CVE-2023-34415

Description

When choosing a site-isolated process for a document loaded from a data: URL that was the result of a redirect, Firefox would load that document in the same process as the site that issued the redirect. This bypassed the site-isolation protections against Spectre-like attacks on sites that host an "open redirect". Firefox no longer follows HTTP redirects to data: URLs. This vulnerability affects Firefox < 114.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.10%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1811999 permissions required
https://www.mozilla.org/security/advisories/mfsa2023-20/ vendor advisory
https://security.gentoo.org/glsa/202401-10

Frequently Asked Questions

What is the severity of CVE-2023-34415?
CVE-2023-34415 has been scored as a medium severity vulnerability.
How to fix CVE-2023-34415?
To fix CVE-2023-34415, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-34415 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-34415 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-34415?
CVE-2023-34415 affects Mozilla Firefox.
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