CVE-2020-6581

Publication date 16 March 2020

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
nagios-nrpe	26.04 LTS resolute	Not affected
	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

leosilva

fix in the commit link are the part for proper processing of nasty_metachars

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
nagios-nrpe	Upstream: 0db3454

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.3 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	Required
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.3 · High
Exploitability score	-
Impact score	-

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