CVE-2020-8620
First published: Fri Aug 21 2020(Updated: )
In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.
Credit: security-officer@isc.org security-officer@isc.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ISC BIND | >=9.15.6<=9.16.5 | |
| ISC BIND | >=9.17.0<=9.17.3 | |
| ISC BIND | =9.9.12-s1 | |
| ISC BIND | =9.9.13-s1 | |
| ISC BIND | =9.11.3-s1 | |
| ISC BIND | =9.11.21-s1 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| Netapp Steelstore Cloud Integrated Storage | ||
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| debian/bind9 | 1:9.16.50-1~deb11u2 1:9.16.50-1~deb11u1 1:9.18.28-1~deb12u2 1:9.20.2-1 |
Remedy
Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.6 BIND 9.17.4
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
- https://kb.isc.org/docs/cve-2020-8620
- https://security.gentoo.org/glsa/202008-19
- https://security.netapp.com/advisory/ntap-20200827-0003/
- https://usn.ubuntu.com/4468-1/
- https://www.synology.com/security/advisory/Synology_SA_20_19
- https://launchpad.net/bugs/cve/CVE-2020-8620
- https://gitlab.isc.org/isc-projects/bind9/commit/9a372f2bce642545164d2b4408eb6c4e301acc5e
- https://security-tracker.debian.org/tracker/CVE-2020-8620
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8620
- https://nvd.nist.gov/vuln/detail/CVE-2020-8620
- https://ubuntu.com/security/CVE-2020-8620
Frequently Asked Questions
What is CVE-2020-8620?
CVE-2020-8620 is a vulnerability in BIND, a DNS software, that allows an attacker who can establish a TCP connection with the server to trigger an assertion failure and cause the server to exit.
What is the severity of CVE-2020-8620?
The severity of CVE-2020-8620 is high with a CVSS score of 7.5.
Which software versions are affected by CVE-2020-8620?
BIND versions 9.15.6 to 9.16.5 and 9.17.0 to 9.17.3 are affected by CVE-2020-8620.
How can an attacker exploit CVE-2020-8620?
An attacker who can establish a TCP connection with the vulnerable server can exploit CVE-2020-8620 by sending data on that connection to trigger the assertion failure.
Are there any references related to CVE-2020-8620?
Yes, you can find more information about CVE-2020-8620 in the following references: - http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html - http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html - https://kb.isc.org/docs/cve-2020-8620
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