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Ubuntu 24.04 LTS USN-6998-1 Critical: Unbound DoS and Memory Issues

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Calendar Grey September 11, 2024
Scroller Ubuntu
Ubuntu Security Notice USN-7001-1 addresses vulnerabilities in BIND across various versions, emphasizing potential memory leaks and Denial of Service threats.
Several security issues were fixed in Unbound.

Summary

Several security issues were fixed in Unbound.

Software Description:

- unbound: validating, recursive, caching DNS resolver

Details:

It was discovered that Unbound incorrectly handled string comparisons,

which could lead to a NULL pointer dereference. An attacker could

potentially use this issue to cause a denial of service. (CVE-2024-43167)

It was discovered that Unbound incorrectly handled memory in

cfg_mark_ports, which could lead to a heap buffer overflow. A local

attacker could potentially use this issue to cause a denial of service

or execute arbitrary code. (CVE-2024-43168)

Topics%20covered

Topics Covered

security advisory critical doS memory issue ubuntu unbound

Update Instructions

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

Ubuntu 24.04 LTS
   libunbound8                     1.19.2-1ubuntu3.2
   unbound                         1.19.2-1ubuntu3.2
   unbound-host                    1.19.2-1ubuntu3.2

Ubuntu 22.04 LTS
   libunbound8                     1.13.1-1ubuntu5.7
   unbound                         1.13.1-1ubuntu5.7
   unbound-host                    1.13.1-1ubuntu5.7

Ubuntu 20.04 LTS
   libunbound8                     1.9.4-2ubuntu1.8
   unbound                         1.9.4-2ubuntu1.8
   unbound-host                    1.9.4-2ubuntu1.8

Ubuntu 18.04 LTS
   libunbound2                     1.6.7-1ubuntu2.6+esm2
                                   Available with Ubuntu Pro
   unbound                         1.6.7-1ubuntu2.6+esm2
                                   Available with Ubuntu Pro
   unbound-host                    1.6.7-1ubuntu2.6+esm2
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   libunbound2                     1.5.8-1ubuntu1.1+esm1
                                   Available with Ubuntu Pro
   unbound                         1.5.8-1ubuntu1.1+esm1
                                   Available with Ubuntu Pro
   unbound-host                    1.5.8-1ubuntu1.1+esm1
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   libunbound2                     1.4.22-1ubuntu4.14.04.3+esm1
                                   Available with Ubuntu Pro
   unbound                         1.4.22-1ubuntu4.14.04.3+esm1
                                   Available with Ubuntu Pro
   unbound-host                    1.4.22-1ubuntu4.14.04.3+esm1
                                   Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-6998-1

CVE-2024-43167, CVE-2024-43168

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6998-1

Topics%20covered

Topics Covered

security advisory critical doS memory issue ubuntu unbound

Package Information

https://launchpad.net/ubuntu/+source/unbound/1.19.2-1ubuntu3.2
https://launchpad.net/ubuntu/+source/unbound/1.13.1-1ubuntu5.7
https://launchpad.net/ubuntu/+source/unbound/1.9.4-2ubuntu1.8

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