CVE-2017-3142

An error in TSIG authentication can permit unauthorized zone transfers

Description

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 or accepting bogus NOTIFY packets. Affects BIND 9.4.0->9.8.8, 9.9.0->9.9.10-P1, 9.10.0->9.10.5-P1, 9.11.0->9.11.1-P1, 9.9.3-S1->9.9.10-S2, 9.10.5-S1->9.10.5-S2.

Remediation

Solution:

  • Upgrade to the patched release most closely related to your current version of BIND. These can all be downloaded from http://www.isc.org/downloads. BIND 9 version 9.9.10-P2 BIND 9 version 9.10.5-P2 BIND 9 version 9.11.1-P2 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.10-S3 BIND 9 version 9.10.5-S3

Workaround:

  • The effects of this vulnerability can be mitigated by using Access Control Lists (ACLs) that require both address range validation and use of TSIG authentication in conjunction. For information on how to configure this type of compound authentication control, please see: https://kb.isc.org/article/AA-00723/0/Using-Access-Control-Lists-ACLs-with-both-addresses-and-keys.html. (Note that this technique may not be effective against bogus NOTIFY packets if an attacker is able to reach the target DNS server whilst using a spoofed sending address).

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 2.63% Top 20%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2017:1680 third party advisory vendor advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03772en_us third party advisory
https://access.redhat.com/errata/RHSA-2017:1679 third party advisory vendor advisory
http://www.securityfocus.com/bid/99339 third party advisory vdb entry
http://www.securitytracker.com/id/1038809 third party advisory vdb entry
https://www.debian.org/security/2017/dsa-3904 third party advisory vendor advisory
https://kb.isc.org/docs/aa-01504 vendor advisory
https://security.netapp.com/advisory/ntap-20190830-0003/

Frequently Asked Questions

What is the severity of CVE-2017-3142?
CVE-2017-3142 has been scored as a medium severity vulnerability.
How to fix CVE-2017-3142?
To fix CVE-2017-3142: Upgrade to the patched release most closely related to your current version of BIND. These can all be downloaded from http://www.isc.org/downloads. BIND 9 version 9.9.10-P2 BIND 9 version 9.10.5-P2 BIND 9 version 9.11.1-P2 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.10-S3 BIND 9 version 9.10.5-S3
Is CVE-2017-3142 being actively exploited in the wild?
It is possible that CVE-2017-3142 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3142?
CVE-2017-3142 affects ISC BIND 9.
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