The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."
Published Feb 9, 2011
5.0
MEDIUMCVSS 2.0
EPSS 22.76%
Description
The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."
Affected products
No data.
- n/a
- n/a
- 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.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 22.76% (0.22760) | 97.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 22.76% (0.22760) | 97.43th | v5 (v2026.06.15) |
| Jun 14, 2026 | 35.77% (0.35766) | 97.19th | v4 (v2025.03.14) |
| May 29, 2025 | 40.23% (0.40229) | 97.16th | v4 (v2025.03.14) |
| Mar 30, 2025 | 41.39% (0.41395) | 97.13th | v4 (v2025.03.14) |
| Mar 29, 2025 | 33.91% (0.33909) | 95.27th | v4 (v2025.03.14) |
| Mar 19, 2025 | 41.39% (0.41395) | 96.99th | v4 (v2025.03.14) |
| Mar 17, 2025 | 43.53% (0.43531) | 97.21th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.54% (0.03539) | 91.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.38% (0.05375) | 91.90th | v3 (v2023.03.01) |
| Mar 6, 2023 | 38.12% (0.38119) | 97.96th | v2 (v2022.01.01) |
| Jan 27, 2023 | 38.12% (0.38119) | 97.93th | v2 (v2022.01.01) |
| Feb 4, 2022 | 41.00% (0.41003) | 97.52th | v2 (v2022.01.01) |
References (8)
- http://osvdb.org/70825 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/43215 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.securityfocus.com/bid/46145 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1025042 vdb-entryx_refsource_SECTRACK
- http://www.vupen.com/english/advisories/2011/0319 vdb-entryx_refsource_VUPENVendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-005 vendor-advisoryx_refsource_MS
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64915 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12485 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://osvdb.org/70825 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/43215 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.securityfocus.com/bid/46145 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1025042 | vdb-entryx_refsource_SECTRACK | |
| http://www.vupen.com/english/advisories/2011/0319 | vdb-entryx_refsource_VUPENVendor Advisory | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-005 | vendor-advisoryx_refsource_MS | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/64915 | vdb-entryx_refsource_XF | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12485 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.