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CVE Vulnerabilities

CVE-2020-26961

Published: Dec 09, 2020 | Modified: Nov 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
6.1 MODERATE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-26961
CWEhttps://cwe.mitre.org/data/definitions/.html

When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Affected Software

NameVendorStart VersionEnd Version
FirefoxMozilla*83.0 (excluding)
Firefox_esrMozilla*78.5 (excluding)
ThunderbirdMozilla*78.5 (excluding)
Red Hat Enterprise Linux 6RedHatthunderbird-0:78.5.0-1.el6_10*
Red Hat Enterprise Linux 6RedHatfirefox-0:78.5.0-1.el6_10*
Red Hat Enterprise Linux 7RedHatthunderbird-0:78.5.0-1.el7_9*
Red Hat Enterprise Linux 7RedHatfirefox-0:78.5.0-1.el7_9*
Red Hat Enterprise Linux 8RedHatthunderbird-0:78.5.0-1.el8_3*
Red Hat Enterprise Linux 8RedHatfirefox-0:78.5.0-1.el8_3*
Red Hat Enterprise Linux 8.0 Update Services for SAP SolutionsRedHatthunderbird-0:78.5.0-1.el8_0*
Red Hat Enterprise Linux 8.0 Update Services for SAP SolutionsRedHatfirefox-0:78.5.0-1.el8_0*
Red Hat Enterprise Linux 8.1 Extended Update SupportRedHatthunderbird-0:78.5.0-1.el8_1*
Red Hat Enterprise Linux 8.1 Extended Update SupportRedHatfirefox-0:78.5.0-1.el8_1*
Red Hat Enterprise Linux 8.2 Extended Update SupportRedHatthunderbird-0:78.5.0-1.el8_2*
Red Hat Enterprise Linux 8.2 Extended Update SupportRedHatfirefox-0:78.5.0-1.el8_2*
FirefoxUbuntubionic*
FirefoxUbuntudevel*
FirefoxUbuntufocal*
FirefoxUbuntugroovy*
FirefoxUbuntuhirsute*
FirefoxUbuntuimpish*
FirefoxUbuntujammy*
FirefoxUbuntukinetic*
FirefoxUbuntulunar*
FirefoxUbuntumantic*
FirefoxUbuntunoble*
FirefoxUbuntutrusty*
FirefoxUbuntuupstream*
FirefoxUbuntuxenial*
Mozjs38Ubuntubionic*
Mozjs38Ubuntuesm-apps/bionic*
Mozjs38Ubuntuupstream*
Mozjs52Ubuntubionic*
Mozjs52Ubuntuesm-apps/focal*
Mozjs52Ubuntuesm-infra/bionic*
Mozjs52Ubuntufocal*
Mozjs52Ubuntugroovy*
Mozjs52Ubuntuupstream*
Mozjs60Ubuntuupstream*
Mozjs68Ubuntuesm-infra/focal*
Mozjs68Ubuntufocal*
Mozjs68Ubuntugroovy*
Mozjs68Ubuntuupstream*
ThunderbirdUbuntubionic*
ThunderbirdUbuntudevel*
ThunderbirdUbuntufocal*
ThunderbirdUbuntugroovy*
ThunderbirdUbuntuhirsute*
ThunderbirdUbuntuimpish*
ThunderbirdUbuntujammy*
ThunderbirdUbuntukinetic*
ThunderbirdUbuntulunar*
ThunderbirdUbuntumantic*
ThunderbirdUbuntunoble*
ThunderbirdUbuntutrusty*
ThunderbirdUbuntuupstream*
ThunderbirdUbuntuxenial*

References

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