CVE-2020-8622
bind9 - security update
Description
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.
How to fix CVE-2020-8622
To remediate CVE-2020-8622, upgrade the affected package to a fixed version below.
- —upgrade to 9.16.6-r0 or later
- —upgrade to 1:9.16.6-1 or later
- —upgrade to 1:9.10.3.dfsg.P4-12.3+deb9u7 or later
Is CVE-2020-8622 being exploited?
Low — EPSS is 2.6%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 9.16.6-r0
- from 0, < 1:9.16.6-1
- from 0, < 1:9.10.3.dfsg.P4-12.3+deb9u7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |