-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-3904-1 security@xxxxxxxxxx https://www.debian.org/security/ Yves-Alexis Perez July 08, 2017 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : bind9 CVE ID : CVE-2017-3142 CVE-2017-3143 Debian Bug : 866564 Clément Berthaux from Synaktiv discovered two vulnerabilities in BIND, a DNS server implementation. They allow an attacker to bypass TSIG authentication by sending crafted DNS packets to a server. CVE-2017-3142 An attacker who is able to send and receive messages to an authoritative DNS server and who has knowledge of a valid TSIG key name may be able to circumvent TSIG authentication of AXFR requests via a carefully constructed request packet. A server that relies solely on TSIG keys for protection with no other ACL protection could be manipulated into: - providing an AXFR of a zone to an unauthorized recipient - accepting bogus NOTIFY packets CVE-2017-3143 An attacker who is able to send and receive messages to an authoritative DNS server and who has knowledge of a valid TSIG key name for the zone and service being targeted may be able to manipulate BIND into accepting an unauthorized dynamic update. For the oldstable distribution (jessie), these problems have been fixed in version 1:9.9.5.dfsg-9+deb8u12. For the stable distribution (stretch), these problems have been fixed in version 1:9.10.3.dfsg.P4-12.4. We recommend that you upgrade your bind9 packages. Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@xxxxxxxxxxxxxxxx -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEl0WwInMjgf6efq/1bdtT8qZ1wKUFAllg1V0ACgkQbdtT8qZ1 wKXMiQgAkvKV919VTYzDG2Sa9qMF8zbHhbjwF2VwBl9M+IK/lPoQK407465ZWEmd N3xaaKkbtNEZELrz5tkFy3ZRJq2lWIwxF38hegp2+nCll0K+giTRckW/oh0l592h pkchKlGBcpwNrDGEAYQRjUzY6J3MwMZkn4EaoC2S2kmF30HSJcx9W93Q5GdnOf7m MA301faXKc5zicbiu05iPtqqP/i6+EmlHIYSW+Hu0nYEYPIvVQcrdsjnpZLaqxGS 58Ge5/hy0qqvIV+fyqlyQBPwyT3DvtAQVChKtFojvZ/JRIvx+hwKj3CKa3uihU9A w2agXaZd3BobRVdUmjndYcrHrZTDBA== =20aK -----END PGP SIGNATURE-----
