nginx: Local privilege escalation via log files
Published Nov 29, 2016
7.8
HIGHCVSS 3.1
EPSS 4.86%
Description
The nginx package before 1.6.2-5+deb8u3 on Debian jessie, the nginx packages before 1.4.6-1ubuntu3.6 on Ubuntu 14.04 LTS, before 1.10.0-0ubuntu0.16.04.3 on Ubuntu 16.04 LTS, and before 1.10.1-0ubuntu1.1 on Ubuntu 16.10, and the nginx ebuild before 1.10.2-r3 on Gentoo allow local users with access to the web server user account to gain root privileges via a symlink attack on the error log.
Affected products
No data.
Configuration 1
Running on/with
- 16.10
Configuration 2
Running on/with
- 16.04
Configuration 3
Running on/with
- 8.0
Configuration 4
Running on/with
- 14.04
Configuration 5
- 33
- 34
- 35
No data.
Red Hat Enterprise Linux 9
nginx
Affected
Red Hat Software Collections
nginx16-nginx
Will not fix
Red Hat Software Collections
rh-nginx18-nginx
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | nginx | Affected | n/a |
| Red Hat Software Collections | nginx16-nginx | Will not fix | n/a |
| Red Hat Software Collections | rh-nginx18-nginx | 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/.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:C/I:C/A:C
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 (40 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.86% (0.04863) | 91.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.86% (0.04863) | 90.88th | v5 (v2026.06.15) |
| Jun 14, 2026 | 11.25% (0.11248) | 93.71th | v4 (v2025.03.14) |
| Apr 1, 2026 | 9.83% (0.09830) | 92.95th | v4 (v2025.03.14) |
| Mar 4, 2026 | 8.59% (0.08594) | 92.26th | v4 (v2025.03.14) |
| Mar 1, 2026 | 7.31% (0.07305) | 91.56th | v4 (v2025.03.14) |
| Feb 4, 2026 | 8.81% (0.08807) | 92.31th | v4 (v2025.03.14) |
| Feb 1, 2026 | 7.49% (0.07490) | 91.60th | v4 (v2025.03.14) |
| Jan 4, 2026 | 8.59% (0.08594) | 92.14th | v4 (v2025.03.14) |
| Jan 1, 2026 | 7.31% (0.07305) | 91.44th | v4 (v2025.03.14) |
| Dec 4, 2025 | 8.59% (0.08594) | 92.08th | v4 (v2025.03.14) |
| Dec 1, 2025 | 7.31% (0.07305) | 91.36th | v4 (v2025.03.14) |
| Nov 4, 2025 | 8.71% (0.08708) | 92.10th | v4 (v2025.03.14) |
| Nov 1, 2025 | 7.60% (0.07599) | 91.45th | v4 (v2025.03.14) |
| Oct 12, 2025 | 8.71% (0.08708) | 92.05th | v4 (v2025.03.14) |
| Oct 4, 2025 | 9.86% (0.09859) | 92.70th | v4 (v2025.03.14) |
| Oct 1, 2025 | 7.39% (0.07386) | 91.39th | v4 (v2025.03.14) |
| Sep 20, 2025 | 10.64% (0.10643) | 93.02th | v4 (v2025.03.14) |
| Sep 9, 2025 | 9.41% (0.09412) | 92.49th | v4 (v2025.03.14) |
| Sep 4, 2025 | 11.62% (0.11617) | 93.42th | v4 (v2025.03.14) |
| Sep 1, 2025 | 8.73% (0.08730) | 92.20th | v4 (v2025.03.14) |
| Aug 20, 2025 | 11.62% (0.11617) | 93.38th | v4 (v2025.03.14) |
| Aug 4, 2025 | 15.42% (0.15415) | 94.36th | v4 (v2025.03.14) |
| Aug 1, 2025 | 11.74% (0.11740) | 93.46th | v4 (v2025.03.14) |
| Jul 30, 2025 | 15.42% (0.15415) | 94.35th | v4 (v2025.03.14) |
| Jul 4, 2025 | 10.85% (0.10847) | 93.05th | v4 (v2025.03.14) |
| Jul 1, 2025 | 8.72% (0.08721) | 92.10th | v4 (v2025.03.14) |
| Jun 4, 2025 | 10.85% (0.10847) | 92.99th | v4 (v2025.03.14) |
| Jun 1, 2025 | 8.72% (0.08721) | 92.06th | v4 (v2025.03.14) |
| May 4, 2025 | 10.85% (0.10847) | 92.96th | v4 (v2025.03.14) |
| May 1, 2025 | 8.72% (0.08721) | 92.04th | v4 (v2025.03.14) |
| Mar 30, 2025 | 10.85% (0.10847) | 92.73th | v4 (v2025.03.14) |
| Mar 29, 2025 | 25.01% (0.25013) | 93.81th | v4 (v2025.03.14) |
| Mar 17, 2025 | 10.85% (0.10847) | 92.84th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.09% (0.00092) | 41.14th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.09% (0.00092) | 39.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00054) | 19.79th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.03% (0.05028) | 89.54th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.03% (0.05028) | 88.48th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.03% (0.05028) | 75.01th | v2 (v2022.01.01) |
References (19)
- http://packetstormsecurity.com/files/139750/Nginx-Debian-Based-Distros-Root-Privilege-Escalation.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2016/Nov/78 mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2017/Jan/33 mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
- http://www.debian.org/security/2016/dsa-3701 vendor-advisoryx_refsource_DEBIANVendor Advisory
- http://www.securityfocus.com/archive/1/539796/100/0/threaded mailing-listx_refsource_BUGTRAQThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/93903 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037104 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-3114-1 vendor-advisoryx_refsource_UBUNTUVendor Advisory
- https://access.redhat.com/security/cve/CVE-2016-1247 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1390182 Issue Tracking
- https://legalhackers.com/advisories/Nginx-Exploit-Deb-Root-PrivEsc-CVE-2016-1247.html x_refsource_MISCExploitThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBIZEKHBOCKO7FUMCO4X53ENMWU5OYFX/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ESTIADC7BDB6VTH4JAP6C6OCW2CQ4NHP/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3WOO7E5R2HT5XVOIOFPEFALILVOWZUF/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2016-1247
- https://security.gentoo.org/glsa/201701-22 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-1247
- https://www.exploit-db.com/exploits/40768/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
- https://www.youtube.com/watch?v=aTswN1k1fQs x_refsource_MISCExploitThird Party Advisory
Change history (0)
No recorded changes yet.