CVE-2017-7834: XSS
First published: Tue Nov 14 2017(Updated: )
A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when "data:" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <57 | 57 |
| Mozilla Firefox | <=56.0.2 | |
| debian/firefox | 131.0.2-2 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1358009
- https://www.mozilla.org/security/advisories/mfsa2017-24/
- http://www.securityfocus.com/bid/101832
- http://www.securitytracker.com/id/1039803
- https://launchpad.net/bugs/cve/CVE-2017-7834
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/#CVE-2017-7840
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/#CVE-2017-7834
- https://security-tracker.debian.org/tracker/CVE-2017-7834
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7834
- https://nvd.nist.gov/vuln/detail/CVE-2017-7834
- https://ubuntu.com/security/CVE-2017-7834
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2017-7834?
CVE-2017-7834 refers to a vulnerability in Mozilla Firefox that allows for bypasses of the Content Security Policy (CSP) and the execution of JavaScript.
How does CVE-2017-7834 affect Mozilla Firefox?
CVE-2017-7834 affects Mozilla Firefox versions up to and including 57.0.2.
What is the severity of CVE-2017-7834?
CVE-2017-7834 has a severity rating of medium with a CVSS score of 6.1.
How can I fix CVE-2017-7834?
To fix CVE-2017-7834, it is recommended to update Mozilla Firefox to version 57.0.1 or later.
Where can I find more information about CVE-2017-7834?
You can find more information about CVE-2017-7834 on the Mozilla Bugzilla and Mozilla Security Advisories websites.
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