CVE-2017-7813

Public Exploit

Description

Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.

Category

8.2
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.84% Top 30%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1383951 issue tracking exploit
http://www.securitytracker.com/id/1039465 third party advisory vdb entry
https://www.mozilla.org/security/advisories/mfsa2017-21/ vendor advisory
http://www.securityfocus.com/bid/101057 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-7813?
CVE-2017-7813 has been scored as a high severity vulnerability.
How to fix CVE-2017-7813?
To fix CVE-2017-7813, 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-2017-7813 being actively exploited in the wild?
It is possible that CVE-2017-7813 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7813?
CVE-2017-7813 affects Mozilla Firefox.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.