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Ubuntu Security Notice USN-7203-1
January 14, 2025

pdns, pdns-recursor vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in PowerDNS.

Software Description:
- pdns: extremely powerful and versatile nameserver
- pdns-recursor: PowerDNS Recursor

Details:

Wei Hao discovered that PowerDNS Authoritative Server incorrectly handled
memory when accessing certain files. An attacker could possibly use this
issue to achieve arbitrary code execution. (CVE-2018-1046)

It was discovered that PowerDNS Authoritative Server and PowerDNS Recursor
incorrectly handled memory when receiving certain remote input. An attacker
could possibly use this issue to cause denial of service. (CVE-2018-10851)

Kees Monshouwer discovered that PowerDNS Authoritative Server and PowerDNS
Recursor incorrectly handled request validation after having cached
malformed input. An attacker could possibly use this issue to cause denial
of service. (CVE-2018-14626)

Toshifumi Sakaguchi discovered that PowerDNS Recursor incorrectly handled
requests after having cached malformed input. An attacker could possibly
use this issue to cause denial of service. (CVE-2018-14644)

Nathaniel Ferguson discovered that PowerDNS Authoritative Server
incorrectly handled memory when receiving certain remote input. An attacker
could possibly use this issue to obtain sensitive information.
(CVE-2020-17482)

Nicolas Dehaine and Dmitry Shabanov discovered that PowerDNS Authoritative
Server and PowerDNS Recursor incorrectly handled IXFR requests in certain
circumstances. An attacker could possibly use this issue to cause denial of
service. (CVE-2022-27227)

Update instructions:

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

Ubuntu 22.04 LTS
   pdns-recursor                   4.6.0-1ubuntu1+esm1
                                   Available with Ubuntu Pro
   pdns-server                     4.5.3-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pdns-tools                      4.5.3-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 20.04 LTS
   pdns-recursor                   4.2.1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pdns-server                     4.2.1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pdns-tools                      4.2.1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 18.04 LTS
   pdns-recursor                   4.1.1-2ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pdns-server                     4.1.1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pdns-tools                      4.1.1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   pdns-recursor                   4.0.0~alpha2-2ubuntu0.1+esm1
                                   Available with Ubuntu Pro
   pdns-server                     4.0.0~alpha2-3ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pdns-tools                      4.0.0~alpha2-3ubuntu0.1~esm1
                                   Available with Ubuntu Pro

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

References:
   https://ubuntu.com/security/notices/USN-7203-1
   CVE-2018-1046, CVE-2018-10851, CVE-2018-14626, CVE-2018-14644,
   CVE-2020-17482, CVE-2022-27227