CVE-2024-2199

Authenticated LDAP server crash via malformed userPassword

Published May 28, 2024 · Updated Jun 26, 2026

Improper input validation in 389 Directory Server before 3.1.1 allows remote authenticated users to crash the LDAP server. The do_modify path in slapd/modify.c accepts a malformed userPassword modification that reaches ldap_mods_free and terminates ns-slapd. The attacker must authenticate and hold permission to modify userPassword; exploitation interrupts directory availability without reported disclosure.

CVSS severity5.7
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in 389 Directory Server before 3.1.1 allows remote authenticated users to crash the LDAP server. The do_modify path in slapd/modify.c accepts a malformed userPassword modification that reaches ldap_mods_free and terminates ns-slapd. The attacker must authenticate and hold permission to modify userPassword; exploitation interrupts directory availability without reported disclosure.

The record

CVE
CVE-2024-2199
Published
May 28, 2024
Updated
Jun 26, 2026
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
CWE-20, T1499
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record 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 versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
389 Directory Server · 389 Directory Serverversion=0 <3.1.1
Red Hat · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9.2 Extended Update SupportAffected versions are unavailable in this record.
Red Hat · Red Hat Directory ServerAffected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 8.8 Extended Update SupportAffected versions are unavailable in this record.

Published CVSS scores

5.7Red HatCVSS:3.1/AV:A/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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