Ubuntu Security Notice USN-6782-1

Ubuntu Security Notice USN-6782-1
May 22, 2024

thunderbird vulnerabilities

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

– Ubuntu 23.10
– Ubuntu 22.04 LTS
– Ubuntu 20.04 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 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-2024-4767, CVE-2024-4768,
CVE-2024-4769, CVE-2024-4777)

Thomas Rinsma discovered that Thunderbird did not properly handle type check
when handling fonts in PDF.js. An attacker could potentially exploit this
issue to execute arbitrary javascript code in PDF.js. (CVE-2024-4367)

Irvan Kurniawan discovered that Thunderbird did not properly handle certain
font styles when saving a page to PDF. An attacker could potentially
exploit this issue to cause a denial of service. (CVE-2024-4770)

Update instructions:

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

Ubuntu 23.10
thunderbird 1:115.11.0+build2-0ubuntu0.23.10.1

Ubuntu 22.04 LTS
thunderbird 1:115.11.0+build2-0ubuntu0.22.04.1

Ubuntu 20.04 LTS
thunderbird 1:115.11.0+build2-0ubuntu0.20.04.1

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

CVE-2024-4367, CVE-2024-4767, CVE-2024-4768, CVE-2024-4769,
CVE-2024-4770, CVE-2024-4777

Package Information:

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