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CVE Record

CVE-2021-20001: It was discovered, that debian-edu-config, a set of configuration files used for the Debian Edu blend, befo...

It was discovered, that debian-edu-config, a set of configuration files used for the Debian Edu blend, before 2.12.16 configured insecure permissions for the user web shares (~/public_html), which could result in privilege escalation.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Debian Edu systems may have created user web-share directories with permissions that were too open. On affected systems, this could let a user move beyond their intended access and escalate privileges. The issue is fixed in debian-edu-config 2.12.16, according to the source bundle.

Executive priority

Treat this as a targeted Linux configuration issue with moderate urgency. It is not marked as actively exploited, but privilege escalation can materially worsen compromise impact in shared educational environments.

Technical view

CVE-2021-20001 affects debian-edu-config before 2.12.16. The vulnerable configuration set insecure permissions for user web shares, specifically ~/public_html. Debian describes the impact as possible privilege escalation. The bundle provides no CVSS score, CWE, CPE, exploit details, or exact prerequisite conditions.

Likely exposure

Exposure is most likely in Debian Edu environments running debian-edu-config earlier than 2.12.16, especially where user web shares are enabled. Package inventory is required because the source bundle does not provide CPEs or a complete deployment matrix.

Exploitation context

The source bundle does not show active exploitation. The CVE is not listed as KEV, and the cited Debian materials describe a security update rather than exploitation in the wild.

Researcher notes

Key unknowns are prerequisite access level, exact permission mode, and affected Debian release coverage beyond package version. Review the Debian commit and advisories for implementation detail; avoid assuming broader Debian exposure without inventory evidence.

Mitigation direction

  • Upgrade debian-edu-config to 2.12.16 or later where available.
  • Apply Debian DSA-5072-1 or DLA-2918-1 updates as applicable.
  • Check Debian guidance for unsupported or older Debian Edu deployments.
  • Review permissions on user ~/public_html web shares after updating.

Validation and detection

  • Inventory systems for the installed debian-edu-config package version.
  • Confirm affected hosts are no longer running versions before 2.12.16.
  • Identify Debian Edu systems with user web shares enabled.
  • Verify ~/public_html permissions align with the updated Debian configuration.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-20001 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Debiandebian-edu-config< 2.12.16Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.