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Vulnerabilities / CVE-2017-5456

critical

CVE-2017-5456

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

Published Modified CWE 732
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Oracle. Rated lower by Red Hat (high), Ubuntu (medium).

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.

Affected packages and fixed versions

SourcePackageFixed in
Oracle Linux 7firefox52.1.0-2.0.1.el7_3
ubuntu 14.04firefox53.0+build6-0ubuntu0.14.04.1
ubuntu 16.04firefox53.0+build6-0ubuntu0.16.04.1
ubuntu 16.10firefox53.0+build6-0ubuntu0.16.10.1
ubuntu 17.04firefox53.0+build6-0ubuntu0.17.04.1

References

All 14 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.