Vulnerability · Published Oct 1, 2020 · Assigned by mozilla
CVE-2020-15666
Medium 6.5
In plain English
A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.21 | firefox | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.22 | firefox | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.23 | firefox | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.21 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.22 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.23 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15666 |
| Alpine:v3.24 | librewolf | 80.0-r0 | ALPINE-CVE-2020-15666 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 80 |
| Mozilla | Firefox for Android | unspecified – before 80 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-39/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-36/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1450853 x_refsource_MISC