CVE-2024-24991Network attack vector

Authenticated service crash via null pointer dereference

Published Apr 19, 2024 · Updated Aug 1, 2024

Null pointer dereference in Ivanti Avalanche before 6.4.3 allows remote authenticated users to crash WLAvalancheService via TCP port 1777. WLAvalancheService listens on that port by default and dereferences a null pointer while processing an attacker-controlled authenticated request. Successful exploitation interrupts the management service without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability1.73%
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 Ivanti Avalanche before 6.4.3 allows remote authenticated users to crash WLAvalancheService via TCP port 1777. WLAvalancheService listens on that port by default and dereferences a null pointer while processing an attacker-controlled authenticated request. Successful exploitation interrupts the management service without reported data disclosure or modification.

The record

CVE
CVE-2024-24991
Published
Apr 19, 2024
Updated
Aug 1, 2024
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=6.4.3 <6.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ivanti · Avalancheversion=6.4.3 <6.4.3

Published CVSS scores

6.5HackerOneCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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