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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3805 PowerDNS Security Advisory 2018-09 10 December 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: PowerDNS Publisher: PowerDNS Operating System: UNIX variants (UNIX, Linux, OSX) BSD variants Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-16855 Original Bulletin: https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-09.html - --------------------------BEGIN INCLUDED TEXT-------------------- PowerDNS Security Advisory 2018-09: Crafted query can cause a denial of service * CVE: CVE-2018-16855 * Date: 26th of November 2018 * Affects: PowerDNS Recursor from 4.1.0 up to and including 4.1.7 * Not affected: 4.0.x, 4.1.8 * Severity: Medium * Impact: Denial of service * Exploit: This problem can be triggered via crafted queries * Risk of system compromise: No * Solution: Upgrade to a non-affected version An issue has been found in PowerDNS Recursor where a remote attacker sending a DNS query can trigger an out-of-bounds memory read while computing the hash of the query for a packet cache lookup, possibly leading to a crash. This issue has been assigned CVE-2018-16855 by Red Hat. When the PowerDNS Recursor is run inside a supervisor like supervisord or systemd, a crash will lead to an automatic restart, limiting the impact to a somewhat degraded service. PowerDNS Recursor from 4.1.0 up to and including 4.1.7 is affected. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXA2r7maOgq3Tt24GAQiifxAAoZEIai++4vy98ZSsKs0gPrVxF1BaiyzD VG0yw0GTLWpyVhtYzlVjOQ3rns4WmTCe/MxjjXluCMjKIE9kzcH6+6V3aZyKBhtW QtNFVQ9074rkzsTCK4alAgNXTx9ZpnT4kSJKEnPl5m16WA40IM437W0c8kVJyB18 BUpNnF1Qa3Nb8jrVuTbbVjD7ssip0rvUfVNKK+RlHXBT+nsVniBSuasouxkNcBmN y3JUglAhVJ3j/HMSZNbSJjBlEnE1apo8bTrNDguQdAWT9b4qDxwTjcOMOsL3kRne qksVE4TO/mrpE2WQb3mxDd4By788nNaPoImig+RF4iCnAWSDY2RH+jCYlOfCLp9T 33mFVyjzBIxN8YGWLKbYI21ZZO8hanXmFLj3HI1ja8o1Tpteb6WWdizT70uVvG5t MCg2VB6k6e6bCRm18bIwyHeBx25xwoQ0ChFPSTCElWjqgJnQcnVAdxWcRx6bj/Dy HiY7HAeuuNDlQHwqGzaJH9b6dvk4eaRHU58SuNfG5SKvIj9Ems5mJqtEOCrgrEZx 0jR+p/wlYdUNCp/Z47NAeth2VSJRKgDdMQBiiO/eTnHvH0WG6rD1aRB7P5Gc9EE6 1gNDgiVppnkqTcfU35R5QqIksVXFNd/tO7bEMR0VTba5qxSFmAbFJj1NaPs2XsLz IxTvx1qVt80= =WpMI -----END PGP SIGNATURE-----