CVE-2020-15666CWE-209

CVE-2020-15666

Medium · published October 1, 2020

CVSS v3.1
6.5
EPSS
1%
Percentile
68.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.01238 · 68.9th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2020-10-01T23:15Z
Affected products (2)
ProductVersionsFixed in
mozilla/firefox< 80.080.0
mozilla/firefox_mobile< 80.080.0
References (6)
https://bugzilla.mozilla.org/show_bug.cgi?id=1450853 · [email protected]https://www.mozilla.org/security/advisories/mfsa2020-36/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2020-39/ · [email protected]https://bugzilla.mozilla.org/show_bug.cgi?id=1450853 · af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2020-36/ · af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2020-39/ · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 01 OCT 18:42Z
    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
    cvelistv5