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Ubuntu Security Notice USN-6563-1
January 02, 2024

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 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 into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code.(CVE-2023-6857, CVE-2023-6858,
CVE-2023-6859, CVE-2023-6861, CVE-2023-6862, CVE-2023-6863, CVE-2023-6864)

Marcus Brinkmann discovered that Thunderbird did not properly parse a PGP/MIME
payload that contains digitally signed text. An attacker could potentially
exploit this issue to spoof an email message. (CVE-2023-50762)

Marcus Brinkmann discovered that Thunderbird did not properly compare the
signature creation date with the message date and time when using digitally
signed S/MIME email message. An attacker could potentially exploit this
issue to spoof date and time of an email message. (CVE-2023-50761)

DoHyun Lee discovered that Thunderbird did not properly manage memory when
used on systems with the Mesa VM driver. An attacker could potentially
exploit this issue to execute arbitrary code. (CVE-2023-6856)

Andrew Osmond discovered that Thunderbird did not properly validate the
textures produced by remote decoders. An attacker could potentially exploit
this issue to escape the sandbox. (CVE-2023-6860)

Update instructions:

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

Ubuntu 23.10:
  thunderbird                     1:115.6.0+build2-0ubuntu0.23.10.1

Ubuntu 23.04:
  thunderbird                     1:115.6.0+build2-0ubuntu0.23.04.1

Ubuntu 22.04 LTS:
  thunderbird                     1:115.6.0+build2-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
  thunderbird                     1:115.6.0+build2-0ubuntu0.20.04.1

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-6563-1
  CVE-2023-50761, CVE-2023-50762, CVE-2023-6856, CVE-2023-6857,
  CVE-2023-6858, CVE-2023-6859, CVE-2023-6860, CVE-2023-6861,
  CVE-2023-6862, CVE-2023-6863, CVE-2023-6864

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/1:115.6.0+build2-0ubuntu0.23.10.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:115.6.0+build2-0ubuntu0.23.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:115.6.0+build2-0ubuntu0.22.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/1:115.6.0+build2-0ubuntu0.20.04.1