VDB
DEBIAN-CVE-2020-26961
DEBIAN-CVE-2020-26961
PUBLISHED
CVSS 6.5 MEDIUM
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.
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | thunderbird | 0 |
| Debian:13 | firefox-esr | 0 |
| Debian:14 | thunderbird | 0 |
| Debian:13 | thunderbird | 0 |
| Debian:14 | firefox-esr | 0 |
| Debian:12 | firefox-esr | 0 |
Timeline
- Dec 9, 2020 CVE Published
- Oct 26, 2026 CVE Updated