Linux Security
    Linux Security
    Linux Security

    Ubuntu 4421-1: Thunderbird vulnerabilities

    Date 08 Jul 2020
    358
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in Thunderbird.
    ==========================================================================
    Ubuntu Security Notice USN-4421-1
    July 08, 2020
    
    thunderbird vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    - Ubuntu 19.10
    - 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:
    
    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 obtain private
    keys using a timing attack. (CVE-2020-12399)
    
    It was discovered that when performing add-on updates, certificate chains
    not terminating with built-in roots were silently rejected. This could
    result in add-ons becoming outdated. (CVE-2020-12421)
    
    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.
    
    References:
      https://usn.ubuntu.com/4421-1
      CVE-2020-12398, CVE-2020-12399, CVE-2020-12405, CVE-2020-12406,
      CVE-2020-12410, CVE-2020-12417, CVE-2020-12418, CVE-2020-12419,
      CVE-2020-12420, CVE-2020-12421
    
    Package Information:
    
    https://launchpad.net/ubuntu/+source/thunderbird/1:68.10.0+build1-0ubuntu0.20.04.1
    
    https://launchpad.net/ubuntu/+source/thunderbird/1:68.10.0+build1-0ubuntu0.19.10.1
    
    https://launchpad.net/ubuntu/+source/thunderbird/1:68.10.0+build1-0ubuntu0.18.04.1
    
    https://launchpad.net/ubuntu/+source/thunderbird/1:68.10.0+build1-0ubuntu0.16.04.1
    
    

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