CVE-2024-32867Network attack vector

Policy bypass via incorrect fragment reassembly

Published May 7, 2024 · Updated Aug 2, 2024

Improper IP defragmentation in OISF Suricata 6.0.0 through 6.0.18 and 7.0.0 through 7.0.4 allows remote attackers to bypass rules. The defragmenter applies incorrect precedence to overlapping fragments and sums fragment lengths when deciding that reassembly is complete, even when holes remain. Crafted fragmented traffic can therefore be reconstructed differently from an endpoint and evade the rules or inline policy intended to inspect it.

CVSS severity5.3
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper IP defragmentation in OISF Suricata 6.0.0 through 6.0.18 and 7.0.0 through 7.0.4 allows remote attackers to bypass rules. The defragmenter applies incorrect precedence to overlapping fragments and sums fragment lengths when deciding that reassembly is complete, even when holes remain. Crafted fragmented traffic can therefore be reconstructed differently from an endpoint and evade the rules or inline policy intended to inspect it.

The record

CVE
CVE-2024-32867
Published
May 7, 2024
Updated
Aug 2, 2024
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-754, T1562.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 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=>= 6.0.0, <= 6.0.18
  2. Affected versionversion=>= 6.0.0, <= 6.0.18, >= 7.0.0, <= 7.0.4
  3. Affected versionversion=>= 7.0.0, <= 7.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=>= 6.0.0, <= 6.0.18; version=>= 6.0.0, <= 6.0.18, >= 7.0.0, <= 7.0.4; version=>= 7.0.0, <= 7.0.4

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

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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