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Ubuntu 20.04: USN-6267-2 Critical Firefox Offscreen Canvas Issue

ubuntu
Calendar Grey August 8, 2023
Dist Ubuntu Esm H88
USN-6268-3 security advisory addresses Chromium vulnerabilities in Ubuntu 20.04 LTS which affect application reliability, remedial steps recommended
USN-6267-1 caused some minor regressions in Firefox.

Summary

USN-6267-1 caused some minor regressions in Firefox.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

USN-6267-1 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-2023-4047,

CVE-2023-4048, CVE-2023-4049, CVE-2023-4051, CVE-2023-4053, CVE-2023-4055,

CVE-2023-4056, CVE-2023-4057, CVE-2023-4058)

Max Vlasov discovered that Firefox Offscreen Canvas did not properly track

cross-origin tainting. An attacker could potentially exploit this issue to

access image data from another site in violation of same-origin policy.

(CVE-2023-4045)

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical software update firefox ubuntu regression fix

Update Instructions

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

Ubuntu 20.04 LTS:
  firefox                         116.0.2+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-6267-2

https://ubuntu.com/security/notices/USN-6267-1

https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2030690

Severity
critical
Lowest
Low
Medium
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Critical

Ubuntu Security Notice USN-6267-2

Topics%20covered

Topics Covered

security advisory denial of service critical software update firefox ubuntu regression fix

Package Information

https://launchpad.net/ubuntu/+source/firefox/116.0.2+build1-0ubuntu0.20.04.1

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