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

published 2019-01-16 7 y ago modified 2026-06-17 4 mo ago also EUVD-2017-12281

cvss: 3.7; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 12.2%; EPSS 12.2% chance of exploitation in 30 days, percentile 96%
public exploits: 0; none known

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.

Patch / fix

distros 2

alpine arch linux

bind Alpine 3.7, Alpine 3.6 9.11.3-r0

alpine advisories ALPINE-CVE-2017-3140

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

bind Arch Linux 9.11.1.P1-1

arch linux advisories AVG-301

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-3140 updated 2026-11-05 cvss 3.7

bind: Error processing RPZ rules leads to endless loop while handling query

Red Hat Enterprise Linux 5 bind, bind97 Red Hat Enterprise Linux 6 bind, bind-sdb, bind-libs, bind-utils, bind-chroot Red Hat Enterprise Linux 7 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +6 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

12.18% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	3.7	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.0	5.9	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

ISC BIND 9

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

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

Sources

CVE List CVE-2017-3140
NVD CVE-2017-3140

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary