Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server
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GSS-TSIG (Generic Security Service Algorithm for Secret Key Transaction Authentication for DNS) is defined in RFC 3645. It’s an extension to TSIG , which provides a lightweight protocol for authenticating and protecting the integrity of messages between, say, DNS client and server. TSIG¶. TSIG, as defined in RFC 2845, is a method for signing DNS messages using shared secrets.Each TSIG shared secret has a name, and PowerDNS can be told to allow zone transfer of a domain if the request is signed with an authorized name. In [RFC3645] section 2.2, GSS-TSIG specifies that the final transaction key (TKEY) response indicating successful negotiation has to be signed. In [RFC2845] section 3.4, TSIG specifies which data is to be digested when generating or verifying the contents of a TSIG record.
References 12. TSIG authentication bypass through signature forgery in Knot DNS Security advisory 06/23/17 Clément BERTHAUX www.synacktiv.com 5 rue Sextius Michel 75015 Paris Current Description . An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. A remote, unauthenticated attacker can cause a denial of service by sending crafted queries with a GSS-TSIG signature. Description: BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features.
Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server
85. Ytterligare används för att skapa TSIG- och DNSSEC-nycklar. Märkvärdigheter . i .
MS GSS-TSIG Interoperability. Microsoft has extended Kerberos to include authorization information. Microsoft Active Directory needs that authorization
Table: SRV GSS-TSIG starts with the TKEY meta-resource record mentioned above. It is defined in RFC. 8 Dec 2016 Following general limitations apply: • A NIOS appliance serving DHCP can send GSS-TSIG authenticated DDNS updates to an external DNS. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server 5 May 2014 gss-tsig, dynamic dns, nsupdate, gsstsig, kerberos, openvpn, Active Directory, dns, Dynamic update, Only secure updates, Only secure updates 29 সেপ্ট 2018 Subscribe. জাগো মা, জাগো মা দুর্গা পূজার গান শিল্পীঃ অরিজিৎ সিং জাগো মা, জাগো মা- 15 Sep 2017 1 / 17. [MS-GSSA-Diff] - v20170915.
DNS updates are sent to the AD server using Kerberos/GSSAPI for DNS (GSS-TSIG). This means that only secure connections need to be enabled.
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I know you guys are currently working through the GSS-TSIG portions but I think you're working towards doing the actual update afterwards. Be aware that Windows 2012, both the DNS server and clients, seem to be insanely picky about the compression used in both the TKEY/TSIG exchange as well as actual update. Best practice is to deploy DNS integrated with (AD) so it can avail itself of Microsoft security such as Kerberos and GSS-TSIG.
We are after all dealing with a linux emulation of a Microsoft process. I have a forest with multiple AD integrated DNS zones spread over several hundred DC's and about 50 Infolbox members sending updates. I troubleshoot something with GSS-TSIG every month or two.
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Would it be possible to add support for GSS-TSIG (RFC 3645)? This would make it possible to perform secure DNS updates to a Windows Active Directory environment, which AFAICT doesn't support normal TSIG updates. I figured maybe https://github.com/jcmturner/gokrb5 could be useful to do the Kerberos side of things.
To enable named to work with this support, is it that you need to specify the GSS key in the zone Server is running on Microsoft AD DNS with GSS-TSIG. In your case the "TSIG keyring" is not applicable.
isc bind 9には、spnego実装におけるバッファーオーバーフローの脆弱性（cve-2020-8625）があります。spnegoは、gss-tsigに基づく鍵交換で使用されるgss-apiにおいて認証メカニズムを提供しています。
জাগো মা, জাগো মা দুর্গা পূজার গান শিল্পীঃ অরিজিৎ সিং জাগো মা, জাগো মা- 15 Sep 2017 1 / 17. [MS-GSSA-Diff] - v20170915.
TSIG updates are a mechanism to transport zone updates over a secured mechanism. This feature is available for paid accounts (DynDNS Pro and Dyn Standard DNS) and can be used with nsupdate or with dhcpd. For more information on this mechanism, please see RFC 2845 and the Wikipedia page for TSIG.