Vulnerability 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.

Severity: MEDIUM (6.5) Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

URL: https://nvd.nist.gov/vuln/detail/CVE-2020-26976
Published: Jan. 7, 2021
Modified: Feb. 15, 2021

Fixed packages

Package name
Branch
Fixed in version
Version from repository
Errata ID
Task #
State
firefoxsisyphus84.0-alt1126.0.1-alt1ALT-PU-2020-3529-1263596Fixed
firefoxp1084.0-alt1118.0.2-alt0.p10.1ALT-PU-2020-3529-1263596Fixed
firefoxp993.0-alt0.p9.1105.0.1-alt0.c9.1ALT-PU-2022-1782-1288073Fixed
firefoxc10f184.0-alt1112.0.2-alt0.p10.1ALT-PU-2020-3529-1263596Fixed
firefoxc9f293.0-alt0.p9.1105.0.1-alt0.c9.1ALT-PU-2021-3368-1288792Fixed
firefoxp1184.0-alt1126.0.1-alt1ALT-PU-2020-3529-1263596Fixed
firefox-esrsisyphus78.7.0-alt1115.11.0-alt1ALT-PU-2021-1158-1265286Fixed
firefox-esrp1091.1.0-alt1115.11.0-alt1ALT-PU-2021-2881-1284980Fixed
firefox-esrp978.7.0-alt0.1.p9102.11.0-alt0.c9.1ALT-PU-2021-1199-1265306Fixed
firefox-esrc10f191.1.0-alt1115.9.1-alt0.c10.1ALT-PU-2021-2881-1284980Fixed
firefox-esrc9f291.3.0-alt1.c9.1102.12.0-alt0.c9.1ALT-PU-2021-3369-1288792Fixed
firefox-esrp1178.7.0-alt1115.11.0-alt1ALT-PU-2021-1158-1265286Fixed
thunderbirdsisyphus78.7.0-alt1115.9.0-alt1ALT-PU-2021-1160-1265335Fixed
thunderbirdp1078.7.0-alt1115.9.0-alt1ALT-PU-2021-1160-1265335Fixed
thunderbirdp978.7.0-alt0.1.p9102.11.0-alt0.c9.1ALT-PU-2021-1200-1265306Fixed
thunderbirdc10f178.7.0-alt1115.9.0-alt0.c10.1ALT-PU-2021-1160-1265335Fixed
thunderbirdc9f278.7.0-alt0.1.c9102.11.0-alt0.c9.1ALT-PU-2021-1369-1264611Fixed
thunderbirdp1178.7.0-alt1115.9.0-alt1ALT-PU-2021-1160-1265335Fixed

References to Advisories, Solutions, and Tools

Hyperlink
Resource
https://www.mozilla.org/security/advisories/mfsa2020-54/
  • Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1674343
  • Issue Tracking
  • Permissions Required
  • Vendor Advisory
DSA-4840
  • Third Party Advisory
GLSA-202102-02
  • Third Party Advisory
DSA-4842
  • Third Party Advisory
[debian-lts-announce] 20210202 [SECURITY] [DLA 2539-1] firefox-esr security update
  • Mailing List
  • Third Party Advisory
[debian-lts-announce] 20210202 [SECURITY] [DLA 2541-1] thunderbird security update
  • Mailing List
  • Third Party Advisory

    1. Configuration 1

      cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
      End excliding
      84.0

      Configuration 2

      cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
      cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
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