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No exploitation reportedFix available

CVE-2020-6581

No exploitation reported by the sources we read.

  • Published2020-03-16

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Nagios NRPE 3.2.1 has Insufficient Filtering because, for example, nasty_metachars interprets \n as the character \ and the character n (not as the \n newline sequence). This can cause command injection.

Timeline

dates in UTC
  1. 2020-03-1618:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
32.x= 32no fix published
Nagios remote plug in executor
BranchAffectedFixed in
3.2= 3.2.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • nagios-nrpeUbuntu:18.04:LTSall versions · no fixed version listed
  • nagios-nrpeDebian:14all versions · fixed in 4.0.0-1
  • nagios-nrpeDebian:13all versions · fixed in 4.0.0-1
  • nagios-nrpeDebian:12all versions · fixed in 4.0.0-1
  • nrpeMageia:7all versions · fixed in 3.2.1-3.2.mga7
  • nrpeCleanStartall versions · fixed in 4.0.0-r0
  • nrpeAlpine:v3.24all versions · fixed in 4.0.0-r0
  • nrpeAlpine:v3.23all versions · fixed in 4.0.0-r0

9 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-6581 Red Hat Product Security

    nrpe: insufficient filtering and incorrect parsing of the configuration file may lead to command injection

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2020-6581 · 3 productsDisable nasty_metachars and dont_blame_nrpe option inside the NRPE configuration file - /etc/nagios/nrpe.cfg

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Published
2020-03-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-cvrp-qf9f-rq8m

Frequently asked questions

What is CVE-2020-6581?

Nagios NRPE 3.2.1 has Insufficient Filtering because, for example, nasty_metachars interprets \n as the character \ and the character n (not as the \n newline sequence). This can cause command injection.

Is CVE-2020-6581 actively exploited?

Active exploitation of CVE-2020-6581 has not been confirmed. Its EPSS score was 1.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-6581?

CVE-2020-6581 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record