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Ubuntu 20.04: USN-6642-2 Addresses Moderate Security Flaws in Bind

ubuntu
Calendar Grey February 19, 2024
Scroller Ubuntu
Several Bind security flaws discovered in Ubuntu 20.04 LTS could result in possible denial of service; system updates advised.
Several security issues were fixed in Bind.

Summary

Several security issues were fixed in Bind.

Software Description:

- bind9: Internet Domain Name Server

Details:

Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered

that Bind incorrectly handled parsing large DNS messages. A remote attacker

could possibly use this issue to cause Bind to consume resources, leading

to a denial of service. (CVE-2023-4408)

Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered

that Bind icorrectly handled validating DNSSEC messages. A remote attacker

could possibly use this issue to cause Bind to consume resources, leading

to a denial of service. (CVE-2023-50387)

It was discovered that Bind incorrectly handled preparing an NSEC3 closest

encloser proof. A remote attacker could possibly use this issue to cause

Bind to consume resources, leading to a denial of service. (CVE-2023-50868)

It was discovered that Bind incorrectly handled reverse zone queries when

nxdomain-redirect is enab...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu bind9 resource management

Update Instructions

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

Ubuntu 20.04 LTS:
   bind9                           1:9.16.48-0ubuntu0.20.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

https://ubuntu.com/security/notices/USN-6642-1

CVE-2023-4408, CVE-2023-50387, CVE-2023-50868, CVE-2023-5517,

CVE-2023-6516

Ubuntu Security Notice USN-6642-1

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu bind9 resource management

Package Information

https://launchpad.net/ubuntu/+source/bind9/1:9.16.48-0ubuntu0.20.04.1

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