HIGH
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
Published Jun 10, 2009
10.0
HIGHCVSS 2.0
EPSS 39.40%
Description
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.
Affected products
No data.
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
39.40% 0.39404
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.39404
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (31 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 39.40% (0.39404) | 98.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 39.40% (0.39404) | 98.42th | v5 (v2026.06.15) |
| Dec 27, 2025 | 58.55% (0.58555) | 98.12th | v4 (v2025.03.14) |
| Oct 23, 2025 | 60.40% (0.60404) | 98.17th | v4 (v2025.03.14) |
| Oct 1, 2025 | 63.76% (0.63762) | 98.37th | v4 (v2025.03.14) |
| Mar 30, 2025 | 60.40% (0.60404) | 98.11th | v4 (v2025.03.14) |
| Mar 29, 2025 | 65.92% (0.65916) | 97.93th | v4 (v2025.03.14) |
| Mar 17, 2025 | 60.40% (0.60404) | 98.08th | v4 (v2025.03.14) |
| Mar 1, 2025 | 88.39% (0.88391) | 99.00th | v3 (v2023.03.01) |
| Dec 19, 2024 | 90.17% (0.90171) | 99.06th | v3 (v2023.03.01) |
| Dec 12, 2024 | 87.26% (0.87261) | 98.76th | v3 (v2023.03.01) |
| May 17, 2024 | 87.92% (0.87921) | 98.65th | v3 (v2023.03.01) |
| Apr 9, 2024 | 88.81% (0.88811) | 98.67th | v3 (v2023.03.01) |
| Feb 29, 2024 | 88.50% (0.88496) | 98.60th | v3 (v2023.03.01) |
| Jan 19, 2024 | 87.22% (0.87224) | 98.38th | v3 (v2023.03.01) |
| Dec 9, 2023 | 88.22% (0.88223) | 98.38th | v3 (v2023.03.01) |
| Oct 28, 2023 | 90.60% (0.90596) | 98.48th | v3 (v2023.03.01) |
| Jul 29, 2023 | 90.42% (0.90417) | 98.38th | v3 (v2023.03.01) |
| Jun 13, 2023 | 92.12% (0.92124) | 98.46th | v3 (v2023.03.01) |
| Apr 29, 2023 | 92.25% (0.92250) | 98.43th | v3 (v2023.03.01) |
| Mar 16, 2023 | 92.53% (0.92530) | 98.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 94.16% (0.94164) | 98.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 46.72% (0.46718) | 98.56th | v2 (v2022.01.01) |
| Nov 11, 2022 | 46.72% (0.46718) | 98.49th | v2 (v2022.01.01) |
| Sep 10, 2022 | 49.76% (0.49756) | 98.63th | v2 (v2022.01.01) |
| Jul 18, 2022 | 55.10% (0.55095) | 98.72th | v2 (v2022.01.01) |
| Jul 17, 2022 | 11.27% (0.11270) | 94.87th | v2 (v2022.01.01) |
| Jul 9, 2022 | 55.10% (0.55095) | 98.71th | v2 (v2022.01.01) |
| May 5, 2022 | 57.79% (0.57789) | 98.73th | v2 (v2022.01.01) |
| Mar 1, 2022 | 60.01% (0.60013) | 98.64th | v2 (v2022.01.01) |
| Feb 4, 2022 | 69.86% (0.69860) | 98.97th | v2 (v2022.01.01) |
Weaknesses (1)
References (10)
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=804 third-party-advisoryx_refsource_IDEFENSE
- http://osvdb.org/54937 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/35355 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://support.avaya.com/elmodocs2/security/ASA-2009-214.htm x_refsource_CONFIRM
- http://www.securityfocus.com/bid/35226 vdb-entryx_refsource_BIDPatch
- http://www.securitytracker.com/id?1022349 vdb-entryx_refsource_SECTRACK
- http://www.us-cert.gov/cas/techalerts/TA09-160A.html third-party-advisoryx_refsource_CERTUS Government Resource
- http://www.vupen.com/english/advisories/2009/1537 vdb-entryx_refsource_VUPENPatchVendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-018 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6180 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=804 | third-party-advisoryx_refsource_IDEFENSE | |
| http://osvdb.org/54937 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/35355 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://support.avaya.com/elmodocs2/security/ASA-2009-214.htm | x_refsource_CONFIRM | |
| http://www.securityfocus.com/bid/35226 | vdb-entryx_refsource_BIDPatch | |
| http://www.securitytracker.com/id?1022349 | vdb-entryx_refsource_SECTRACK | |
| http://www.us-cert.gov/cas/techalerts/TA09-160A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| http://www.vupen.com/english/advisories/2009/1537 | vdb-entryx_refsource_VUPENPatchVendor Advisory | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-018 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6180 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Jun 10, 2009
Updated Aug 7, 2024
Reserved Mar 25, 2009
Link CVE-2009-1138
CISA Vulnrichment
Updated n/a