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Ubuntu 14.04 ESM: USN-4365-2 Critical Bind Security Issues and Fixes

ubuntu
Calendar Grey May 20, 2020
Dist Ubuntu Esm H88
Numerous vulnerabilities addressed in Bind for Ubuntu 12.04 and 14.04 ESM impacting connectivity.
Several security issues were fixed in Bind.

Summary

Several security issues were fixed in Bind.

Software Description:

- bind9: Internet Domain Name Server

Details:

USN-4365-1 fixed several vulnerabilities in Bind. This update provides

the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.

Original advisory details:

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)

Topics%20covered

Topics Covered

security advisory denial of service network security security update bind ubuntu resource exhaustion

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 ESM:
  bind9                           1:9.9.5.dfsg-3ubuntu0.19+esm2

Ubuntu 12.04 ESM:
  bind9                           1:9.8.1.dfsg.P1-4ubuntu0.30

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4365-2

https://ubuntu.com/security/notices/USN-4365-1

CVE-2020-8616, CVE-2020-8617

Severity
critical
Lowest
Low
Medium
High
Critical

May 20, 2020

Topics%20covered

Topics Covered

security advisory denial of service network security security update bind ubuntu resource exhaustion

Package Information

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