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CVE-2016-1247

35
FAUCET Score

CVE-2016-1247 describes a local privilege escalation vulnerability affecting Nginx packages on Debian, Ubuntu, and Gentoo distributions. A local user with access to the web server account can exploit a symlink attack on the error log to gain root privileges. This vulnerability has a CVSS score of 7.8 (High), indicating a significant risk with low attack complexity and high impact on confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, public exploit code (EDB-40768) exists, and the vulnerability has garnered notable community discussion, suggesting awareness and potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.10.1CPE matchmatch criteria
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
<= 1.10.0CPE matchmatch criteria
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
<= 1.6.2CPE matchmatch criteria
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
<= 1.4.3CPE matchmatch criteria
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.86%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-40768 · Nov 16, 2016
This CVE's current EPSS score of 0.0486 is in the 98th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (5)

debianvendor investigatingvia nvd_reference
View patch
ubuntuvendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nginx
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: nginx16-nginx
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-nginx18-nginx

Vendor Advisories (1)

redhatCVE-2016-1247Low

nginx: Local privilege escalation via log files

Oct 25, 2016

References

packetstormsecurity.com / files/139750/Nginx-Debian-Based-Distros-Root-Privilege-Escalation.html
ExploitThird Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2016/Nov/78
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2017/Jan/33
Mailing ListThird Party Advisory
legalhackers.com / advisories/Nginx-Exploit-Deb-Root-PrivEsc-CVE-2016-1247.html
ExploitThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/CBIZEKHBOCKO7FUMCO4X53ENMWU5OYFX
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ESTIADC7BDB6VTH4JAP6C6OCW2CQ4NHP
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/P3WOO7E5R2HT5XVOIOFPEFALILVOWZUF
security.gentoo.org / glsa/201701-22
Third Party Advisory
exploit-db.com / exploits/40768
ExploitThird Party AdvisoryVDB Entry
youtube.com / watch
ExploitThird Party Advisory
debian.org / security/2016/dsa-3701
Vendor Advisory
securityfocus.com / archive/1/539796/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/93903
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037104
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-3114-1
Vendor Advisory