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Ubuntu Security Notice USN-6509-2

Ubuntu Security Notice USN-6509-2
Posted Dec 4, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6509-2 - USN-6509-1 fixed vulnerabilities in Firefox. The update introduced several minor regressions. This update fixes the problem. Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. It was discovered that Firefox did not properly manage memory when images were created on the canvas element. An attacker could potentially exploit this issue to obtain sensitive information. It discovered that Firefox incorrectly handled certain memory when using a MessagePort. An attacker could potentially exploit this issue to cause a denial of service. It discovered that Firefox incorrectly did not properly manage ownership in ReadableByteStreams. An attacker could potentially exploit this issue to cause a denial of service. It discovered that Firefox incorrectly did not properly manage copy operations when using Selection API in X11. An attacker could potentially exploit this issue to obtain sensitive information. Rachmat Abdul Rokhim discovered incorrectly handled parsing of relative URLS starting with "///". An attacker could potentially exploit this issue to cause a denial of service.

tags | advisory, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2023-6204, CVE-2023-6205, CVE-2023-6207, CVE-2023-6208, CVE-2023-6209, CVE-2023-6210
SHA-256 | ad83f1762f0c9b91d83173c5919f250795adb5f0c74dd9b083106a33e56ea5bf

Ubuntu Security Notice USN-6509-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-6509-2
December 04, 2023

firefox regressions
==========================================================================

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

- Ubuntu 20.04 LTS

Summary:

USN-6509-1 caused some minor regressions in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-6509-1 fixed vulnerabilities in Firefox. The update introduced
several minor regressions. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2023-6206,
CVE-2023-6210, CVE-2023-6211, CVE-2023-6212, CVE-2023-6213)

It was discovered that Firefox 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 Firefox 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 Firefox 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 Firefox 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 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 20.04 LTS:
firefox 120.0.1+build1-0ubuntu0.20.04.1

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

References:
https://ubuntu.com/security/notices/USN-6509-2
https://ubuntu.com/security/notices/USN-6509-1
https://launchpad.net/bugs/2045518

Package Information:
https://launchpad.net/ubuntu/+source/firefox/120.0.1+build1-0ubuntu0.20.04.1

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