CVE-2020-15680
First published: Tue Oct 20 2020(Updated: )
If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <82 | 82 |
| <82 | 82 | |
| Mozilla Firefox | <82.0 |
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Reference Links
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2020-15680?
CVE-2020-15680 is a vulnerability in Mozilla Firefox that allows an attacker to probe whether an external protocol handler is registered.
How does CVE-2020-15680 work?
CVE-2020-15680 works by referencing a valid external protocol handler in an image tag, allowing the attacker to distinguish between a broken image size of a non-existent protocol handler and a broken image size of a registered protocol handler.
What is the severity of CVE-2020-15680?
The severity of CVE-2020-15680 is medium, with a severity value of 4.
Which software is affected by CVE-2020-15680?
Mozilla Firefox version up to but excluding 82 is affected by CVE-2020-15680.
How can I fix CVE-2020-15680?
To fix CVE-2020-15680, update Mozilla Firefox to version 82 or newer.
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