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

[USN-6368-1] Thunderbird vulnerabilities

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Ubuntu Security Notice USN-6368-1
September 14, 2023

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

- 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-2023-4573, CVE-2023-4574,
CVE-2023-4575, CVE-2023-4581, CVE-2023-4584)

It was discovered that Thunderbird did not properly manage memory when
handling WebP images. If a user were tricked into opening a malicious WebP
image file, an attacker could potentially exploit these to cause a denial
of service or execute arbitrary code. (CVE-2023-4863)

Update instructions:

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

Ubuntu 23.04:
thunderbird 1:102.15.1+build1-0ubuntu0.23.04.1

Ubuntu 22.04 LTS:
thunderbird 1:102.15.1+build1-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
thunderbird 1:102.15.1+build1-0ubuntu0.20.04.1

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

References:
https://ubuntu.com/security/notices/USN-6368-1
CVE-2023-4573, CVE-2023-4574, CVE-2023-4575, CVE-2023-4581,
CVE-2023-4584, CVE-2023-4863

Package Information:
https://launchpad.net/ubuntu/+source/thunderbird/1:102.15.1+build1-0ubuntu0.23.04.1
https://launchpad.net/ubuntu/+source/thunderbird/1:102.15.1+build1-0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/thunderbird/1:102.15.1+build1-0ubuntu0.20.04.1