├── LICENSE ├── README.md ├── cmd └── testserver │ ├── .gitignore │ └── main.go ├── main.go └── main_test.go /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # kxss 2 | [1.1]: http://i.imgur.com/tXSoThF.png 3 | [1]: https://twitter.com/TobiunddasMoe 4 | This a adaption of tomnomnom's kxss tool with a different output format. I didn't want to fork his whole Hacks-Repository so created my Own ;-) 5 | 6 | All Credit for this Code goes to [Tomnomnom](https://github.com/tomnomnom/) 7 | 8 | ## Changes to original kxss 9 | I changed the output format of kxss to make it better grepable for my recon script. My new Output Looks like this: 10 | ``` 11 | URL: https://www.**********.***/event_register.php?event=177 Param: event Unfiltered: [" ' < >] 12 | ``` 13 | 14 | ## Installation 15 | To install this Tool please use the following Command: 16 | ``` 17 | go get github.com/Emoe/kxss 18 | ``` 19 | 20 | ## Usage 21 | To run this script use the following command: 22 | ``` 23 | echo "https://www.**********.***/event_register.php?event=177" | kxss 24 | ``` 25 | 26 | ## Question 27 | If you have an question you can create an Issue or ping me on [![alt text][1.1]][1] 28 | -------------------------------------------------------------------------------- /cmd/testserver/.gitignore: -------------------------------------------------------------------------------- 1 | testserver 2 | -------------------------------------------------------------------------------- /cmd/testserver/main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "log" 6 | "net/http" 7 | ) 8 | 9 | func main() { 10 | http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { 11 | qs := r.URL.Query() 12 | log.Printf("req: %#v", qs) 13 | w.Header().Add("Content-Type", "text/html") 14 | fmt.Fprintf(w, "Hello, %s!\n", qs.Get("name")) 15 | fmt.Fprintf(w, "I hear you're %s years old!\n", qs.Get("age")) 16 | fmt.Fprint(w, "My name is Buck and I'm here to greet you.\n") 17 | }) 18 | 19 | http.ListenAndServe("127.0.0.1:5566", nil) 20 | } 21 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "bufio" 5 | "crypto/tls" 6 | "fmt" 7 | "io/ioutil" 8 | "net" 9 | "net/http" 10 | "net/url" 11 | "os" 12 | "strings" 13 | "sync" 14 | "time" 15 | ) 16 | 17 | type paramCheck struct { 18 | url string 19 | param string 20 | } 21 | 22 | var transport = &http.Transport{ 23 | TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, 24 | DialContext: (&net.Dialer{ 25 | Timeout: 30 * time.Second, 26 | KeepAlive: time.Second, 27 | DualStack: true, 28 | }).DialContext, 29 | } 30 | 31 | var httpClient = &http.Client{ 32 | Transport: transport, 33 | } 34 | 35 | func main() { 36 | 37 | httpClient.CheckRedirect = func(req *http.Request, via []*http.Request) error { 38 | return http.ErrUseLastResponse 39 | } 40 | 41 | sc := bufio.NewScanner(os.Stdin) 42 | 43 | initialChecks := make(chan paramCheck, 40) 44 | 45 | appendChecks := makePool(initialChecks, func(c paramCheck, output chan paramCheck) { 46 | reflected, err := checkReflected(c.url) 47 | if err != nil { 48 | //fmt.Fprintf(os.Stderr, "error from checkReflected: %s\n", err) 49 | return 50 | } 51 | 52 | if len(reflected) == 0 { 53 | // TODO: wrap in verbose mode 54 | //fmt.Printf("no params were reflected in %s\n", c.url) 55 | return 56 | } 57 | 58 | for _, param := range reflected { 59 | output <- paramCheck{c.url, param} 60 | } 61 | }) 62 | 63 | charChecks := makePool(appendChecks, func(c paramCheck, output chan paramCheck) { 64 | wasReflected, err := checkAppend(c.url, c.param, "iy3j4h234hjb23234") 65 | if err != nil { 66 | fmt.Fprintf(os.Stderr, "error from checkAppend for url %s with param %s: %s", c.url, c.param, err) 67 | return 68 | } 69 | 70 | if wasReflected { 71 | output <- paramCheck{c.url, c.param} 72 | } 73 | }) 74 | 75 | done := makePool(charChecks, func(c paramCheck, output chan paramCheck) { 76 | output_of_url := []string{c.url, c.param} 77 | for _, char := range []string{"\"", "'", "<", ">", "$", "|", "(", ")", "`", ":", ";", "{", "}"} { 78 | wasReflected, err := checkAppend(c.url, c.param, "aprefix"+char+"asuffix") 79 | if err != nil { 80 | fmt.Fprintf(os.Stderr, "error from checkAppend for url %s with param %s with %s: %s", c.url, c.param, char, err) 81 | continue 82 | } 83 | 84 | if wasReflected { 85 | output_of_url = append(output_of_url, char) 86 | } 87 | } 88 | if len(output_of_url) >= 2 { 89 | fmt.Printf("URL: %s Param: %s Unfiltered: %v \n", output_of_url[0] , output_of_url[1],output_of_url[2:]) 90 | } 91 | }) 92 | 93 | for sc.Scan() { 94 | initialChecks <- paramCheck{url: sc.Text()} 95 | } 96 | 97 | close(initialChecks) 98 | <-done 99 | } 100 | 101 | func checkReflected(targetURL string) ([]string, error) { 102 | 103 | out := make([]string, 0) 104 | 105 | req, err := http.NewRequest("GET", targetURL, nil) 106 | if err != nil { 107 | return out, err 108 | } 109 | 110 | // temporary. Needs to be an option 111 | req.Header.Add("User-Agent", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.100 Safari/537.36") 112 | 113 | resp, err := httpClient.Do(req) 114 | if err != nil { 115 | return out, err 116 | } 117 | if resp.Body == nil { 118 | return out, err 119 | } 120 | defer resp.Body.Close() 121 | 122 | // always read the full body so we can re-use the tcp connection 123 | b, err := ioutil.ReadAll(resp.Body) 124 | if err != nil { 125 | return out, err 126 | } 127 | 128 | // nope (: 129 | if strings.HasPrefix(resp.Status, "3") { 130 | return out, nil 131 | } 132 | 133 | // also nope 134 | ct := resp.Header.Get("Content-Type") 135 | if ct != "" && !strings.Contains(ct, "html") { 136 | return out, nil 137 | } 138 | 139 | body := string(b) 140 | 141 | u, err := url.Parse(targetURL) 142 | if err != nil { 143 | return out, err 144 | } 145 | 146 | for key, vv := range u.Query() { 147 | for _, v := range vv { 148 | if !strings.Contains(body, v) { 149 | continue 150 | } 151 | 152 | out = append(out, key) 153 | } 154 | } 155 | 156 | return out, nil 157 | } 158 | 159 | func checkAppend(targetURL, param, suffix string) (bool, error) { 160 | u, err := url.Parse(targetURL) 161 | if err != nil { 162 | return false, err 163 | } 164 | 165 | qs := u.Query() 166 | val := qs.Get(param) 167 | //if val == "" { 168 | //return false, nil 169 | //return false, fmt.Errorf("can't append to non-existant param %s", param) 170 | //} 171 | 172 | qs.Set(param, val+suffix) 173 | u.RawQuery = qs.Encode() 174 | 175 | reflected, err := checkReflected(u.String()) 176 | if err != nil { 177 | return false, err 178 | } 179 | 180 | for _, r := range reflected { 181 | if r == param { 182 | return true, nil 183 | } 184 | } 185 | 186 | return false, nil 187 | } 188 | 189 | type workerFunc func(paramCheck, chan paramCheck) 190 | 191 | func makePool(input chan paramCheck, fn workerFunc) chan paramCheck { 192 | var wg sync.WaitGroup 193 | 194 | output := make(chan paramCheck) 195 | for i := 0; i < 40; i++ { 196 | wg.Add(1) 197 | go func() { 198 | for c := range input { 199 | fn(c, output) 200 | } 201 | wg.Done() 202 | }() 203 | } 204 | 205 | go func() { 206 | wg.Wait() 207 | close(output) 208 | }() 209 | 210 | return output 211 | } 212 | -------------------------------------------------------------------------------- /main_test.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "net/http" 6 | "net/http/httptest" 7 | "testing" 8 | ) 9 | 10 | func TestSimple(t *testing.T) { 11 | ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { 12 | w.Header().Set("Content-Type", "text/html") 13 | qs := r.URL.Query() 14 | fmt.Fprintf(w, "hello, %s", qs.Get("name")) 15 | })) 16 | 17 | defer ts.Close() 18 | 19 | r, err := checkReflected(ts.URL + "?name=Mr%20Naughty") 20 | t.Logf("params reflected: %#v", r) 21 | 22 | if err != nil { 23 | t.Fatalf("expected nil error from checkReflected(), have %s", err) 24 | } 25 | 26 | if len(r) != 1 { 27 | t.Errorf("wanted length 1 for returned keys, have %d", len(r)) 28 | } 29 | } 30 | 31 | func TestAppend(t *testing.T) { 32 | ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { 33 | w.Header().Set("Content-Type", "text/html") 34 | qs := r.URL.Query() 35 | fmt.Fprintf(w, "hello, %s", qs.Get("name")) 36 | })) 37 | 38 | defer ts.Close() 39 | 40 | r, err := checkAppend(ts.URL+"?name=Mr%20Naughty", "name", "somerandomvalue") 41 | 42 | if err != nil { 43 | t.Fatalf("expected nil error from checkAppend(), have %s", err) 44 | } 45 | 46 | if !r { 47 | t.Errorf("wanted checkAppend() to return true, but it didn't") 48 | } 49 | } 50 | --------------------------------------------------------------------------------