CVE-2020-26976 Information

Description

When a HTTPS pages was embedded in a HTTP page and there was a service worker registered for the former the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing. This vulnerability affects Firefox < 84.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Reference

https://www.mozilla.org/security/advisories/mfsa2020-54/ https://bugzilla.mozilla.org/show_bug.cgi?id=1674343 https://www.debian.org/security/2021/dsa-4840 https://security.gentoo.org/glsa/202102-02 https://www.debian.org/security/2021/dsa-4842 https://lists.debian.org/debian-lts-announce/2021/02/msg00001.html https://lists.debian.org/debian-lts-announce/2021/02/msg00002.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5