CVE-2024-1017Public exploitNetwork attack vector

Unauthenticated service crash via oversized USERNAME

Published Jan 29, 2024 · Updated Aug 23, 2024

Denial of service in Gabriels FTP Server 1.2 allows remote attackers to crash the FTP service with an oversized USERNAME value. The FTP login handler accepts a USER command whose USERNAME field contains more bytes than the server can process and terminates while handling the value. No credentials or user interaction are required; network access to the FTP control service is enough to interrupt file transfers for all users.

CVSS severity5.3
Medium
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Gabriels FTP Server 1.2 allows remote attackers to crash the FTP service with an oversized USERNAME value. The FTP login handler accepts a USER command whose USERNAME field contains more bytes than the server can process and terminates while handling the value. No credentials or user interaction are required; network access to the FTP control service is enough to interrupt file transfers for all users.

The record

CVE
CVE-2024-1017
Published
Jan 29, 2024
Updated
Aug 23, 2024
Vendor
gabmuf
Product
Open&Compact FTP Server
Classifications
CWE-404, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

gabmuf · Open&Compact FTP Serverversion=1.2
Gabriels · FTP Serverversion=1.2

Published CVSS scores

5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

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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