Vulnerability Report

CVE-2016-9566

Title: Nagios

Other

Proof Of Concept

PoC Available for CVE-2016-9566

CWE Category CWE-59

Published Date Dec 15, 2016

Modified Date Jun 17, 2026

Exploit Status Available

Score 7.8 CVSS v3.0

Exploit Probability (EPSS)

4.88%

Vulnerability Summary

CVE-2016-9566: base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file. NOTE: this can be leveraged by remote attackers using CVE-2016-9565.

Impacted Vendors

nagios 1

Reference Links

http://rhn.redhat.com/errata/RHSA-2017-0211.html http://rhn.redhat.com/errata/RHSA-2017-0212.html http://rhn.redhat.com/errata/RHSA-2017-0213.html http://rhn.redhat.com/errata/RHSA-2017-0214.html http://rhn.redhat.com/errata/RHSA-2017-0258.html http://rhn.redhat.com/errata/RHSA-2017-0259.html http://seclists.org/fulldisclosure/2016/Dec/58 http://www.securityfocus.com/bid/94919 http://www.securitytracker.com/id/1037487 https://bugzilla.redhat.com/show_bug.cgi?id=1402869 https://github.com/NagiosEnterprises/nagioscore/commit/c29557dec91eba2306f5fb11b8da4474ba63f8c4 https://legalhackers.com/advisories/Nagios-Exploit-Root-PrivEsc-CVE-2016-9566.html https://lists.debian.org/debian-lts-announce/2018/12/msg00014.html https://security.gentoo.org/glsa/201612-51 https://security.gentoo.org/glsa/201702-26 https://security.gentoo.org/glsa/201710-20 https://www.exploit-db.com/exploits/40921/ https://www.nagios.org/projects/nagios-core/history/4x/ http://rhn.redhat.com/errata/RHSA-2017-0211.html http://rhn.redhat.com/errata/RHSA-2017-0212.html http://rhn.redhat.com/errata/RHSA-2017-0213.html http://rhn.redhat.com/errata/RHSA-2017-0214.html http://rhn.redhat.com/errata/RHSA-2017-0258.html http://rhn.redhat.com/errata/RHSA-2017-0259.html http://seclists.org/fulldisclosure/2016/Dec/58 http://www.securityfocus.com/bid/94919 http://www.securitytracker.com/id/1037487 https://bugzilla.redhat.com/show_bug.cgi?id=1402869 https://github.com/NagiosEnterprises/nagioscore/commit/c29557dec91eba2306f5fb11b8da4474ba63f8c4 https://legalhackers.com/advisories/Nagios-Exploit-Root-PrivEsc-CVE-2016-9566.html https://lists.debian.org/debian-lts-announce/2018/12/msg00014.html https://security.gentoo.org/glsa/201612-51 https://security.gentoo.org/glsa/201702-26 https://security.gentoo.org/glsa/201710-20 https://www.exploit-db.com/exploits/40921/ https://www.nagios.org/projects/nagios-core/history/4x/

CVSS v3.0

Source Entity [email protected]

Severity HIGH

7.8

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.2

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-9566 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/40921

View Code

June 17, 2026 MODIFIED

Vulnerability data updated via NVD.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

December 15, 2016 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.