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Incorrect AuthorizationWeakness · CWE-863

CVE-2024-48651

HIGH · 7.5 CVSS v3.1 Published 2024-11-29
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In ProFTPD through 1.3.8b before cec01cc, supplemental group inheritance grants unintended access to GID 0 because of the lack of supplemental groups from mod_sql.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-863

An authorization check exists but is flawed, so it passes when it should fail. Attackers probe roles and object references to find the gap. Remediation means centralising and correctly implementing the access-control logic, then testing it against every role.

General guidance for the incorrect authorization class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

ProFTPD 1.3.9 or later (contains commit cec01cc fixing the supplemental group inheritance issue)

  1. 1. Check current ProFTPD version using: proftpd -v or dpkg -l | grep proftpd
  2. 2. Back up current ProFTPD configuration directory (/etc/proftpd/ or /etc/proftpd.conf)
  3. 3. Stop the ProFTPD service: systemctl stop proftpd or service proftpd stop
  4. 4. Upgrade ProFTPD package using your distribution's package manager (e.g., apt update && apt install proftpd on Debian/Ubuntu, or yum update proftpd on RHEL/CentOS)
  5. 5. Verify the installed version is 1.3.9 or later which contains the fix at commit cec01cc
  6. 6. Review the configuration for any deprecated directives after upgrade
  7. 7. Start ProFTPD service: systemctl start proftpd or service proftpd start
  8. 8. Test FTP functionality and verify proper authentication behavior
Caveat Review release notes for 1.3.9 for any configuration directive changes or deprecated features compared to 1.3.8b

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-48651 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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