Advisories

==========================================================================
Ubuntu Security Notice USN-5168-2
December 01, 2021

thunderbird vulnerability
==========================================================================

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

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Thunderbird could be made to crash or run programs if it verified a
specially crafted signature.

Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client

Details:

Tavis Ormandy discovered that NSS, included with Thunderbird, incorrectly
handled verifying DSA/RSA-PSS signatures. A remote attacker could use this
issue to cause Thunderbird to crash, resulting in a denial of service, or
possibly execute arbitrary code.

Update instructions:

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

Ubuntu 21.10:
  thunderbird                     1:91.3.1+build1-0ubuntu0.21.10.2

Ubuntu 21.04:
  thunderbird                     1:78.14.0+build1-0ubuntu0.21.04.2

Ubuntu 20.04 LTS:
  thunderbird                     1:78.14.0+build1-0ubuntu0.20.04.2

Ubuntu 18.04 LTS:
  thunderbird                     1:78.14.0+build1-0ubuntu0.18.04.2

After a standard system update you need to restart Thunderbird to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5168-2
  https://ubuntu.com/security/notices/USN-5168-1
  CVE-2021-43527

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/1:91.3.1+build1-0ubuntu0.21.10.2
  https://launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.21.04.2
  https://launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.20.04.2
  https://launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.18.04.2

Ubuntu 5168-2: Thunderbird vulnerability

December 1, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.10 - Ubuntu 21.04 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Thunderbird could be made to crash or run programs if it verified a specially crafted signature. Software Description: - thunderbird: Mozilla Open Source mail and newsgroup client Details: Tavis Ormandy discovered that NSS, included with Thunderbird, incorrectly handled verifying DSA/RSA-PSS signatures. A remote attacker could use this issue to cause Thunderbird to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10: thunderbird 1:91.3.1+build1-0ubuntu0.21.10.2 Ubuntu 21.04: thunderbird 1:78.14.0+build1-0ubuntu0.21.04.2 Ubuntu 20.04 LTS: thunderbird 1:78.14.0+build1-0ubuntu0.20.04.2 Ubuntu 18.04 LTS: thunderbird 1:78.14.0+build1-0ubuntu0.18.04.2 After a standard system update you need to restart Thunderbird to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5168-2

https://ubuntu.com/security/notices/USN-5168-1

CVE-2021-43527

Severity
Ubuntu Security Notice USN-5168-2

Package Information

https://launchpad.net/ubuntu/+source/thunderbird/1:91.3.1+build1-0ubuntu0.21.10.2 https://launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.21.04.2 https://launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.20.04.2 https://launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.18.04.2

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