Debian Security Bug TrackerDEBIANCVE:CVE-2020-26961CVE-2020-26961
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
46.6%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 999 | all | firefox | < 83.0-1 | firefox_83.0-1_all.deb |
| Debian | 12 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 11 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 10 | all | firefox-esr | < 78.5.0esr-1~deb10u1 | firefox-esr_78.5.0esr-1~deb10u1_all.deb |
| Debian | 999 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 13 | all | firefox-esr | < 78.5.0esr-1 | firefox-esr_78.5.0esr-1_all.deb |
| Debian | 12 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 11 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
| Debian | 10 | all | thunderbird | < 1:78.5.0-1~deb10u1 | thunderbird_1:78.5.0-1~deb10u1_all.deb |
| Debian | 999 | all | thunderbird | < 1:78.5.0-1 | thunderbird_1:78.5.0-1_all.deb |
Related
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
46.6%