=========================================================================Ubuntu Security Notice USN-5816-1
January 23, 2023

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

Niklas Baumstark discovered that a compromised web child process of Firefox
could disable web security opening restrictions, leading to a new child
process being spawned within the file:// context. An attacker could
potentially exploits this to obtain sensitive information. (CVE-2023-23597)

Tom Schuster discovered that Firefox was not performing a validation check
on GTK drag data. An attacker could potentially exploits this to obtain
sensitive information. (CVE-2023-23598)

Vadim discovered that Firefox was not properly sanitizing a curl command
output when copying a network request from the developer tools panel. An
attacker could potentially exploits this to hide and execute arbitrary
commands. (CVE-2023-23599)

Luan Herrera discovered that Firefox was not stopping navigation when
dragging a URL from a cross-origin iframe into the same tab. An attacker
potentially exploits this to spoof the user. (CVE-2023-23601)

Dave Vandyke discovered that Firefox did not properly implement CSP policy
when creating a WebSocket in a WebWorker. An attacker who was able to
inject markup into a page otherwise protected by a Content Security Policy
may have been able to inject an executable script. (CVE-2023-23602)

Dan Veditz discovered that Firefox did not properly implement CSP policy
on regular expression when using console.log. An attacker potentially
exploits this to exfiltrate data from the browser. (CVE-2023-23603)

Nika Layzell discovered that Firefox was not performing a validation check
when parsing a non-system html document via DOMParser::ParseFromSafeString.
An attacker potentially exploits this to bypass web security checks.
(CVE-2023-23604)

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-2023-23605,
CVE-2023-23606)

Update instructions:

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

Ubuntu 20.04 LTS:
  firefox                         109.0+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         109.0+build2-0ubuntu0.18.04.1

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

References:
  https://ubuntu.com/security/notices/USN-5816-1
  CVE-2023-23597, CVE-2023-23598, CVE-2023-23599, CVE-2023-23601,
  CVE-2023-23602, CVE-2023-23603, CVE-2023-23604, CVE-2023-23605,
  CVE-2023-23606

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/109.0+build2-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/firefox/109.0+build2-0ubuntu0.18.04.1