CVE-2020-8622

2020-08-2000:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.004 Low

EPSS

Percentile

74.1%

JSON

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

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchbind9< 1:9.11.3+dfsg-1ubuntu1.13UNKNOWN
ubuntu20.04noarchbind9< 1:9.16.1-0ubuntu2.3UNKNOWN
ubuntu14.04noarchbind9< 1:9.9.5.dfsg-3ubuntu0.19+esm3) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchbind9< 1:9.10.3.dfsg.P4-8ubuntu1.17UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	bind9	< 1:9.11.3+dfsg-1ubuntu1.13	UNKNOWN
ubuntu	20.04	noarch	bind9	< 1:9.16.1-0ubuntu2.3	UNKNOWN
ubuntu	14.04	noarch	bind9	< 1:9.9.5.dfsg-3ubuntu0.19+esm3) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	bind9	< 1:9.10.3.dfsg.P4-8ubuntu1.17	UNKNOWN