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Date: Fri, 20 Jan 2023 13:19:43 +0100 (CET)
From: Otto Moerbeek <>
To: "" <>
Subject: Security Advisory 2023-01 for PowerDNS Recursor 4.8.0


   Today we have released PowerDNS Recursor 4.8.1 due to a high severity
   issue found.

   Please find the full text of the advisory below.

   The [1]changelog is available.

   The [2]tarball ([3]signature) is available from our download [4]server.
   Patches are available at [5]patches. Packages for various distributions
   are available from our [6]repository.

   Note that PowerDNS Recursor 4.5.x and older releases are End of Life.
   Consult the [7]EOL policy for more details.

PowerDNS Security Advisory 2023-01: unbounded recursion results in program

     * CVE: CVE-2023-22617
     * Date: 20th of January 2023
     * Affects: PowerDNS Recursor 4.8.0
     * Not affected: PowerDNS Recursor < 4.8.0, PowerDNS Recursor 4.8.1
     * Severity: High
     * Impact: Denial of service
     * Exploit: This problem can be triggered by a remote attacker with
       access to the recursor by querying names from specific
       mis-configured domains
     * Risk of system compromise: None
     * Solution: Upgrade to patched version

   CVSS 3.0 score: 8.2 (High)

   Thanks to for reporting this issue and their assistance in diagnosing it.




kind regards,
Otto Moerbeek
PowerDNS Developer 


Open-Xchange AG, Hohenzollernring 72, 50672 Cologne, District Court Cologne HRB 95366 
Managing Board: Andreas Gauger, Dirk Valbert, Frank Hoberg, Stephan Martin 
Chairman of the Board: Richard Seibt 
PowerDNS.COM BV, Koninginnegracht 14L, 2514 AA Den Haag, The Netherlands
Managing Director: Robert Brandt, Maxim Letski

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