CVE-2016-6170
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 40.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 40.94% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- isc/bind · redhat/enterprise linux
- Source
- secalert@redhat.com
EPSS 40.9% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2016/07/06/3Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/91611Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036241Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1353563Issue Tracking, Patch, Third Party Advisory
- https://github.com/sischkg/xfer-limit/blob/master/README.mdExploit, Patch, Third Party Advisory
- https://kb.isc.org/article/AA-01390Vendor Advisory
- https://kb.isc.org/article/AA-01390/169/CVE-2016-6170Vendor Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.htmlMailing List, Third Party Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015073.htmlMailing List, Third Party Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015075.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201610-07Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/07/06/3Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/91611Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036241Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1353563Issue Tracking, Patch, Third Party Advisory
- https://github.com/sischkg/xfer-limit/blob/master/README.mdExploit, Patch, Third Party Advisory
- https://kb.isc.org/article/AA-01390Vendor Advisory
- https://kb.isc.org/article/AA-01390/169/CVE-2016-6170Vendor Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.htmlMailing List, Third Party Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015073.htmlMailing List, Third Party Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015075.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201610-07Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.