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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1513 bind9 security update 5 May 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: bind9 Publisher: Debian Operating System: Debian GNU/Linux Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-25216 CVE-2021-25215 CVE-2021-25214 Reference: ESB-2021.1504 ESB-2021.1498 ESB-2021.1494 Original Bulletin: http://www.debian.org/lts/security/2021/dla-2647 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 - - ------------------------------------------------------------------------- Debian LTS Advisory DLA-2647-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Emilio Pozuelo Monfort May 04, 2021 https://wiki.debian.org/LTS - - ------------------------------------------------------------------------- Package : bind9 Version : 1:9.10.3.dfsg.P4-12.3+deb9u9 CVE ID : CVE-2021-25214 CVE-2021-25215 CVE-2021-25216 Debian Bug : 987741 987742 987743 Several vulnerabilities were discovered in BIND, a DNS server implementation. CVE-2021-25214 Greg Kuechle discovered that a malformed incoming IXFR transfer could trigger an assertion failure in named, resulting in denial of service. CVE-2021-25215 Siva Kakarla discovered that named could crash when a DNAME record placed in the ANSWER section during DNAME chasing turned out to be the final answer to a client query. CVE-2021-25216 It was discovered that the SPNEGO implementation used by BIND is prone to a buffer overflow vulnerability. This update switches to use the SPNEGO implementation from the Kerberos libraries. For Debian 9 stretch, these problems have been fixed in version 1:9.10.3.dfsg.P4-12.3+deb9u9. We recommend that you upgrade your bind9 packages. For the detailed security status of bind9 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/bind9 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEcJymx+vmJZxd92Q+nUbEiOQ2gwIFAmCRICAACgkQnUbEiOQ2 gwLfyhAAyZP7P7hqsimWu7ZNipax9YCbWUTt7kXTdhK+Qg6EpevgklCFdlJq6oea ukrJAPlHdgqC29TURjnBOZvHjqNLP9UPIY4v8rXBcmoqjQHwqNZvU0/Bh5vLNpFj dFi9PW3a3xsAwl9vGAGXlkov1bXIcG2ixGsAq7sNvPqu5wNqrG7M1IRVgFHlR5t+ OoDeCGnHnW+cri3Ci7VScO9oY3qme/AqQez3Q5MdhnY7B9BexDGDlhL+zO68qCFy jb5JesIQ8df5NTO671iNmrffd5LzDlL+Bo1mtyuu7jkvtm6l3tRGY6uNq2zZ9m8/ Wh88teXt8Hf0On4aeY5Rn8y3yEHHj76ys07S9Nm9vxw0sJEnSabI5HnP13Xg6HDa OE6HuaTfUnVAaJ0W+JIvJX6Z4zMx5ImDb1ZcoXgq76bE2HpezUJ/bhZy4Nz6sQpM EXsqDeis1dsLfTkZkV4fPIBjcoSQY9xVJo9vekDo4F6ohVRr1MzbKZCZ0Dv3/o7U akaW6zarpXfzFp++6E/+sE+dxCFO1J9ohWPgp16yZe5lHGS9wTeKhlFpIa48EK25 ZQ2a8dO5ZRJQ303cMewzJpDC2nn/vX3v8utmtwyuzGBdVOdxbNgq6ja/4JTUMQNg AL1668phEmZ0a7Q+AbdEPiewnL4ETwsJ48nr26H7lN5++zqXjew= =0I9N - -----END PGP SIGNATURE----- - --------------------------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). 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