- Vulnerability/
- USN-4365-1
USN-4365-1: Bind vulnerabilities
First published: Tue May 19 2020(Updated: )
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind incorrectly limited certain fetches. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service, or possibly use Bind to perform a reflection attack. (CVE-2020-8616) Tobias Klein discovered that Bind incorrectly handled checking TSIG validity. A remote attacker could use this issue to cause Bind to crash, resulting in a denial of service, or possibly perform other attacks. (CVE-2020-8617)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/bind9 | <1:9.16.1-0ubuntu2.1 | 1:9.16.1-0ubuntu2.1 |
| =20.04 | ||
| All of | ||
| ubuntu/bind9 | <1:9.11.5.P4+dfsg-5.1ubuntu2.2 | 1:9.11.5.P4+dfsg-5.1ubuntu2.2 |
| =19.10 | ||
| All of | ||
| ubuntu/bind9 | <1:9.11.3+dfsg-1ubuntu1.12 | 1:9.11.3+dfsg-1ubuntu1.12 |
| =18.04 | ||
| All of | ||
| ubuntu/bind9 | <1:9.10.3.dfsg.P4-8ubuntu1.16 | 1:9.10.3.dfsg.P4-8ubuntu1.16 |
| =16.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2020-8616
- https://ubuntu.com/security/CVE-2020-8617
- https://ubuntu.com/security/notices/USN-4365-2
- https://launchpad.net/ubuntu/+source/bind9/1:9.16.1-0ubuntu2.1
- https://launchpad.net/ubuntu/+source/bind9/1:9.11.5.P4+dfsg-5.1ubuntu2.2
- https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.12
- https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.16
- https://ubuntu.com/security/notices/USN-4365-1 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2020-8616?
The severity of CVE-2020-8616 is not mentioned in the vulnerability report.
How can a remote attacker exploit CVE-2020-8616?
A remote attacker can exploit CVE-2020-8616 by causing Bind to consume resources or performing a reflection attack.
Which version of Bind is affected by this vulnerability?
Versions 1:9.16.1-0ubuntu2.1, 1:9.11.5.P4+dfsg-5.1ubuntu2.2, 1:9.11.3+dfsg-1ubuntu1.12, and 1:9.10.3.dfsg.P4-8ubuntu1.16 are affected by this vulnerability.
How do I fix CVE-2020-8616?
To fix CVE-2020-8616, update to the specified remedy versions for the affected Bind packages.
Where can I find more information about USN-4365-1?
You can find more information about USN-4365-1 on the Ubuntu security notice page.
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