Ubuntu 4202-2: Thunderbird regression

    Date10 Dec 2019
    CategoryUbuntu
    158
    Posted ByLinuxSecurity Advisories
    USN-4202-1 caused a regression in Thunderbird.
    ==========================================================================
    Ubuntu Security Notice USN-4202-2
    December 10, 2019
    
    thunderbird regression
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 18.04 LTS
    
    Summary:
    
    USN-4202-1 caused a regression in Thunderbird.
    
    Software Description:
    - thunderbird: Mozilla Open Source mail and newsgroup client
    
    Details:
    
    USN-4202-1 fixed vulnerabilities in Thunderbird. After upgrading,
    Thunderbird
    created a new profile for some users. This update fixes the problem.
    
    We apologize for the inconvenience.
    
    Original advisory details:
    
     It was discovered that a specially crafted S/MIME message with an inner
     encryption layer could be displayed as having a valid signature in some
     circumstances, even if the signer had no access to the encrypted message.
     An attacker could potentially exploit this to spoof the message author.
     (CVE-2019-11755)
      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,
     bypass security restrictions, bypass same-origin restrictions, conduct
     cross-site scripting (XSS) attacks, or execute arbitrary code.
     (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759, CVE-2019-11760,
     CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764)
      A heap overflow was discovered in the expat library in Thunderbird. If a
     user were tricked in to opening a specially crafted message, an attacker
     could potentially exploit this to cause a denial of service, or execute
     arbitrary code. (CVE-2019-15903)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      thunderbird                     1:68.2.2+build1-0ubuntu0.19.10.1
    
    Ubuntu 18.04 LTS:
      thunderbird                     1:68.2.2+build1-0ubuntu0.18.04.1
    
    After a standard system update you need to restart Thunderbird to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4202-2
      https://usn.ubuntu.com/4202-1
      https://launchpad.net/bugs/1854150
    
    Package Information:
    
    https://launchpad.net/ubuntu/+source/thunderbird/1:68.2.2+build1-0ubuntu0.19.10.1
    
    https://launchpad.net/ubuntu/+source/thunderbird/1:68.2.2+build1-0ubuntu0.18.04.1
    
    
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