CVE-2023-22551Public exploitNetwork attack vector

Remote service interruption via connection memory leaks

Published Jan 1, 2023 · Updated Apr 7, 2025

Memory exhaustion in rovinbhandari FTP through 96c1a35 allows remote attackers to interrupt service through repeated client connections. The server accept loop allocates client_info, and serve_client allocates a packet buffer, but neither allocation is freed after disconnection. Unauthenticated clients need only connect and terminate repeatedly; each cycle leaks 520 bytes until memory pressure interrupts service.

CVSS severity7.5
High
EPSS probability1.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in rovinbhandari FTP through 96c1a35 allows remote attackers to interrupt service through repeated client connections. The server accept loop allocates client_info, and serve_client allocates a packet buffer, but neither allocation is freed after disconnection. Unauthenticated clients need only connect and terminate repeatedly; each cycle leaks 520 bytes until memory pressure interrupts service.

The record

CVE
CVE-2023-22551
Published
Jan 1, 2023
Updated
Apr 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2025Record 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

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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