Analyst readout for executives and security teams
Plain-English summary
CVE-2003-0011 is a denial-of-service issue in Microsoft ISA Server 2000’s DNS intrusion detection application filter. A specially formed incoming DNS request can be mishandled and cause DNS traffic through the server to be blocked. This is mainly an availability risk for organizations still using legacy ISA Server 2000 infrastructure.
Executive priority
Treat this as a legacy-infrastructure availability risk. Priority is highest where ISA Server 2000 still mediates production DNS or perimeter traffic. Modernized environments are unlikely to be affected.
Technical view
The vulnerability is described as an unknown flaw in the DNS intrusion detection application filter for ISA Server 2000. Remote traffic containing a certain DNS request type can trigger improper handling, resulting in DNS server traffic being blocked. The bundle provides no CVSS, CWE, root-cause detail, or affected version granularity beyond ISA Server 2000.
Likely exposure
Exposure appears limited to environments still running Microsoft ISA Server 2000 with the DNS intrusion detection application filter in the DNS traffic path. The provided affected-product metadata is incomplete, so asset confirmation is required.
Exploitation context
The source bundle does not show CISA KEV listing or evidence of active exploitation. The described impact is remote denial of service by causing DNS traffic to be blocked, not code execution or data theft.
Researcher notes
Public details are sparse: no CVSS, CWE, or precise request format is included in the bundle. Avoid assuming affected versions beyond ISA Server 2000 or claiming exploitation. Focus validation on asset presence, filter configuration, and MS03-009 status.
Mitigation direction
- Identify any remaining Microsoft ISA Server 2000 deployments.
- Review and apply Microsoft guidance in MS03-009 where applicable.
- Remove or replace unsupported legacy ISA Server infrastructure where possible.
- Restrict exposed DNS-related traffic paths to necessary trusted sources.
- Monitor vendor and internal records for compensating-control requirements.
Validation and detection
- Inventory internet-facing and internal ISA Server 2000 systems.
- Confirm whether the DNS intrusion detection application filter is enabled.
- Check patch or configuration status against Microsoft MS03-009.
- Review DNS outage logs around ISA Server filtering events.
- Verify business services do not depend on unsupported ISA Server routing.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2003-0011 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 7145CVE reference · vdb-entry, x_refsource_BID
- MS03-009CVE reference · vendor-advisory, x_refsource_MS
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.