[USN-6267-2] Firefox regressions
nishit.majithia at canonical.com
Tue Aug 8 05:57:05 UTC 2023
Ubuntu Security Notice USN-6267-2
August 08, 2023
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
USN-6267-1 caused some minor regressions in Firefox.
- firefox: Mozilla Open Source web browser
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.
Alexander Guryanov discovered that Firefox did not properly update the
value of a global variable in WASM JIT analysis in some circumstances. An
attacker could potentially exploit this issue to cause a denial of service.
Mark Brand discovered that Firefox did not properly validate the size of
an untrusted input stream. An attacker could potentially exploit this issue
to cause a denial of service. (CVE-2023-4050)
The problem can be corrected by updating your system to the following
Ubuntu 20.04 LTS:
After a standard system update you need to restart Firefox to make all the
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