CVE-2020-8622
Published: 20 August 2020
In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
Notes
Author | Note |
---|---|
alexmurray | Affects versions 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND Supported Preview Edition |
Priority
Status
Package | Release | Status |
---|---|---|
bind9 Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
xenial |
Released
(1:9.10.3.dfsg.P4-8ubuntu1.17)
|
|
trusty |
Released
(1:9.9.5.dfsg-3ubuntu0.19+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
bionic |
Released
(1:9.11.3+dfsg-1ubuntu1.13)
|
|
focal |
Released
(1:9.16.1-0ubuntu2.3)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |