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Ubuntu 16.04 And 14.04: USN-5332-2 Critical Bind Cache Manipulation

ubuntu
Calendar Grey March 17, 2022
Dist Ubuntu Esm H88
Ubuntu 14.04 and 16.04 have new updates available to fix a bind9 vulnerability that threatens cache integrity. Users should apply these fixes quickly to avoid data issues
Bind could be made to manipulate cache results.

Summary

Bind could be made to manipulate cache results.

Software Description:

- bind9: Internet Domain Name Server

Details:

USN-5332-1 fixed a vulnerability in Bind. This update provides

the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Xiang Li, Baojun Liu, Chaoyi Lu, and Changgen Zou discovered that Bind

incorrectly handled certain bogus NS records when using forwarders. A

remote attacker could possibly use this issue to manipulate cache results.

(CVE-2021-25220)

Topics%20covered

Topics Covered

security advisory bug fix ubuntu bind9 cache manipulation

Update Instructions

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

Ubuntu 16.04 ESM:
  bind9                           1:9.10.3.dfsg.P4-8ubuntu1.19+esm2

Ubuntu 14.04 ESM:
  bind9                           1:9.9.5.dfsg-3ubuntu0.19+esm6

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

References

https://ubuntu.com/security/notices/USN-5332-2

https://ubuntu.com/security/notices/USN-5332-1

CVE-2021-25220

Severity
critical
Lowest
Low
Medium
High
Critical

March 17, 2022

Topics%20covered

Topics Covered

security advisory bug fix ubuntu bind9 cache manipulation

Package Information

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