CVE-2009-4443

Unspecified vulnerability in the psearch (aka persistent search) functionality in Directory Proxy Server (DPS) in Sun Java System Directory Server Enterprise Edition 6.0 through 6.3.1 allows remote attackers to cause a denial of service (psearch outage) by using a crafted psearch client to send requests that trigger a psearch thread loop, aka Bug Id 6855978.

Published: 2009-12-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4443 is rated Moderate Risk (45.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.11%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-4443

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.48% 2.11% +0.63%
2 2025-03-30 1.66% 1.48% -0.17%
3 2025-03-29 — 1.66% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4443

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2009-4443

Affected software / configurations for CVE-2009-4443

Vendor Product Version Raw CPE
sun java_system_directory_server 6.0 cpe:2.3:a:sun:java_system_directory_server:6.0:*:enterprise:*:*:*:*:*
sun java_system_directory_server 6.1 cpe:2.3:a:sun:java_system_directory_server:6.1:enterprise:*:*:*:*:*:*
sun java_system_directory_server 6.2 cpe:2.3:a:sun:java_system_directory_server:6.2:enterprise:*:*:*:*:*:*
sun java_system_directory_server 6.3 cpe:2.3:a:sun:java_system_directory_server:6.3:enterprise:*:*:*:*:*:*
sun java_system_directory_server 6.3.1 cpe:2.3:a:sun:java_system_directory_server:6.3.1:enterprise:*:*:*:*:*:*

References for CVE-2009-4443

cvelogic Threat Intelligence