medium
6.5
CWE
617
Advisory Published
Updated

CVE-2020-8622

First published: Thu Aug 20 2020(Updated: )

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.

Credit: security-officer@isc.org security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
IBM Cloud Pak for Security (CP4S)<=1.7.2.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
ISC BIND>=9.0.0<=9.11.21
ISC BIND>=9.12.0<=9.16.5
ISC BIND>=9.17.0<=9.17.3
ISC BIND=9.9.3-s1
ISC BIND=9.11.21-s1
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Netapp Steelstore Cloud Integrated Storage
openSUSE Leap=15.1
openSUSE Leap=15.2
Synology DNS Server<2.2.2-5028
Oracle Communications Diameter Signaling Router>=8.0.0<=8.5.0
ubuntu/bind9<1:9.10.3.dfsg.
1:9.10.3.dfsg.
ubuntu/bind9<1:9.11.3+dfsg-1ubuntu1.13
1:9.11.3+dfsg-1ubuntu1.13
ubuntu/bind9<1:9.16.1-0ubuntu2.3
1:9.16.1-0ubuntu2.3
ubuntu/bind9<1:9.9.5.dfsg-3ubuntu0.19+
1:9.9.5.dfsg-3ubuntu0.19+
debian/bind9
1:9.11.5.P4+dfsg-5.1+deb10u7
1:9.11.5.P4+dfsg-5.1+deb10u10
1:9.16.44-1~deb11u1
1:9.16.48-1
1:9.18.19-1~deb12u1
1:9.18.24-1
1:9.19.21-1

Remedy

https://www.oracle.com/security-alerts/cpuoct2021.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-8622?

    The severity of CVE-2020-8622 is medium.

  • How does CVE-2020-8622 affect ISC BIND?

    CVE-2020-8622 affects ISC BIND versions 9.0.0 to 9.11.21, 9.12.0 to 9.16.5, and 9.17.0 to 9.17.3.

  • How can an attacker exploit CVE-2020-8622?

    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 a denial of service.

  • Which software versions are affected by CVE-2020-8622?

    ISC BIND versions 9.0.0 to 9.11.21, 9.12.0 to 9.16.5, and 9.17.0 to 9.17.3 are affected by CVE-2020-8622.

  • Where can I find more information about CVE-2020-8622?

    You can find more information about CVE-2020-8622 in the references provided: [link1](http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html), [link2](http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html), [link3](https://kb.isc.org/docs/cve-2020-8622).

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