CWE
20
Advisory Published
CVE Published
Updated

CVE-2017-7770: Input Validation

First published: Tue Jun 13 2017(Updated: )

A mechanism where when a new tab is loaded through JavaScript events, if fullscreen mode is then entered, the addressbar will not be rendered. This would allow a malicious site to displayed a spoofed addressbar, showing the location of an arbitrary website instead of the one loaded. Note: this issue only affects Firefox for Android. Desktop Firefox is unaffected.

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Firefox<54
54
Firefox<54.0
Android

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2017-7770?

    CVE-2017-7770 has a high severity rating as it allows for potential phishing attacks by spoofing the address bar.

  • How do I fix CVE-2017-7770?

    To mitigate CVE-2017-7770, users should upgrade to a version of Firefox above 54.

  • What versions of Firefox are affected by CVE-2017-7770?

    CVE-2017-7770 affects all versions of Firefox up to and including version 54.

  • What type of attack can be executed using CVE-2017-7770?

    CVE-2017-7770 can be exploited to perform phishing attacks by displaying a spoofed address bar.

  • Is there a workaround for CVE-2017-7770?

    There are no known workarounds for CVE-2017-7770 other than upgrading Firefox to a secure version.

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