CVE-2022-2850Public exploitNetwork attack vector

Authenticated LDAP service crash via malformed sync cookie

Published Oct 14, 2022 · Updated Nov 3, 2025

NULL pointer dereference in 389 Directory Server 2.0.0 through 2.4.1 allows remote authenticated users to crash the LDAP service. The sync_repl cookie parser accepts a synchronization cookie lacking the required '#' separator as an empty Sync_Cookie, which later code dereferences. The Content Synchronization plugin must be enabled and valid LDAP credentials are required; exploitation terminates the server process and interrupts directory service.

CVSS severity6.5
Medium
EPSS probability1.30%
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 389 Directory Server 2.0.0 through 2.4.1 allows remote authenticated users to crash the LDAP service. The sync_repl cookie parser accepts a synchronization cookie lacking the required '#' separator as an empty Sync_Cookie, which later code dereferences. The Content Synchronization plugin must be enabled and valid LDAP credentials are required; exploitation terminates the server process and interrupts directory service.

The record

CVE
CVE-2022-2850
Published
Oct 14, 2022
Updated
Nov 3, 2025
Vendor
389 Directory Server
Product
389 Directory Server
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record 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=389-ds-base-2.0.x+

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · 389 Directory Serverversion=389-ds-base-2.0.x+

Published CVSS scores

6.5NVDCVSS: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.

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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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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