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USN-6267-1: Firefox vulnerabilities

2 August 2023

Several security issues were fixed in Firefox.

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Releases

Packages

  • firefox - Mozilla Open Source web browser

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)

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.
(CVE-2023-4046)

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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 20.04

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

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