Netgate pfSense CE up to 2.9.0 DNS Resolver services_unbound_advanced.php sock_queue_timeout crlf injection

Summaryinfo

A vulnerability was found in Netgate pfSense CE up to 2.9.0. It has been declared as problematic. This vulnerability affects unknown code of the file services_unbound_advanced.php of the component DNS Resolver. Executing a manipulation of the argument sock_queue_timeout can lead to crlf injection. The identification of this vulnerability is CVE-2026-111228. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Netgate pfSense CE up to 2.9.0. It has been declared as problematic. This vulnerability affects some unknown processing of the file services_unbound_advanced.php of the component DNS Resolver. The manipulation of the argument sock_queue_timeout with an unknown input leads to a crlf injection vulnerability. The CWE definition for the vulnerability is CWE-93. The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. As an impact it is known to affect integrity, and availability. CVE summarizes:

Netgate pfSense CE from 2.7.1 through 2.9.0 contains a CRLF injection vulnerability in services_unbound_advanced.php that allows authenticated users with DNS Resolver: Advanced privilege to inject Unbound directives. Attackers can embed CR/LF characters in the unvalidated sock_queue_timeout parameter, which is written raw into unbound.conf, to override local records and forwarding for all clients.

The advisory is available at github.com. This vulnerability was named CVE-2026-111228 since 10/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/15/2026).

By approaching the search of inurl:services_unbound_advanced.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Firewall Software

Vendor

• Netgate

Name

• pfSense CE

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9.0

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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