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CVE-2020-15666

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-4474-1
Posted Aug 26, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4474-1 - Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, trick the user in to installing a malicious extension, spoof the URL bar, leak sensitive information between origins, or execute arbitrary code. It was discovered that NSS incorrectly handled certain signatures. An attacker could possibly use this issue to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2020-12400, CVE-2020-15665, CVE-2020-15666, CVE-2020-15668
SHA-256 | 9c3f9b8a995f19fc2e46e69b42485c8da02e85dd0a8cc8530e25b865bb07d168
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