CVE-2017-5456

Publication date 20 April 2017

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
firefox 17.04 zesty
Fixed 53.0+build6-0ubuntu0.17.04.1
16.10 yakkety
Fixed 53.0+build6-0ubuntu0.16.10.1
16.04 LTS xenial
Fixed 53.0+build6-0ubuntu0.16.04.1
14.04 LTS trusty
Fixed 53.0+build6-0ubuntu0.14.04.1
12.04 LTS precise Ignored
thunderbird 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-3260-1
    • Firefox vulnerabilities
    • 21 April 2017

Other references

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