CVE-2019-9802

Name: CVE-2019-9802
Creator: NVD / NIST
Published: 2019-04-26T17:29:03.163+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.13%

Last modified Jun 17, 2026

CVE-2019-9802 is a vulnerability of currently unknown severity. If a Sandbox content process is compromised, it can initiate an FTP download which will then use a child process to render the downloaded data. The downloaded data can then be passed to the Chrome process with an arbitrary file length supplied by an attacker, bypassing sandbox protections and allow for a potential memory read of adjacent data from the privileged Chrome process, which may include sensitive data. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

Description

If a Sandbox content process is compromised, it can initiate an FTP download which will then use a child process to render the downloaded data. The downloaded data can then be passed to the Chrome process with an arbitrary file length supplied by an attacker, bypassing sandbox protections and allow for a potential memory read of adjacent data from the privileged Chrome process, which may include sensitive data. This vulnerability affects Firefox < 66.

Metrics

EPSS Probability

1.13%

62.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 66.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1415508Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-07/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1415508Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-07/Vendor Advisory

Timeline

Published: Apr 26, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9802?

How severe is CVE-2019-9802?

Severity scoring for CVE-2019-9802 is pending analysis. The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9802?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9802?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST