Security readout for executives and security teams
Plain-English summary
CVE-2017-6188 affects Munin before 2.999.6 when CGI graphing is enabled. A crafted web request can cause files writable by the web server user to be overwritten. This can disrupt monitoring and may support further compromise depending on local permissions.
Executive priority
Treat this as a priority fix for internet-facing or broadly reachable Munin instances. Internal-only deployments still need remediation because arbitrary file overwrite can affect monitoring integrity and system stability.
Technical view
The issue is an arbitrary local file write in Munin CGI graph handling. The CVE states that multiple upper_limit GET parameters can overwrite any file accessible to the www-data user. The sources name Munin versions before 2.999.6 and vendor advisories from Debian and Gentoo.
Likely exposure
Exposure is most likely on Munin deployments before 2.999.6 that have CGI graphs enabled, especially if the Munin web interface is reachable beyond trusted administrators.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Public references describe the vulnerable condition, but the bundle does not provide CVSS, authentication requirements, or exploit-in-the-wild evidence.
Researcher notes
Key unknowns remain: CVSS is absent, affected package ranges are not enumerated beyond before 2.999.6, and the bundle does not establish active exploitation. Focus assessment on CGI graph exposure and www-data write impact.
Mitigation direction
- Upgrade Munin to 2.999.6 or a vendor-fixed package.
- Apply Debian DSA-3794 or Gentoo GLSA-201710-05 guidance where applicable.
- Disable CGI graphs until the system is patched.
- Restrict Munin web access to trusted networks and administrators.
- Review files writable by the web server user.
Validation and detection
- Inventory Munin versions across monitored environments.
- Confirm whether CGI graph generation is enabled.
- Check installed package changelogs against Debian or Gentoo advisories.
- Review web server permissions for the www-data user.
- Look for unexpected file changes owned or writable by www-data.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2017-6188 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.debian.org/855705CVE reference · x_refsource_CONFIRM
- DSA-3794CVE reference · vendor-advisory, x_refsource_DEBIAN
- GLSA-201710-05CVE reference · vendor-advisory, x_refsource_GENTOO
- https://github.com/munin-monitoring/munin/issues/721CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.