high
7.5
CWE
617
Advisory Published
Updated

CVE-2020-8623

First published: Thu Aug 20 2020(Updated: )

In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker

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

Affected SoftwareAffected VersionHow to fix
ISC BIND>=9.10.0<=9.11.21
ISC BIND>=9.12.1<=9.16.5
ISC BIND>=9.17.0<=9.17.3
ISC BIND=9.10.5-s1
ISC BIND=9.11.21-s1
Fedoraproject Fedora=31
Fedoraproject Fedora=32
openSUSE Leap=15.1
openSUSE Leap=15.2
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Synology DNS Server<2.2.2-5027
Netapp Steelstore Cloud Integrated Storage
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<1:9.10.3.dfsg.
1:9.10.3.dfsg.
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

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-8623?

    CVE-2020-8623 is a vulnerability in BIND DNS software that allows an attacker to crash a vulnerable system with a specially crafted query packet.

  • Which versions of BIND are affected by CVE-2020-8623?

    BIND versions 9.10.0 to 9.11.21, 9.12.0 to 9.16.5, and 9.17.0 to 9.17.3 are affected by CVE-2020-8623.

  • How can an attacker exploit the CVE-2020-8623 vulnerability?

    An attacker can exploit the CVE-2020-8623 vulnerability by sending a specially crafted query packet to a vulnerable BIND DNS server.

  • What is the severity of CVE-2020-8623?

    CVE-2020-8623 has a severity score of 7.5 (High).

  • Are there any references for CVE-2020-8623?

    Yes, you can find references for CVE-2020-8623 at the following links: [Link 1](https://kb.isc.org/docs/cve-2020-8623), [Link 2](https://gitlab.isc.org/isc-projects/bind9/commit/ac3862a5da95bb07b6cf748b0958175687a9de1d), [Link 3](https://gitlab.isc.org/isc-projects/bind9/commit/8d807cc21655eaa6e6a08afafeec3682c0f3f2ab).

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