USN-6143-1: Firefox vulnerabilities

Releases

• Ubuntu 20.04 LTS

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-2023-34414,
CVE-2023-34416, CVE-2023-34417)

Jun Kokatsu discovered that Firefox did not properly validate site-isolated
process for a document loaded from a data: URL that was the result of a
redirect, leading to an open redirect attack. An attacker could possibly
use this issue to perform phishing attacks. (CVE-2023-34415)

Update instructions

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

Ubuntu 20.04

• firefox - 114.0+build3-0ubuntu0.20.04.1

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

References

• CVE-2023-34414
• CVE-2023-34416
• CVE-2023-34415
• CVE-2023-34417

Related notices

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