bind: Improper restriction of zone size limit
Published Jul 6, 2016
6.5
MEDIUMCVSS 3.1
EPSS 40.94%
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.
Affected products
No data.
Configuration 1
- ≥ 9.0 · ≤ 9.9.8
- ≥ 9.10.0 · ≤ 9.10.3
- 9.9.9
- 9.9.9
- 9.9.9
- 9.9.9
- 9.10.4
- 9.10.4
- 9.11.0
- 9.11.0
- 9.11.0
- 9.11.0
Configuration 2
- 5.0
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 5
bind
Will not fix
Red Hat Enterprise Linux 5
bind97
Will not fix
Red Hat Enterprise Linux 6
bind
Will not fix
Red Hat Enterprise Linux 7
bind
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | bind | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | bind97 | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | bind | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | bind | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Red Hat mitigation
This issue can be mitigated by disallowing zone transfers and dynamic updates from potentially malicious sources. For more information, see the "Workarounds" section on https://kb.isc.org/article/AA-01390 page.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 40.94% (0.40937) | 98.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 40.54% (0.40536) | 98.47th | v5 (v2026.06.15) |
| Mar 4, 2026 | 13.02% (0.13020) | 93.95th | v4 (v2025.03.14) |
| Mar 1, 2026 | 5.13% (0.05126) | 89.71th | v4 (v2025.03.14) |
| Feb 4, 2026 | 13.02% (0.13020) | 93.90th | v4 (v2025.03.14) |
| Feb 1, 2026 | 5.13% (0.05126) | 89.64th | v4 (v2025.03.14) |
| Jan 4, 2026 | 13.02% (0.13020) | 93.85th | v4 (v2025.03.14) |
| Jan 1, 2026 | 5.13% (0.05126) | 89.58th | v4 (v2025.03.14) |
| Dec 4, 2025 | 13.02% (0.13020) | 93.81th | v4 (v2025.03.14) |
| Dec 1, 2025 | 4.70% (0.04697) | 89.00th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.86% (0.01860) | 81.43th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.99% (0.02994) | 77.56th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.86% (0.01860) | 81.85th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.02% (0.01023) | 84.48th | v3 (v2023.03.01) |
| May 15, 2024 | 1.02% (0.01023) | 83.70th | v3 (v2023.03.01) |
| Jun 9, 2023 | 1.02% (0.01023) | 81.70th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.44% (0.01445) | 84.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.95% (0.03953) | 85.90th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.95% (0.03953) | 84.46th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.95% (0.03953) | 67.72th | v2 (v2022.01.01) |
References (14)
- http://www.openwall.com/lists/oss-security/2016/07/06/3 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/91611 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1036241 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-6170 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1353563 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/sischkg/xfer-limit/blob/master/README.md x_refsource_MISCExploitPatchThird Party Advisory
- https://kb.isc.org/article/AA-01390 x_refsource_CONFIRMVendor Advisory
- https://kb.isc.org/article/AA-01390/169/CVE-2016-6170 x_refsource_CONFIRMVendor Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015073.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015075.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-6170
- https://security.gentoo.org/glsa/201610-07 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-6170
Change history (0)
No recorded changes yet.