CVE-2024-43544· NVD / CVE Program· CNA microsoft

Microsoft Simple Certificate Enrollment Protocol Denial of Service Vulnerability

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 2.2% (FIRST EPSS); higher than 82.5% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

HighCVSS 7.5 · v3.1—No exploit No fix recorded

BDU:2024-08067

Published: Oct 8, 2024
Updated: Aug 19, 2026
EPSS: 2.2% · 82th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.2%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · microsoft: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

ProductVersion

Vendor	Product	CPE
microsoft	windows server 2008	cpe:2.3:o:microsoft:windows_server_2008
microsoft	windows server 2012	cpe:2.3:o:microsoft:windows_server_2012
microsoft	windows server 2016	cpe:2.3:o:microsoft:windows_server_2016
microsoft	windows server 2019	cpe:2.3:o:microsoft:windows_server_2019
microsoft	windows server 2022	cpe:2.3:o:microsoft:windows_server_2022
microsoft	windows server 2022 23h2	cpe:2.3:o:microsoft:windows_server_2022_23h2

Using windows server 2008? Add it to your stack and be the first to know about CVEs like this one. (Windows Server, Active Directory)

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

microsoft windows server 2008all versions
microsoft windows server 2008r2
microsoft windows server 2012all versions
microsoft windows server 2012r2
microsoft windows server 2016before 10.0.14393.7428
microsoft windows server 2019before 10.0.17763.6414
microsoft windows server 2022before 10.0.20348.2762
microsoft windows server 2022 23h2before 10.0.25398.1189

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

Microsoft Windows Server 2008 Service Pack 2
- 6.0.6003.0 and later · before 6.0.6003.22918affected
Microsoft Windows Server 2008 R2 Service Pack 1
- 6.1.7601.0 and later · before 6.1.7601.27366affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- 6.1.7601.0 and later · before 6.1.7601.27366affected
Microsoft Windows Server 2008 Service Pack 2
- 6.0.6003.0 and later · before 6.0.6003.22918affected
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
- 6.0.6003.0 and later · before 6.0.6003.22918affected
Microsoft Windows Server 2012
- 6.2.9200.0 and later · before 6.2.9200.25118affected
Microsoft Windows Server 2012 (Server Core installation)
- 6.2.9200.0 and later · before 6.2.9200.25118affected
Microsoft Windows Server 2012 R2
- 6.3.9600.0 and later · before 6.3.9600.22221affected
Microsoft Windows Server 2012 R2 (Server Core installation)
- 6.3.9600.0 and later · before 6.3.9600.22221affected
Microsoft Windows Server 2016
- 10.0.14393.0 and later · before 10.0.14393.7428affected
Microsoft Windows Server 2016 (Server Core installation)
- 10.0.14393.0 and later · before 10.0.14393.7428affected
Microsoft Windows Server 2019
- 10.0.17763.0 and later · before 10.0.17763.6414affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

CVE-2020-1350A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows KEV
99Now
CVE-2020-1040A remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticaKEV
68This week
CVE-2009-3103Array index error in the SMBv2 protocol implementation in srv2.sys in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold a
68This week

Published before and after this one in the same product

← EarlierCVE-2024-43456Oct 8, 2024 · Windows Remote Desktop Services Tampering Vulnerability
29Monitor
← EarlierCVE-2024-43541Oct 8, 2024 · Microsoft Simple Certificate Enrollment Protocol Denial of Service Vulnerability
31Monitor
Later →CVE-2024-43545Oct 8, 2024 · Windows Online Certificate Status Protocol (OCSP) Server Denial of Service Vulnerability
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-26212182 days apartDHCP Server Service Denial of Service Vulnerability
49Plan
CVE-2024-435410 days apartMicrosoft Simple Certificate Enrollment Protocol Denial of Service Vulnerability
31Monitor
CVE-2024-435450 days apartWindows Online Certificate Status Protocol (OCSP) Server Denial of Service Vulnerability
31Monitor
CVE-2024-3823628 days apartDHCP Server Service Denial of Service Vulnerability
31Monitor
CVE-2024-3803191 days apartWindows Online Certificate Status Protocol (OCSP) Server Denial of Service Vulnerability
31Monitor
CVE-2024-3806791 days apartWindows Online Certificate Status Protocol (OCSP) Server Denial of Service Vulnerability
31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43544

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records