CVE-2017-7823
Publication date 2 October 2017
Last updated 25 August 2025
Ubuntu priority
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
| Package | Ubuntu Release | Status |
|---|---|---|
| firefox | 18.04 LTS bionic |
Fixed 56.0+build6-0ubuntu1
|
| 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
|
| 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
| Parameter | Value |
|---|---|
| Base score |
5.4 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| 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