxing that results in potential information disclosure.

The vulnerability has been fixed with version 1.24.0-2+deb9u1.

DSA-4418-1 dovecot

The vulnerability resides in the Dovecot email server on reading the FTS or POP3-UIDL headers from the Dovecot index.

Bounds index is not defined, which allows an attacker to modify the dovecot indexes, which leads to an privilege escalation or the execution of arbitrary code with the permissions of the dovecot user.

Installation using FTS or pop3 migration plugins are affected with the vulnerability and it has been fixed with has been fixed in version 1:2.2.27-3+deb9u4.

You can update the latest security updates by using apt package manager. Before running apt command add the repository to your source list.

deb http://security.debian.org/debian-security stretch/updates main contrib non-free

To be added with /etc/apt/sources.list file and to update apt-get update && apt-get upgrade.

Gurubaran is a PKI Security Engineer. Certified Ethical Hacker, Penetration Tester, Security blogger, Co-Founder & Author of GBHackers On Security.