CVE-2024-38536Network attack vector

Service crash via failed HTTP range allocation

Published Jul 11, 2024 · Updated Aug 2, 2024

NULL pointer dereference in Suricata 7.0.5 and earlier allows remote attackers to crash the engine through inspected HTTP range traffic. When http.memcap exhaustion makes HttpRangeOpenFileAux return NULL, HttpRangeOpenFile passes that pointer to HttpRangeAppendData, which dereferences its toskip member. An unauthenticated sender whose HTTP response crosses the monitored path can stop the IDS, IPS, or monitoring engine; no data disclosure or modification is reported.

CVSS severity7.5
High
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Suricata 7.0.5 and earlier allows remote attackers to crash the engine through inspected HTTP range traffic. When http.memcap exhaustion makes HttpRangeOpenFileAux return NULL, HttpRangeOpenFile passes that pointer to HttpRangeAppendData, which dereferences its toskip member. An unauthenticated sender whose HTTP response crosses the monitored path can stop the IDS, IPS, or monitoring engine; no data disclosure or modification is reported.

The record

CVE
CVE-2024-38536
Published
Jul 11, 2024
Updated
Aug 2, 2024
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 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=0 <7.0.6
  2. Affected versionversion=< 7.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=0 <7.0.6; version=< 7.0.6

Published CVSS scores

7.5GitHub, Inc.CVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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