CVE-2017-3140

An error processing RPZ rules can cause named to loop endlessly after handling a query

Description

If named is configured to use Response Policy Zones (RPZ) an error processing some rule types can lead to a condition where BIND will endlessly loop while handling a query. Affects BIND 9.9.10, 9.10.5, 9.11.0->9.11.1, 9.9.10-S1, 9.10.5-S1.

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-P1 BIND 9 version 9.10.5-P1 BIND 9 version 9.11.1-P1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.10-S2 BIND 9 version 9.10.5-S2

Workaround:

  • Only the NSDNAME and NSIP RPZ rule types can cause this condition to occur. You can work around this vulnerability if you are able to express your desired policy while avoiding NSDNAME or NSIP rules, otherwise it is advised that you upgrade to a version which corrects the defect.

Category

3.7
CVSS
Severity: Low
CVSS 3.0 •
CVSS 2.0 •
EPSS 20.40% Top 5%
Vendor Advisory gentoo.org Vendor Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1038692 vdb entry third party advisory
https://security.gentoo.org/glsa/201708-01 third party advisory vendor advisory
http://www.securityfocus.com/bid/99088 vdb entry third party advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03772en_us third party advisory
https://security.netapp.com/advisory/ntap-20180926-0001/ third party advisory
https://kb.isc.org/docs/aa-01495 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-3140?
CVE-2017-3140 has been scored as a low severity vulnerability.
How to fix CVE-2017-3140?
To fix CVE-2017-3140: 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-P1 BIND 9 version 9.10.5-P1 BIND 9 version 9.11.1-P1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.10-S2 BIND 9 version 9.10.5-S2
Is CVE-2017-3140 being actively exploited in the wild?
It is possible that CVE-2017-3140 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~20% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3140?
CVE-2017-3140 affects ISC BIND 9.
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