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CVE-2025-27497— OpenDJ Denial of Service (Dos) using alias loop

Quick assessment

Affected
OpenIdentityPlatform OpenDJ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenDJ是Open Identity Platform开源的一个目录服务。 OpenDJ 4.9.3之前版本存在安全漏洞，该漏洞源于别名循环导致拒绝服务攻击。

AI Predicted 5.3 Difficulty: Easy EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-27497

Vulnerability Information
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Vulnerability Title
OpenDJ Denial of Service (Dos) using alias loop
Source: CVE Program / CVE List V5
Vulnerability Description
OpenDJ is an LDAPv3 compliant directory service. OpenDJ prior to 4.9.3 contains a denial-of-service (DoS) vulnerability that causes the server to become unresponsive to all LDAP requests without crashing or restarting. This issue occurs when an alias loop exists in the LDAP database. If an ldapsearch request is executed with alias dereferencing set to "always" on this alias entry, the server stops responding to all future requests. Fortunately, the server can be restarted without data corruption. This vulnerability is fixed in 4.9.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenDJ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenDJ是Open Identity Platform开源的一个目录服务。 OpenDJ 4.9.3之前版本存在安全漏洞，该漏洞源于别名循环导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenIdentityPlatform OpenDJ < 4.9.3 -

II. Public POCs for CVE-2025-27497

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III. Intelligence Information for CVE-2025-27497

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Patches & Fixes for CVE-2025-27497 (1)

Vendor Advisories for CVE-2025-27497 (1)

IV. Related Vulnerabilities

Same product: OpenDJ
Same vendor: OpenIdentityPlatform
Same weakness: CWE-835

V. Comments for CVE-2025-27497

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