CVE-2017-5471

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-11 · updated 2026-06-17
Weakness: CWE-119

Description

Memory safety bugs were reported in Firefox 53. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 54.

Affected products

Mozilla Firefox: before 54.0 — fixed in 54.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 54.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/99042
http://www.securitytracker.com/id/1038689
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1349604%2C1318645%2C1361098%2C1361100%2C1341026%2C1349421%2C1360852%2C1299147%2C1352073%2C1354853%2C1366446%2C1342181%2C1343069
https://www.mozilla.org/security/advisories/mfsa2017-15/
http://www.securityfocus.com/bid/99042
http://www.securitytracker.com/id/1038689
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1349604%2C1318645%2C1361098%2C1361100%2C1341026%2C1349421%2C1360852%2C1299147%2C1352073%2C1354853%2C1366446%2C1342181%2C1343069
https://www.mozilla.org/security/advisories/mfsa2017-15/

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