CVE-2020-14004Public exploit

Local file permission changes via followed symlink

Published Jun 12, 2020 · Updated Aug 4, 2024

Symlink following in prepare-dirs in Icinga 2 before 2.12.0-rc1 allows local users to change arbitrary files to mode 2750. The root-run script applies chmod to /run/icinga2/cmd without rejecting a symlink, causing it to follow an icinga-controlled link to another filesystem object. Control of the icinga account and a service restart are required; the resulting mode changes can deny non-root users access to vital files or directories.

CVSS severity7.8
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Symlink following in prepare-dirs in Icinga 2 before 2.12.0-rc1 allows local users to change arbitrary files to mode 2750. The root-run script applies chmod to /run/icinga2/cmd without rejecting a symlink, causing it to follow an icinga-controlled link to another filesystem object. Control of the icinga account and a service restart are required; the resulting mode changes can deny non-root users access to vital files or directories.

The record

CVE
CVE-2020-14004
Published
Jun 12, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-59, T1222.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1222.002Linux and Mac File and Directory Permissions Modification

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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