A Thunderbird security update has been released for Ubuntu Linux 20.04 LTS, 22.04 LTS, 23.04, and 23.10.

[USN-6515-1] Thunderbird vulnerabilities

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Ubuntu Security Notice USN-6515-1
November 27, 2023

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-2023-6206, CVE-2023-6212)

It was discovered that Thudnerbird did not properly manage memory when
images were created on the canvas element. An attacker could potentially
exploit this issue to obtain sensitive information. (CVE-2023-6204)

It discovered that Thunderbird incorrectly handled certain memory when
using a MessagePort. An attacker could potentially exploit this issue to
cause a denial of service. (CVE-2023-6205)

It discovered that Thunderbird incorrectly did not properly manage ownership
in ReadableByteStreams. An attacker could potentially exploit this issue
to cause a denial of service. (CVE-2023-6207)

It discovered that Thudnerbird incorrectly did not properly manage copy
operations when using Selection API in X11. An attacker could potentially
exploit this issue to obtain sensitive information. (CVE-2023-6208)

Rachmat Abdul Rokhim discovered that Thunderbird incorrectly handled
parsing of relative URLS starting with "///". An attacker could potentially
exploit this issue to cause a denial of service. (CVE-2023-6209)

Update instructions:

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

Ubuntu 23.10:
thunderbird 1:115.5.0+build1-0ubuntu0.23.10.1

Ubuntu 23.04:
thunderbird 1:115.5.0+build1-0ubuntu0.23.04.1

Ubuntu 22.04 LTS:
thunderbird 1:115.5.0+build1-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
thunderbird 1:115.5.0+build1-0ubuntu0.20.04.1

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

References:
https://ubuntu.com/security/notices/USN-6515-1
CVE-2023-6204, CVE-2023-6205, CVE-2023-6206, CVE-2023-6207,
CVE-2023-6208, CVE-2023-6209, CVE-2023-6212

Package Information:
https://launchpad.net/ubuntu/+source/thunderbird/1:115.5.0+build1-0ubuntu0.23.10.1
https://launchpad.net/ubuntu/+source/thunderbird/1:115.5.0+build1-0ubuntu0.23.04.1
https://launchpad.net/ubuntu/+source/thunderbird/1:115.5.0+build1-0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/thunderbird/1:115.5.0+build1-0ubuntu0.20.04.1