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    Ubuntu 4373-1: Thunderbird vulnerabilities

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    Several security issues were fixed in Thunderbird.
    Ubuntu Security Notice USN-4373-1
    May 26, 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
    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 context,
    an attacker could potentially exploit these to cause a denial of service,
    or execute arbitrary code. (CVE-2020-6831, CVE-2020-12387, CVE-2020-12395)
    It was discovered that the Devtools’ ‘Copy as cURL’ feature did not
    properly escape the HTTP POST data of a request. If a user were tricked
    in to using the ‘Copy as cURL’ feature to copy and paste a command with
    specially crafted data in to a terminal, an attacker could potentially
    exploit this to obtain sensitive information from local files.
    It was discovered that Thunderbird did not correctly handle Unicode
    whitespace characters within the From email header. An attacker could
    potentially exploit this to spoof the sender email address that
    Thunderbird displays. (CVE-2020-12397)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 20.04 LTS:
      thunderbird                     1:68.8.0+build2-0ubuntu0.20.04.2
    Ubuntu 19.10:
      thunderbird                     1:68.8.0+build2-0ubuntu0.19.10.2
    Ubuntu 18.04 LTS:
      thunderbird                     1:68.8.0+build2-0ubuntu0.18.04.2
    Ubuntu 16.04 LTS:
      thunderbird                     1:68.8.0+build2-0ubuntu0.16.04.2
    After a standard system update you need to restart Thunderbird to make
    all the necessary changes.
      CVE-2020-12387, CVE-2020-12392, CVE-2020-12395, CVE-2020-12397,
    Package Information:

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