CVE-2024-34488Public exploitNetwork attack vector

Controller hang via zero-length multipart reply

Published May 5, 2024 · Updated Aug 2, 2024

Infinite-loop denial of service in Faucet SDN Ryu 4.34 allows remote attackers to hang the controller with a crafted OpenFlow reply. OFPMultipartReply.parser in ryu/ofproto/ofproto_v1_3_parser.py advances its multipart-body offset by an attacker-controlled length without rejecting zero, so parsing never terminates. Network access to the controller's OpenFlow listener is sufficient, and the resulting loop interrupts controller processing.

CVSS severity7.5
High
EPSS probability0.68%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop denial of service in Faucet SDN Ryu 4.34 allows remote attackers to hang the controller with a crafted OpenFlow reply. OFPMultipartReply.parser in ryu/ofproto/ofproto_v1_3_parser.py advances its multipart-body offset by an attacker-controlled length without rejecting zero, so parsing never terminates. Network access to the controller's OpenFlow listener is sufficient, and the resulting loop interrupts controller processing.

The record

CVE
CVE-2024-34488
Published
May 5, 2024
Updated
Aug 2, 2024
Vendor
Faucet SDN
Product
Ryu
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=4.34

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Faucet SDN · Ryuversion=4.34

Published CVSS scores

7.5CISA-ADPCVSS: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

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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