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Fencer Vulns
medium 6.5

CVE-2016-6170 json

ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (s…

published 2016-07-06 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-7104

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
40.9%
EPSS 40.9% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.

Patch / fix

  • bind9 Debian 14, Debian 13, Debian 12 1:9.10.6+dfsg-1

debian advisories DEBIAN-CVE-2016-6170

  • bind9 Ubuntu Pro 16.04 LTS 1:9.10.3.dfsg.P4-8ubuntu1.19+esm5

ubuntu advisories UBUNTU-CVE-2016-6170

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +6 more 9.9.6P1-0.44.1
  • bind SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +6 more 9.9.9P1-59.1
  • bind SLES for SAP 12, SLES 12-LTSS 9.9.9P1-28.34.1

suse advisories SUSE-SU-2017:1000-1SUSE-SU-2017:0998-1SUSE-SU-2017:0999-1

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-2016-6170 updated cvss 6.5

bind: Improper restriction of zone size limit

  • 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
    affected: workaround, no fix planned “Will not fix”

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

40.94% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/sischkg/xfer-limit/blob/master/README.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

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.