1. Ubuntu Security Notices
  2. USN-6998-1

USN-6998-1: Unbound vulnerabilities

Publication date

11 September 2024

Overview

Several security issues were fixed in Unbound.

Releases

Packages

  • 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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
24.04 noble libunbound8 –  1.19.2-1ubuntu3.2
unbound –  1.19.2-1ubuntu3.2
unbound-host –  1.19.2-1ubuntu3.2
22.04 jammy libunbound8 –  1.13.1-1ubuntu5.7
unbound –  1.13.1-1ubuntu5.7
unbound-host –  1.13.1-1ubuntu5.7
20.04 focal libunbound8 –  1.9.4-2ubuntu1.8
unbound –  1.9.4-2ubuntu1.8
unbound-host –  1.9.4-2ubuntu1.8
18.04 bionic libunbound2 –  1.6.7-1ubuntu2.6+esm2  
unbound –  1.6.7-1ubuntu2.6+esm2  
unbound-host –  1.6.7-1ubuntu2.6+esm2  
16.04 xenial libunbound2 –  1.5.8-1ubuntu1.1+esm1  
unbound –  1.5.8-1ubuntu1.1+esm1  
unbound-host –  1.5.8-1ubuntu1.1+esm1  
14.04 trusty libunbound2 –  1.4.22-1ubuntu4.14.04.3+esm1  
unbound –  1.4.22-1ubuntu4.14.04.3+esm1  
unbound-host –  1.4.22-1ubuntu4.14.04.3+esm1  

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References

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