high
7.5
CWE
617
Advisory Published
Updated

CVE-2020-8617

First published: Tue May 19 2020(Updated: )

ISC BIND is vulnerable to a denial of service, caused by a logic error in code which checks TSIG validity. A remote attacker could exploit this vulnerability to trigger an assertion failure in tsig.c.

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<=9.11.18
ISC BIND>=9.12.0<=9.12.4
ISC BIND>=9.13.0<=9.13.7
ISC BIND>=9.14.0<=9.14.11
ISC BIND>=9.15.0<=9.15.6
ISC BIND>=9.16.0<=9.16.2
ISC BIND>=9.17.0<=9.17.1
ISC BIND=9.12.4-p1
ISC BIND=9.12.4-p2
ISC BIND=9.9.3-s1
ISC BIND=9.10.5-s1
ISC BIND=9.10.7-s1
ISC BIND=9.11.3-s1
ISC BIND=9.11.5-s3
ISC BIND=9.11.5-s5
ISC BIND=9.11.6-s1
ISC BIND=9.11.7-s1
ISC BIND=9.11.8-s1
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Fedoraproject Fedora=31
Fedoraproject Fedora=32
openSUSE Leap=15.1
openSUSE Leap=15.2
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Canonical Ubuntu Linux=20.04
ubuntu/bind9<1:9.9.5.dfsg-3ubuntu0.19+
1:9.9.5.dfsg-3ubuntu0.19+
ubuntu/bind9<1:9.10.3.dfsg.
1:9.10.3.dfsg.
ubuntu/bind9<1:9.11.3+dfsg-1ubuntu1.12
1:9.11.3+dfsg-1ubuntu1.12
ubuntu/bind9<1:9.11.5.
1:9.11.5.
ubuntu/bind9<1:9.16.1-0ubuntu2.1
1:9.16.1-0ubuntu2.1
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

http://www.openwall.com/lists/oss-security/2020/05/19/4

Remedy

https://kb.isc.org/docs/cve-2020-8617

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-8617?

    CVE-2020-8617 is a vulnerability in ISC BIND that allows an attacker to cause a denial-of-service by exploiting a logic error in the code that checks TSIG validation.

  • How severe is CVE-2020-8617?

    CVE-2020-8617 has a severity score of 7.5 out of 10, indicating a high severity vulnerability.

  • Which software versions are affected by CVE-2020-8617?

    CVE-2020-8617 affects BIND versions 9.0.0 to 9.11.18, 9.12.0 to 9.12.4-p2, 9.13.0 to 9.13.7, 9.14.0 to 9.14.11, 9.15.0 to 9.15.6, 9.16.0 to 9.16.2, and 9.17.0 to 9.17.1.

  • How can I fix CVE-2020-8617?

    To fix CVE-2020-8617, it is recommended to upgrade to the patched versions of BIND: 9.11.5.P4+dfsg-5.1+deb10u7 or later for Debian, and follow the guidance provided by the vendor for other affected software.

  • Where can I find more information about CVE-2020-8617?

    You can find more information about CVE-2020-8617 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](http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html).

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