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CVE-2017-12847

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root...

6.3 MediumFix available

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

0.79%Unchanged since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.3

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Record
CVE-2017-12847
CVSS 3.0
6.3 MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0
6.3 MediumAV:L/AC:M/Au:N/C:N/I:C/A:C
Weakness
CWE-665
Updated
2026-11-02
CVE List No score

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Record
CVE-2017-12847
Updated
2026-11-02
EUVDEUVD-2017-4384 No score

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Record
EUVD-2017-4384
Updated
2026-11-03
GitHub AdvisoriesGHSA-6j77-rprv-m39j 6.3

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root...

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Record
GHSA-6j77-rprv-m39j
CVSS 3.0
6.3 MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-665
Updated
2026-11-02
OSV 6.3

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Record
CVE-2017-12847
CVSS 3.0
6.3 MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2017-12847 6.3

Nagios Core before 4.3.3 creates a nagios.lock PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for nagios.lock modification before a root script executes a "kill cat /pathname/nagios.lock" command.

Record
UBUNTU-CVE-2017-12847
CVSS 3.0
6.3 MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVMGASA-2017-0437 No score

Updated nagios packages fix security vulnerability

It was found that nagios daemon creates its PID file after dropping privileges, which allows to change its content by non-root user with PID of any other process, resulting into denial-of-service when daemon is stopped (CVE-2017-12847).

Note that the nagios package on Mageia 5 is no longer supported. Users of this package should upgrade to Mageia 6.

Record
MGASA-2017-0437
Updated
2026-11-02
OSVopenSUSE-SU-2024:11073-1 No score

nagios-4.4.6-2.5 on GA media

These are all security issues fixed in the nagios-4.4.6-2.5 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11073-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
nagios
Mageia:6
before 4.3.1-2.1.mga6
4.3.1-2.1.mga6
nagios3
Ubuntu:16.04:LTS
All versions, plus listed versions
3.5.1-1ubuntu43.5.1.dfsg-2ubuntu13.5.1.dfsg-2ubuntu23.5.1.dfsg-2.1ubuntu13.5.1.dfsg-2.1ubuntu1.13.5.1.dfsg-2.1ubuntu1.23.5.1.dfsg-2.1ubuntu1.3
None known
nagios3
Ubuntu:18.04:LTS
All versions, plus listed versions
3.5.1.dfsg-2.1ubuntu8
None known
nagios
openSUSE:Tumbleweed
From an advisory covering 17 CVEs
before 4.4.6-2.5
4.4.6-2.5

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-12847 is a medium vulnerability (CVSS 6.3) in Nagios, published August 23, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.79%, the 56th percentile. Fixed in nagios 4.3.1-2.1.mga6.

References

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