Skip to main content
No exploitation reportedFix available

CVE-2017-5456

No exploitation reported by the sources we read.

  • Published2018-06-11
  • WeaknessCWE-732

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A mechanism to bypass file system access protections in the sandbox using the file system request constructor through an IPC message. This allows for read and write access to the local file system. This vulnerability affects Firefox ESR < 52.1 and Firefox < 53.

Timeline

dates in UTC
  1. 2018-06-1121:29CVE publishedNVD

Versions per branch

NVD
Redhat enterprise linux server eus
BranchAffectedFixed in
7.3= 7.3no fix published
7.4= 7.4no fix published
7.5= 7.5no fix published
Mozilla firefox
BranchAffectedFixed in
53.0< 53.053.0
52.1< 52.1.052.1.0
Redhat enterprise linux server aus
BranchAffectedFixed in
7.3= 7.3no fix published
7.4= 7.4no fix published

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • firefoxUbuntu:16.04:LTSall versions · fixed in 53.0+build6-0ubuntu0.16.04.1
  • firefoxUbuntu:14.04:LTSall versions · fixed in 53.0+build6-0ubuntu0.14.04.1
  • firefoxRed Hat:enterprise_linux:7::workstationall versions · fixed in 0:52.1.0-2.el7_3and 1 other package
  • firefoxRed Hat:enterprise_linux:7::serverall versions · fixed in 0:52.1.0-2.el7_3and 1 other package
  • firefoxRed Hat:enterprise_linux:7::clientall versions · fixed in 0:52.1.0-2.el7_3and 1 other package
  • firefox-esropenSUSE:Tumbleweedall versions · fixed in 128.5.1-1.1
  • firefox-gcc5SUSE:Linux Enterprise Server for SAP Applications 11 SP4all versions · fixed in 5.3.1+r233831-7.1and 1 other package
  • firefox-gcc5SUSE:Linux Enterprise Server 11 SP4all versions · fixed in 5.3.1+r233831-7.1and 1 other package

42 more package ranges on OSV.dev

Vendor advisories

  • CVE-2017-5456 Red Hat Product Security27 products fixed · 1 known affected

    Mozilla: Sandbox escape allowing local file system read access (MFSA 2017-12)

    firefox.src as a component of Red Hat Enterprise Linux 5

  • RHSA-2017:1106 Red Hat Product Security27 products fixed

    Red Hat Security Advisory: firefox security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2017:1106 · 27 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the update, Firefox must be restarted for the changes to take effect.
  2. No fix planned, says the vendor Red Hat Product Security CVE-2017-5456 · 1 productWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-06-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-59p4-f6m8-9792

Frequently asked questions

What is CVE-2017-5456?

A mechanism to bypass file system access protections in the sandbox using the file system request constructor through an IPC message. This allows for read and write access to the local file system. This vulnerability affects Firefox ESR < 52.1 and Firefox < 53.

Is CVE-2017-5456 actively exploited?

Active exploitation of CVE-2017-5456 has not been confirmed. Its EPSS score was 2.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-5456?

CVE-2017-5456 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running Mozilla? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record