nginx: Insufficient limits of CNAME resolution in resolver
Published Feb 15, 2016
5.3
MEDIUMCVSS 3.1
EPSS 8.66%
Description
The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.
Affected products
No data.
Configuration 1
Configuration 2
- 14.04
- 15.10
Configuration 3
- 7.0
- 8.0
- 9.0
- 42.1
No data.
Red Hat Software Collections for Red Hat Enterprise Linux 6
rh-nginx18-nginx-1:1.8.1-1.el6
Fixed · RHSA-2016:1425
Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
rh-nginx18-nginx-1:1.8.1-1.el6
Fixed · RHSA-2016:1425
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
rh-nginx18-nginx-1:1.8.1-1.el6
Fixed · RHSA-2016:1425
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-nginx18-nginx-1:1.8.1-1.el7
Fixed · RHSA-2016:1425
Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS
rh-nginx18-nginx-1:1.8.1-1.el7
Fixed · RHSA-2016:1425
Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
rh-nginx18-nginx-1:1.8.1-1.el7
Fixed · RHSA-2016:1425
Red Hat Software Collections
nginx16-nginx
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | rh-nginx18-nginx-1:1.8.1-1.el6 | Fixed | RHSA-2016:1425 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS | rh-nginx18-nginx-1:1.8.1-1.el6 | Fixed | RHSA-2016:1425 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS | rh-nginx18-nginx-1:1.8.1-1.el6 | Fixed | RHSA-2016:1425 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-nginx18-nginx-1:1.8.1-1.el7 | Fixed | RHSA-2016:1425 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS | rh-nginx18-nginx-1:1.8.1-1.el7 | Fixed | RHSA-2016:1425 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS | rh-nginx18-nginx-1:1.8.1-1.el7 | Fixed | RHSA-2016:1425 |
| Red Hat Software Collections | nginx16-nginx | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/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 (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.66% (0.08664) | 94.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.43% (0.08433) | 94.28th | v5 (v2026.06.15) |
| Apr 29, 2026 | 20.02% (0.20023) | 95.49th | v4 (v2025.03.14) |
| Dec 28, 2025 | 33.18% (0.33182) | 96.74th | v4 (v2025.03.14) |
| Dec 27, 2025 | 26.23% (0.26233) | 96.15th | v4 (v2025.03.14) |
| Nov 19, 2025 | 33.18% (0.33182) | 96.67th | v4 (v2025.03.14) |
| Oct 28, 2025 | 35.50% (0.35500) | 96.86th | v4 (v2025.03.14) |
| Oct 27, 2025 | 28.32% (0.28318) | 96.29th | v4 (v2025.03.14) |
| Oct 1, 2025 | 36.31% (0.36312) | 97.00th | v4 (v2025.03.14) |
| Sep 9, 2025 | 28.32% (0.28318) | 96.34th | v4 (v2025.03.14) |
| Sep 4, 2025 | 21.44% (0.21441) | 95.50th | v4 (v2025.03.14) |
| Sep 1, 2025 | 16.20% (0.16201) | 94.60th | v4 (v2025.03.14) |
| Aug 4, 2025 | 21.44% (0.21441) | 95.46th | v4 (v2025.03.14) |
| Aug 1, 2025 | 16.20% (0.16201) | 94.59th | v4 (v2025.03.14) |
| Jul 30, 2025 | 21.44% (0.21441) | 95.45th | v4 (v2025.03.14) |
| Mar 30, 2025 | 27.70% (0.27700) | 96.02th | v4 (v2025.03.14) |
| Mar 29, 2025 | 33.63% (0.33634) | 95.23th | v4 (v2025.03.14) |
| Mar 19, 2025 | 27.70% (0.27700) | 95.83th | v4 (v2025.03.14) |
| Mar 17, 2025 | 35.35% (0.35347) | 96.68th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.06% (0.01062) | 84.79th | v3 (v2023.03.01) |
| Apr 10, 2024 | 1.06% (0.01062) | 83.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.06% (0.01062) | 81.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (15)
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00042.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2016/000169.html
- http://mailman.nginx.org/pipermail/nginx/2016-January/049700.html mailing-listx_refsource_MLISTVendor Advisory
- http://seclists.org/fulldisclosure/2021/Sep/36 mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
- http://www.debian.org/security/2016/dsa-3473 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.securitytracker.com/id/1034869 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2892-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/errata/RHSA-2016:1425 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-0747 Vendor Advisory
- https://bto.bluecoat.com/security-advisory/sa115 x_refsource_CONFIRMThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1302589 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-0747
- https://security.gentoo.org/glsa/201606-06 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://support.apple.com/kb/HT212818 x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-0747
Change history (0)
No recorded changes yet.