CVE-2017-3143

Impact:
Important
Public Date:
2017-06-29
CWE:
CWE-592
Bugzilla:
1466193: CVE-2017-3143 bind: An error in TSIG authentication can permit unauthorized dynamic updates
A flaw was found in the way BIND handled TSIG authentication for dynamic updates. A remote attacker able to communicate with an authoritative BIND server could use this flaw to manipulate the contents of a zone, by forging a valid TSIG or SIG(0) signature for a dynamic update request.

Find out more about CVE-2017-3143 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact High
Availability Impact None

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (bind) RHSA-2017:1680 2017-07-05
Red Hat Enterprise Linux 6 (bind) RHSA-2017:1679 2017-07-05

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 bind97 Will not fix
Red Hat Enterprise Linux 5 bind Not affected

Acknowledgements

Red Hat would like to thank Internet Systems Consortium for reporting this issue. Upstream acknowledges Clement Berthaux (Synacktiv) as the original reporter.

Mitigation

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 parallel. 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

External References

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