CVE-2017-7842: Infoleak
First published: Tue Nov 14 2017(Updated: )
If a document's Referrer Policy attribute is set to "no-referrer" sometimes two network requests are made for "<link>" elements instead of one. One of these requests includes the referrer instead of respecting the set policy to not include a referrer on requests. 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=1397064
- 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-2017-7842
- 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-2017-7842
- https://security-tracker.debian.org/tracker/CVE-2017-7842
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7842
- https://nvd.nist.gov/vuln/detail/CVE-2017-7842
- https://ubuntu.com/security/CVE-2017-7842
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2017-7842?
CVE-2017-7842 is a vulnerability that affects Firefox versions up to 57.0.2 and allows two network requests to be made for <link> elements when the Referrer Policy attribute is set to 'no-referrer', with one of these requests including the referrer against the set policy.
Which software is affected by CVE-2017-7842?
Mozilla Firefox versions up to 57.0.2 are affected by CVE-2017-7842.
What is the severity of CVE-2017-7842?
CVE-2017-7842 has a severity rating of 5.3 (medium).
What is the solution for CVE-2017-7842?
To mitigate CVE-2017-7842, users should update to Firefox version 57.0.3 or later.
Where can I find more information about CVE-2017-7842?
You can find more information about CVE-2017-7842 on Bugzilla, Mozilla's security advisories page, and SecurityFocus.
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