Information Exposure Affecting firefox package, versions <80.0-1


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High

    Threat Intelligence

    EPSS 0.16% (52nd percentile)
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NVD
6.5 medium

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  • Snyk ID SNYK-DEBIANUNSTABLE-FIREFOX-608752
  • published 26 Aug 2020
  • disclosed 1 Oct 2020

How to fix?

Upgrade Debian:unstable firefox to version 80.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

When trying to load a non-video in an audio/video context the exact status code (200, 302, 404, 500, 412, 403, etc.) was disclosed via the MediaError Message. This level of information leakage is inconsistent with the standardized onerror/onsuccess disclosure and can lead to inferring login status to services or device discovery on a local network among other attacks. This vulnerability affects Firefox < 80 and Firefox for Android < 80.