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    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.

    Published:Dec 7, 2016
    Last Modified:Apr 12, 2025
    EPS:Dec 15, 2016
    EPSS Score:0.1197
    CVSS Score:7.8

    Affected Products

    Vendor
    Nagios
    Product
    Nagios
    Vendor
    Redhat
    Product
    Openstack
    Vendor
    Redhat
    Product
    Storage

    Exploits

    https://legalhackers.com/advisories/Nagios-Exploit-Root-PrivEsc-CVE-2016-9566.htmlhttps://legalhackers.com/advisories/Nagios-Exploit-Root-PrivEsc-CVE-2016-9566.htmlhttps://www.exploit-db.com/exploits/40921

    Related CVEs

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    CVE-2025-56432 (CVSS 6.1) — A cross-site scripting (XSS) vulnerability exists in Nagios XI 2024R2. The vulnerability allows remote attacke…
    CVE-2012-10029 (CVSS 8.6) — Nagios XI Network Monitor prior to Graph Explorer component version 1.3 contains a command injection vulnerabi…
    CVE-2020-13977 (CVSS 4.9) — Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" confi…
    CVE-2020-6584 (CVSS 6.5) — Nagios Log Server 2.1.3 has Incorrect Access Control.…
    CVE-2020-6585 (CVSS 8.8) — Nagios Log Server 2.1.3 has CSRF.…
    CVE-2020-6586 (CVSS 5.4) — Nagios Log Server 2.1.3 allows XSS by visiting /profile and entering a crafted name field that is mishandled o…
    CVE-2019-3698 (CVSS 5.7) — UNIX Symbolic Link (Symlink) Following vulnerability in the cronjob shipped with nagios of SUSE Linux Enterpri…
    CVE-2018-13441 (CVSS 5.5) — qh_help in Nagios Core version 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which a…
    CVE-2017-12847 (CVSS 6.3) — Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which…

    References

    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/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High