Security readout for executives and security teams
Plain-English summary
This vulnerability affects Microsoft Windows OCSP servers. A remote, unauthenticated attacker could cause a denial of service, disrupting certificate status checks that applications rely on for trust decisions. The provided sources do not indicate data theft or code execution. Microsoft lists this as patched, so prioritize affected OCSP servers that support important services.
Executive priority
Treat this as a high-priority availability risk for PKI-dependent environments. It is most urgent where OCSP outages could interrupt authentication, certificate validation, remote access, or customer-facing services. Patch according to Microsoft guidance and verify coverage across legacy servers.
Technical view
CVE-2024-43545 is a Windows Online Certificate Status Protocol Server denial-of-service issue mapped to CWE-400. The CVSS 3.1 score is 7.5 with network attack vector, low complexity, no privileges, no user interaction, and high availability impact only. Affected products span Windows Server 2008 through Windows Server 2022 variants listed by Microsoft.
Likely exposure
Exposure is limited to Microsoft Windows Server systems running the OCSP server or Online Responder role on affected versions. Risk is higher where OCSP availability supports public certificate validation, internal PKI, authentication, VPN, device trust, or application access flows.
Exploitation context
The source bundle marks KEV as false and the CVSS exploit maturity as unproven. No provided source states active exploitation. The main concern is remote service disruption, not confidentiality or integrity compromise, based on the CVSS vector and Microsoft description.
Researcher notes
The public bundle provides severity, CVSS, affected platforms, CWE-400, and Microsoft patch reference, but no root-cause detail or exploit narrative. Avoid assuming exploitability beyond remote unauthenticated denial of service. Validation should focus on OCSP role presence, affected OS version, and patch state.
Mitigation direction
- Apply Microsoft security updates listed in the MSRC advisory for affected Windows Server versions.
- Prioritize OCSP servers supporting internet-facing, authentication, VPN, or business-critical certificate validation paths.
- Review Microsoft guidance for version-specific update availability and servicing requirements.
- Track legacy Windows Server 2008 and 2012 systems separately for update coverage.
Validation and detection
- Inventory Windows Server hosts running Microsoft OCSP or Online Responder services.
- Match OS versions against the affected Windows Server list in the CVE and MSRC records.
- Confirm the applicable Microsoft security update is installed on each affected host.
- Monitor OCSP service availability and certificate-validation dependent services after remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-43545 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C3.93.6microsoftVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Windows Online Certificate Status Protocol (OCSP) Server Denial of Service VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.