CVE-2017-7823

Publication date 2 October 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	18.04 LTS bionic	Fixed 56.0+build6-0ubuntu1
	17.10 artful	Fixed 56.0+build6-0ubuntu1
	17.04 zesty	Fixed 56.0+build6-0ubuntu0.17.04.1
	16.04 LTS xenial	Fixed 56.0+build6-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 56.0+build6-0ubuntu0.14.04.1
thunderbird	18.04 LTS bionic	Fixed 1:52.4.0+build1-0ubuntu2
	17.10 artful	Fixed 1:52.4.0+build1-0ubuntu2
	17.04 zesty	Fixed 1:52.4.0+build1-0ubuntu0.17.04.2
	16.04 LTS xenial	Fixed 1:52.4.0+build1-0ubuntu0.16.04.2
	14.04 LTS trusty	Fixed 1:52.4.0+build1-0ubuntu0.14.04.2

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.4 · Medium

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality impact	Low
Integrity impact	Low
Availability impact	None

Scores

Parameter	Value
Base score	5.4 · Medium
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3436-1
Thunderbird vulnerabilities
11 October 2017

USN-3435-1
Firefox vulnerabilities
2 October 2017