CVE-2020-26961
published 2020-12-09CVE-2020-26961: 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…
PriorityP428medium6.5CVSS 3.1
AVNACLPRNUIRSUCNIHAN
EPSS
1.15%
63.0th percentile
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
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| debian | firefox-esr | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| debian | thunderbird | < firefox 83.0-1 (sid) | firefox 83.0-1 (sid) |
| mozilla | firefox | < 83 | 83 |
| mozilla | firefox | < 83.0 | 83.0 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < 78.5 | 78.5 |
| mozilla | thunderbird | < 78.5 | 78.5 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.5.0-1 | 1:78.5.0-1 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2020-11-25
CVE-2020-16012 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information across origins, bypass security restrictions,
conduct phishing attacks, conduct cross-site scripting (XSS) attacks,
bypass Content Security Policy (CSP) restrictions, conduct DNS rebinding
attacks, or execute arbitrary code.
Instructions: After a standard system update you need to restart Thunderbird to make
all the necessary changes.
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-11-19
CVE-2020-26958 Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
USN-4637-1 fixed vulnerabilities in Firefox. This update provides the
corresponding updates for Ubuntu 16.04 LTS.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across origins, bypass security restrictions, conduct phishing
attacks, conduct cross-site scripting (XSS) attacks, bypass Content
Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or
execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-11-18
CVE-2020-26952 Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across origins, bypass security restrictions, conduct phishing
attacks, conduct cross-site scripting (XSS) attacks, bypass Content
Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or
execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox to make
all the necessary changes.
Red Hat
Mozilla: DoH did not filter IPv4 mapped IP Addresses
vendor_redhat·2020-11-17·CVSS 6.5
CVE-2020-26961 [MEDIUM] CWE-358 Mozilla: DoH did not filter IPv4 mapped IP Addresses
Mozilla: DoH did not filter IPv4 mapped IP Addresses
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.
Package: firefox (Red Hat Enterprise Linux 5) - Out of support scope
Debian
CVE-2020-26961: firefox - When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP r...
vendor_debian·2020·CVSS 6.5
CVE-2020-26961 [MEDIUM] CVE-2020-26961: firefox - When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP r...
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.
Scope: local
sid: resolved (fixed in 83.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-50: CVE-2020-26961
vendor_mozilla·CVSS 6.5
CVE-2020-26961 [MEDIUM] Mozilla Foundation Security Advisory 2020-50: CVE-2020-26961
Mozilla Foundation Security Advisory 2020-50
CVE: CVE-2020-26961
Product: Firefox
Impact: high
Fixed in: Firefox 83
Mozilla
Mozilla Foundation Security Advisory 2020-51: CVE-2020-26961
vendor_mozilla·CVSS 6.5
CVE-2020-26961 [MEDIUM] Mozilla Foundation Security Advisory 2020-51: CVE-2020-26961
Mozilla Foundation Security Advisory 2020-51
CVE: CVE-2020-26961
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.5
Mozilla
Mozilla Foundation Security Advisory 2020-52: CVE-2020-26961
vendor_mozilla·CVSS 6.5
CVE-2020-26961 [MEDIUM] Mozilla Foundation Security Advisory 2020-52: CVE-2020-26961
Mozilla Foundation Security Advisory 2020-52
CVE: CVE-2020-26961
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.5
GHSA
GHSA-4fh9-jvf5-584j: 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
ghsa_unreviewed·2022-05-24
CVE-2020-26961 [MEDIUM] GHSA-4fh9-jvf5-584j: 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
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.
OSV
CVE-2020-26961: 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
osv·2020-12-09·CVSS 6.5
CVE-2020-26961 [MEDIUM] CVE-2020-26961: 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
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1672528https://www.mozilla.org/security/advisories/mfsa2020-50/https://www.mozilla.org/security/advisories/mfsa2020-51/https://www.mozilla.org/security/advisories/mfsa2020-52/https://bugzilla.mozilla.org/show_bug.cgi?id=1672528https://www.mozilla.org/security/advisories/mfsa2020-50/https://www.mozilla.org/security/advisories/mfsa2020-51/https://www.mozilla.org/security/advisories/mfsa2020-52/
2020-12-09
Published