CVE-2009-1138 in the critical feed json
The LDAP service in Active Directory on Microsoft Windows 2000 SP4 does not properly free memory for LDAP and LDAPS requests, which allows…
published 2009-06-10 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1139
- cvss
- 10.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 39.4%
- EPSS 39.4% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
The LDAP service in Active Directory on Microsoft Windows 2000 SP4 does not properly free memory for LDAP and LDAPS requests, which allows remote attackers to execute arbitrary code via a request that uses hexadecimal encoding, whose associated memory is not released, related to a "DN AttributeValue," aka "Active Directory Invalid Free Vulnerability." NOTE: this issue is probably a memory leak.
Patch / fix
Exploit prediction
39.40% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-399 Resource Management Errors
References
-
securityfocus.com
/bid/35226
vdb-entry, patch
-
vupen.com
/english/advisories/2009/1537
vdb-entry, patch, vendor-advisory
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2009/ms09-018
vendor-advisory
-
secunia.com
/advisories/35355
third-party-advisory, vendor-advisory
-
labs.idefense.com
/intelligence/vulnerabilities/display.php?id=804
third-party-advisory
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6180
vdb-entry, signature
- support.avaya.com /elmodocs2/security/ASA-2009-214.htm
-
securitytracker.com
/id?1022349
vdb-entry
-
us-cert.gov
/cas/techalerts/TA09-160A.html
third-party-advisory, us-government-resource
-
osvdb.org
/54937
vdb-entry
Sources
- CVE List CVE-2009-1138
- NVD CVE-2009-1138
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