佩里的实验室

DVWA - JavaScript

2022/8/29 网络安全

# Low

# 源代码

<?php
$page[ 'body' ] .= <<<EOF
<script>

/*
MD5 code from here
https://github.com/blueimp/JavaScript-MD5
*/

!function(n){"use strict";function t(n,t){var r=(65535&n)+(65535&t);return(n>>16)+(t>>16)+(r>>16)<<16|65535&r}function r(n,t){return n<<t|n>>>32-t}function e(n,e,o,u,c,f){return t(r(t(t(e,n),t(u,f)),c),o)}function o(n,t,r,o,u,c,f){return e(t&r|~t&o,n,t,u,c,f)}function u(n,t,r,o,u,c,f){return e(t&o|r&~o,n,t,u,c,f)}function c(n,t,r,o,u,c,f){return e(t^r^o,n,t,u,c,f)}function f(n,t,r,o,u,c,f){return e(r^(t|~o),n,t,u,c,f)}function i(n,r){n[r>>5]|=128<<r%32,n[14+(r+64>>>9<<4)]=r;var e,i,a,d,h,l=1732584193,g=-271733879,v=-1732584194,m=271733878;for(e=0;e<n.length;e+=16)i=l,a=g,d=v,h=m,g=f(g=f(g=f(g=f(g=c(g=c(g=c(g=c(g=u(g=u(g=u(g=u(g=o(g=o(g=o(g=o(g,v=o(v,m=o(m,l=o(l,g,v,m,n[e],7,-680876936),g,v,n[e+1],12,-389564586),l,g,n[e+2],17,606105819),m,l,n[e+3],22,-1044525330),v=o(v,m=o(m,l=o(l,g,v,m,n[e+4],7,-176418897),g,v,n[e+5],12,1200080426),l,g,n[e+6],17,-1473231341),m,l,n[e+7],22,-45705983),v=o(v,m=o(m,l=o(l,g,v,m,n[e+8],7,1770035416),g,v,n[e+9],12,-1958414417),l,g,n[e+10],17,-42063),m,l,n[e+11],22,-1990404162),v=o(v,m=o(m,l=o(l,g,v,m,n[e+12],7,1804603682),g,v,n[e+13],12,-40341101),l,g,n[e+14],17,-1502002290),m,l,n[e+15],22,1236535329),v=u(v,m=u(m,l=u(l,g,v,m,n[e+1],5,-165796510),g,v,n[e+6],9,-1069501632),l,g,n[e+11],14,643717713),m,l,n[e],20,-373897302),v=u(v,m=u(m,l=u(l,g,v,m,n[e+5],5,-701558691),g,v,n[e+10],9,38016083),l,g,n[e+15],14,-660478335),m,l,n[e+4],20,-405537848),v=u(v,m=u(m,l=u(l,g,v,m,n[e+9],5,568446438),g,v,n[e+14],9,-1019803690),l,g,n[e+3],14,-187363961),m,l,n[e+8],20,1163531501),v=u(v,m=u(m,l=u(l,g,v,m,n[e+13],5,-1444681467),g,v,n[e+2],9,-51403784),l,g,n[e+7],14,1735328473),m,l,n[e+12],20,-1926607734),v=c(v,m=c(m,l=c(l,g,v,m,n[e+5],4,-378558),g,v,n[e+8],11,-2022574463),l,g,n[e+11],16,1839030562),m,l,n[e+14],23,-35309556),v=c(v,m=c(m,l=c(l,g,v,m,n[e+1],4,-1530992060),g,v,n[e+4],11,1272893353),l,g,n[e+7],16,-155497632),m,l,n[e+10],23,-1094730640),v=c(v,m=c(m,l=c(l,g,v,m,n[e+13],4,681279174),g,v,n[e],11,-358537222),l,g,n[e+3],16,-722521979),m,l,n[e+6],23,76029189),v=c(v,m=c(m,l=c(l,g,v,m,n[e+9],4,-640364487),g,v,n[e+12],11,-421815835),l,g,n[e+15],16,530742520),m,l,n[e+2],23,-995338651),v=f(v,m=f(m,l=f(l,g,v,m,n[e],6,-198630844),g,v,n[e+7],10,1126891415),l,g,n[e+14],15,-1416354905),m,l,n[e+5],21,-57434055),v=f(v,m=f(m,l=f(l,g,v,m,n[e+12],6,1700485571),g,v,n[e+3],10,-1894986606),l,g,n[e+10],15,-1051523),m,l,n[e+1],21,-2054922799),v=f(v,m=f(m,l=f(l,g,v,m,n[e+8],6,1873313359),g,v,n[e+15],10,-30611744),l,g,n[e+6],15,-1560198380),m,l,n[e+13],21,1309151649),v=f(v,m=f(m,l=f(l,g,v,m,n[e+4],6,-145523070),g,v,n[e+11],10,-1120210379),l,g,n[e+2],15,718787259),m,l,n[e+9],21,-343485551),l=t(l,i),g=t(g,a),v=t(v,d),m=t(m,h);return[l,g,v,m]}function a(n){var t,r="",e=32*n.length;for(t=0;t<e;t+=8)r+=String.fromCharCode(n[t>>5]>>>t%32&255);return r}function d(n){var t,r=[];for(r[(n.length>>2)-1]=void 0,t=0;t<r.length;t+=1)r[t]=0;var e=8*n.length;for(t=0;t<e;t+=8)r[t>>5]|=(255&n.charCodeAt(t/8))<<t%32;return r}function h(n){return a(i(d(n),8*n.length))}function l(n,t){var r,e,o=d(n),u=[],c=[];for(u[15]=c[15]=void 0,o.length>16&&(o=i(o,8*n.length)),r=0;r<16;r+=1)u[r]=909522486^o[r],c[r]=1549556828^o[r];return e=i(u.concat(d(t)),512+8*t.length),a(i(c.concat(e),640))}function g(n){var t,r,e="";for(r=0;r<n.length;r+=1)t=n.charCodeAt(r),e+="0123456789abcdef".charAt(t>>>4&15)+"0123456789abcdef".charAt(15&t);return e}function v(n){return unescape(encodeURIComponent(n))}function m(n){return h(v(n))}function p(n){return g(m(n))}function s(n,t){return l(v(n),v(t))}function C(n,t){return g(s(n,t))}function A(n,t,r){return t?r?s(t,n):C(t,n):r?m(n):p(n)}"function"==typeof define&&define.amd?define(function(){return A}):"object"==typeof module&&module.exports?module.exports=A:n.md5=A}(this);

    function rot13(inp) {
        return inp.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);});
    }

    function generate_token() {
        var phrase = document.getElementById("phrase").value;
        document.getElementById("token").value = md5(rot13(phrase));
    }

    generate_token();
</script>
EOF;
?>
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# 代码分析

从 GitHub 上引入了个 md5 运算 JS，在前端生成了一个token。

# 漏洞利用

直接输入 success ，提示 token 不对，看一下 F12，猜想是 value 值与 token 值对应

image-20220829161459693

再看看上面的源代码，有一个 generate_token()

尝试先输入 success， 然后再 generate_token()

可见 token 更新成功

image-20220829161808724

提交，搞定：

image-20220829161830273

# Medium

# 源代码

<?php
$page[ 'body' ] .= '<script src="' . DVWA_WEB_PAGE_TO_ROOT . 'vulnerabilities/javascript/source/medium.js"></script>';
?>
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// vulnerabilities/javascript/source/medium.js
function do_something(e){for(var t="",n=e.length-1;n>=0;n--)t+=e[n];return t}setTimeout(function(){do_elsesomething("XX")},300);function do_elsesomething(e){document.getElementById("token").value=do_something(e+document.getElementById("phrase").value+"XX")}
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# 代码分析

思路与 Low 等级基本一致，只是生成 token 的函数放到单独的 js 文件里

看 medium.js，通过 do_something() 函数来更改 token 值

# 漏洞利用

输入 success 然后 Console 执行 do_elsesomething("XX")，然后再提交

image-20220829162411121

# High

# 源代码

<?php
$page[ 'body' ] .= '<script src="' . DVWA_WEB_PAGE_TO_ROOT . 'vulnerabilities/javascript/source/high.js"></script>';
?>
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// vulnerabilities/javascript/source/high.js
var 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1
2

# 代码分析

看起来和 Medium 近似，但是这个 JS 不像是给正常人看的，经过了混淆。

不过可以还原就是了。。

利用：ben-sb/javascript-deobfuscator: General purpose JavaScript deobfuscator (github.com) (opens new window)

得到是人看的代码：

var a = ["fromCharCode", "toString", "replace", "BeJ", "\\w+", "Lyg", "SuR", "(w(){'3M 3L';q 1l='3K 3I 3J T';q 1R=1c 2I==='1n';q Y=1R?2I:{};p(Y.3N){1R=1O}q 2L=!1R&&1c 2M==='1n';q 2o=!Y.2S&&1c 2d==='1n'&&2d.2Q&&2d.2Q.3S;p(2o){Y=3R}z p(2L){Y=2M}q 2G=!Y.3Q&&1c 2g==='1n'&&2g.X;q 2s=1c 2l==='w'&&2l.3P;q 1y=!Y.3H&&1c Z!=='2T';q m='3G'.3z('');q 2w=[-3y,3x,3v,3w];q U=[24,16,8,0];q K=[3A,3B,3F,3E,3D,3C,3T,3U,4d,4c,4b,49,4a,4e,4f,4j,4i,4h,3u,48,47,3Z,3Y,3X,3V,3W,40,41,46,45,43,42,4k,3f,38,36,39,37,34,33,2Y,31,2Z,35,3t,3n,3m,3l,3o,3p,3s,3r,3q,3k,3j,3d,3a,3c,3b,3e,3h,3g,3i,4g];q 1E=['1e','27','1G','2R'];q l=[];p(Y.2S||!1z.1K){1z.1K=w(1x){A 4C.Q.2U.1I(1x)==='[1n 1z]'}}p(1y&&(Y.50||!Z.1N)){Z.1N=w(1x){A 1c 1x==='1n'&&1x.1w&&1x.1w.1J===Z}}q 2m=w(1X,x){A w(s){A O N(x,1d).S(s)[1X]()}};q 2a=w(x){q P=2m('1e',x);p(2o){P=2P(P,x)}P.1T=w(){A O N(x)};P.S=w(s){A P.1T().S(s)};1g(q i=0;i<1E.W;++i){q T=1E[i];P[T]=2m(T,x)}A P};q 2P=w(P,x){q 1S=2O(\"2N('1S')\");q 1Y=2O(\"2N('1w').1Y\");q 2n=x?'1H':'1q';q 2z=w(s){p(1c s==='2p'){A 1S.2x(2n).S(s,'4S').1G('1e')}z{p(s===2q||s===2T){1u O 1t(1l)}z p(s.1J===Z){s=O 2r(s)}}p(1z.1K(s)||Z.1N(s)||s.1J===1Y){A 1S.2x(2n).S(O 1Y(s)).1G('1e')}z{A P(s)}};A 2z};q 2k=w(1X,x){A w(G,s){A O 1P(G,x,1d).S(s)[1X]()}};q 2f=w(x){q P=2k('1e',x);P.1T=w(G){A O 1P(G,x)};P.S=w(G,s){A P.1T(G).S(s)};1g(q i=0;i<1E.W;++i){q T=1E[i];P[T]=2k(T,x)}A P};w N(x,1v){p(1v){l[0]=l[16]=l[1]=l[2]=l[3]=l[4]=l[5]=l[6]=l[7]=l[8]=l[9]=l[10]=l[11]=l[12]=l[13]=l[14]=l[15]=0;k.l=l}z{k.l=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]}p(x){k.C=4I;k.B=4H;k.E=4l;k.F=4U;k.J=4J;k.I=4K;k.H=4L;k.D=4T}z{k.C=4X;k.B=4W;k.E=4Y;k.F=4Z;k.J=4V;k.I=4O;k.H=4F;k.D=4s}k.1C=k.1A=k.L=k.2i=0;k.1U=k.1L=1O;k.2j=1d;k.x=x}N.Q.S=w(s){p(k.1U){A}q 2h,T=1c s;p(T!=='2p'){p(T==='1n'){p(s===2q){1u O 1t(1l)}z p(1y&&s.1J===Z){s=O 2r(s)}z p(!1z.1K(s)){p(!1y||!Z.1N(s)){1u O 1t(1l)}}}z{1u O 1t(1l)}2h=1d}q r,M=0,i,W=s.W,l=k.l;4t(M<W){p(k.1L){k.1L=1O;l[0]=k.1C;l[16]=l[1]=l[2]=l[3]=l[4]=l[5]=l[6]=l[7]=l[8]=l[9]=l[10]=l[11]=l[12]=l[13]=l[14]=l[15]=0}p(2h){1g(i=k.1A;M<W&&i<1k;++M){l[i>>2]|=s[M]<<U[i++&3]}}z{1g(i=k.1A;M<W&&i<1k;++M){r=s.1Q(M);p(r<R){l[i>>2]|=r<<U[i++&3]}z p(r<2v){l[i>>2]|=(2t|(r>>6))<<U[i++&3];l[i>>2]|=(R|(r&V))<<U[i++&3]}z p(r<2A||r>=2E){l[i>>2]|=(2D|(r>>12))<<U[i++&3];l[i>>2]|=(R|((r>>6)&V))<<U[i++&3];l[i>>2]|=(R|(r&V))<<U[i++&3]}z{r=2C+(((r&23)<<10)|(s.1Q(++M)&23));l[i>>2]|=(2X|(r>>18))<<U[i++&3];l[i>>2]|=(R|((r>>12)&V))<<U[i++&3];l[i>>2]|=(R|((r>>6)&V))<<U[i++&3];l[i>>2]|=(R|(r&V))<<U[i++&3]}}}k.2u=i;k.L+=i-k.1A;p(i>=1k){k.1C=l[16];k.1A=i-1k;k.1W();k.1L=1d}z{k.1A=i}}p(k.L>4r){k.2i+=k.L/2H<<0;k.L=k.L%2H}A k};N.Q.1s=w(){p(k.1U){A}k.1U=1d;q l=k.l,i=k.2u;l[16]=k.1C;l[i>>2]|=2w[i&3];k.1C=l[16];p(i>=4q){p(!k.1L){k.1W()}l[0]=k.1C;l[16]=l[1]=l[2]=l[3]=l[4]=l[5]=l[6]=l[7]=l[8]=l[9]=l[10]=l[11]=l[12]=l[13]=l[14]=l[15]=0}l[14]=k.2i<<3|k.L>>>29;l[15]=k.L<<3;k.1W()};N.Q.1W=w(){q a=k.C,b=k.B,c=k.E,d=k.F,e=k.J,f=k.I,g=k.H,h=k.D,l=k.l,j,1a,1b,1j,v,1f,1h,1B,1Z,1V,1D;1g(j=16;j<1k;++j){v=l[j-15];1a=((v>>>7)|(v<<25))^((v>>>18)|(v<<14))^(v>>>3);v=l[j-2];1b=((v>>>17)|(v<<15))^((v>>>19)|(v<<13))^(v>>>10);l[j]=l[j-16]+1a+l[j-7]+1b<<0}1D=b&c;1g(j=0;j<1k;j+=4){p(k.2j){p(k.x){1B=4m;v=l[0]-4n;h=v-4o<<0;d=v+4p<<0}z{1B=4v;v=l[0]-4w;h=v-4G<<0;d=v+4D<<0}k.2j=1O}z{1a=((a>>>2)|(a<<30))^((a>>>13)|(a<<19))^((a>>>22)|(a<<10));1b=((e>>>6)|(e<<26))^((e>>>11)|(e<<21))^((e>>>25)|(e<<7));1B=a&b;1j=1B^(a&c)^1D;1h=(e&f)^(~e&g);v=h+1b+1h+K[j]+l[j];1f=1a+1j;h=d+v<<0;d=v+1f<<0}1a=((d>>>2)|(d<<30))^((d>>>13)|(d<<19))^((d>>>22)|(d<<10));1b=((h>>>6)|(h<<26))^((h>>>11)|(h<<21))^((h>>>25)|(h<<7));1Z=d&a;1j=1Z^(d&b)^1B;1h=(h&e)^(~h&f);v=g+1b+1h+K[j+1]+l[j+1];1f=1a+1j;g=c+v<<0;c=v+1f<<0;1a=((c>>>2)|(c<<30))^((c>>>13)|(c<<19))^((c>>>22)|(c<<10));1b=((g>>>6)|(g<<26))^((g>>>11)|(g<<21))^((g>>>25)|(g<<7));1V=c&d;1j=1V^(c&a)^1Z;1h=(g&h)^(~g&e);v=f+1b+1h+K[j+2]+l[j+2];1f=1a+1j;f=b+v<<0;b=v+1f<<0;1a=((b>>>2)|(b<<30))^((b>>>13)|(b<<19))^((b>>>22)|(b<<10));1b=((f>>>6)|(f<<26))^((f>>>11)|(f<<21))^((f>>>25)|(f<<7));1D=b&c;1j=1D^(b&d)^1V;1h=(f&g)^(~f&h);v=e+1b+1h+K[j+3]+l[j+3];1f=1a+1j;e=a+v<<0;a=v+1f<<0}k.C=k.C+a<<0;k.B=k.B+b<<0;k.E=k.E+c<<0;k.F=k.F+d<<0;k.J=k.J+e<<0;k.I=k.I+f<<0;k.H=k.H+g<<0;k.D=k.D+h<<0};N.Q.1e=w(){k.1s();q C=k.C,B=k.B,E=k.E,F=k.F,J=k.J,I=k.I,H=k.H,D=k.D;q 1e=m[(C>>28)&o]+m[(C>>24)&o]+m[(C>>20)&o]+m[(C>>16)&o]+m[(C>>12)&o]+m[(C>>8)&o]+m[(C>>4)&o]+m[C&o]+m[(B>>28)&o]+m[(B>>24)&o]+m[(B>>20)&o]+m[(B>>16)&o]+m[(B>>12)&o]+m[(B>>8)&o]+m[(B>>4)&o]+m[B&o]+m[(E>>28)&o]+m[(E>>24)&o]+m[(E>>20)&o]+m[(E>>16)&o]+m[(E>>12)&o]+m[(E>>8)&o]+m[(E>>4)&o]+m[E&o]+m[(F>>28)&o]+m[(F>>24)&o]+m[(F>>20)&o]+m[(F>>16)&o]+m[(F>>12)&o]+m[(F>>8)&o]+m[(F>>4)&o]+m[F&o]+m[(J>>28)&o]+m[(J>>24)&o]+m[(J>>20)&o]+m[(J>>16)&o]+m[(J>>12)&o]+m[(J>>8)&o]+m[(J>>4)&o]+m[J&o]+m[(I>>28)&o]+m[(I>>24)&o]+m[(I>>20)&o]+m[(I>>16)&o]+m[(I>>12)&o]+m[(I>>8)&o]+m[(I>>4)&o]+m[I&o]+m[(H>>28)&o]+m[(H>>24)&o]+m[(H>>20)&o]+m[(H>>16)&o]+m[(H>>12)&o]+m[(H>>8)&o]+m[(H>>4)&o]+m[H&o];p(!k.x){1e+=m[(D>>28)&o]+m[(D>>24)&o]+m[(D>>20)&o]+m[(D>>16)&o]+m[(D>>12)&o]+m[(D>>8)&o]+m[(D>>4)&o]+m[D&o]}A 1e};N.Q.2U=N.Q.1e;N.Q.1G=w(){k.1s();q C=k.C,B=k.B,E=k.E,F=k.F,J=k.J,I=k.I,H=k.H,D=k.D;q 2b=[(C>>24)&u,(C>>16)&u,(C>>8)&u,C&u,(B>>24)&u,(B>>16)&u,(B>>8)&u,B&u,(E>>24)&u,(E>>16)&u,(E>>8)&u,E&u,(F>>24)&u,(F>>16)&u,(F>>8)&u,F&u,(J>>24)&u,(J>>16)&u,(J>>8)&u,J&u,(I>>24)&u,(I>>16)&u,(I>>8)&u,I&u,(H>>24)&u,(H>>16)&u,(H>>8)&u,H&u];p(!k.x){2b.4A((D>>24)&u,(D>>16)&u,(D>>8)&u,D&u)}A 2b};N.Q.27=N.Q.1G;N.Q.2R=w(){k.1s();q 1w=O Z(k.x?28:32);q 1i=O 4x(1w);1i.1p(0,k.C);1i.1p(4,k.B);1i.1p(8,k.E);1i.1p(12,k.F);1i.1p(16,k.J);1i.1p(20,k.I);1i.1p(24,k.H);p(!k.x){1i.1p(28,k.D)}A 1w};w 1P(G,x,1v){q i,T=1c G;p(T==='2p'){q L=[],W=G.W,M=0,r;1g(i=0;i<W;++i){r=G.1Q(i);p(r<R){L[M++]=r}z p(r<2v){L[M++]=(2t|(r>>6));L[M++]=(R|(r&V))}z p(r<2A||r>=2E){L[M++]=(2D|(r>>12));L[M++]=(R|((r>>6)&V));L[M++]=(R|(r&V))}z{r=2C+(((r&23)<<10)|(G.1Q(++i)&23));L[M++]=(2X|(r>>18));L[M++]=(R|((r>>12)&V));L[M++]=(R|((r>>6)&V));L[M++]=(R|(r&V))}}G=L}z{p(T==='1n'){p(G===2q){1u O 1t(1l)}z p(1y&&G.1J===Z){G=O 2r(G)}z p(!1z.1K(G)){p(!1y||!Z.1N(G)){1u O 1t(1l)}}}z{1u O 1t(1l)}}p(G.W>1k){G=(O N(x,1d)).S(G).27()}q 1F=[],2e=[];1g(i=0;i<1k;++i){q b=G[i]||0;1F[i]=4z^b;2e[i]=4y^b}N.1I(k,x,1v);k.S(2e);k.1F=1F;k.2c=1d;k.1v=1v}1P.Q=O N();1P.Q.1s=w(){N.Q.1s.1I(k);p(k.2c){k.2c=1O;q 2W=k.27();N.1I(k,k.x,k.1v);k.S(k.1F);k.S(2W);N.Q.1s.1I(k)}};q X=2a();X.1q=X;X.1H=2a(1d);X.1q.2V=2f();X.1H.2V=2f(1d);p(2G){2g.X=X}z{Y.1q=X.1q;Y.1H=X.1H;p(2s){2l(w(){A X})}}})();w 2y(e){1g(q t=\"\",n=e.W-1;n>=0;n--)t+=e[n];A t}w 2J(t,y=\"4B\"){1m.1o(\"1M\").1r=1q(1m.1o(\"1M\").1r+y)}w 2B(e=\"4E\"){1m.1o(\"1M\").1r=1q(e+1m.1o(\"1M\").1r)}w 2K(a,b){1m.1o(\"1M\").1r=2y(1m.1o(\"2F\").1r)}1m.1o(\"2F\").1r=\"\";4u(w(){2B(\"4M\")},4N);1m.1o(\"4P\").4Q(\"4R\",2J);2K(\"3O\",44);", "||||||||||||||||||||this|blocks|HEX_CHARS||0x0F|if|var|code|message||0xFF|t1|function|is224||else|return|h1|h0|h7|h2|h3|key|h6|h5|h4||bytes|index|Sha256|new|method|prototype|0x80|update|type|SHIFT|0x3f|length|exports|root|ArrayBuffer|||||||||||s0|s1|typeof|true|hex|t2|for|ch|dataView|maj|64|ERROR|document|object|getElementById|setUint32|sha256|value|finalize|Error|throw|sharedMemory|buffer|obj|ARRAY_BUFFER|Array|start|ab|block|bc|OUTPUT_TYPES|oKeyPad|digest|sha224|call|constructor|isArray|hashed|token|isView|false|HmacSha256|charCodeAt|WINDOW|crypto|create|finalized|cd|hash|outputType|Buffer|da||||0x3ff||||array|||createMethod|arr|inner|process|iKeyPad|createHmacMethod|module|notString|hBytes|first|createHmacOutputMethod|define|createOutputMethod|algorithm|NODE_JS|string|null|Uint8Array|AMD|0xc0|lastByteIndex|0x800|EXTRA|createHash|do_something|nodeMethod|0xd800|token_part_2|0x10000|0xe0|0xe000|phrase|COMMON_JS|4294967296|window|token_part_3|token_part_1|WEB_WORKER|self|require|eval|nodeWrap|versions|arrayBuffer|JS_SHA256_NO_NODE_JS|undefined|toString|hmac|innerHash|0xf0|0xa2bfe8a1|0xc24b8b70||0xa81a664b||0x92722c85|0x81c2c92e|0xc76c51a3|0x53380d13|0x766a0abb|0x4d2c6dfc|0x650a7354|0x748f82ee|0x84c87814|0x78a5636f|0x682e6ff3|0x8cc70208|0x2e1b2138|0xa4506ceb|0x90befffa|0xbef9a3f7|0x5b9cca4f|0x4ed8aa4a|0x106aa070|0xf40e3585|0xd6990624|0x19a4c116|0x1e376c08|0x391c0cb3|0x34b0bcb5|0x2748774c|0xd192e819|0x0fc19dc6|32768|128|8388608|2147483648|split|0x428a2f98|0x71374491|0x59f111f1|0x3956c25b|0xe9b5dba5|0xb5c0fbcf|0123456789abcdef|JS_SHA256_NO_ARRAY_BUFFER|is|invalid|input|strict|use|JS_SHA256_NO_WINDOW|ABCD|amd|JS_SHA256_NO_COMMON_JS|global|node|0x923f82a4|0xab1c5ed5|0x983e5152|0xa831c66d|0x76f988da|0x5cb0a9dc|0x4a7484aa|0xb00327c8|0xbf597fc7|0x14292967|0x06ca6351||0xd5a79147|0xc6e00bf3|0x2de92c6f|0x240ca1cc|0x550c7dc3|0x72be5d74|0x243185be|0x12835b01|0xd807aa98|0x80deb1fe|0x9bdc06a7|0xc67178f2|0xefbe4786|0xe49b69c1|0xc19bf174|0x27b70a85|0x3070dd17|300032|1413257819|150054599|24177077|56|4294967295|0x5be0cd19|while|setTimeout|704751109|210244248|DataView|0x36|0x5c|push|ZZ|Object|143694565|YY|0x1f83d9ab|1521486534|0x367cd507|0xc1059ed8|0xffc00b31|0x68581511|0x64f98fa7|XX|300|0x9b05688c|send|addEventListener|click|utf8|0xbefa4fa4|0xf70e5939|0x510e527f|0xbb67ae85|0x6a09e667|0x3c6ef372|0xa54ff53a|JS_SHA256_NO_ARRAY_BUFFER_IS_VIEW", "split"];
(function (c, d) {
  var e = function (f) {
    while (--f) {
      c.push(c.shift());
    }
  };
  e(++d);
}(a, 500));
var b = function (c, d) {
  c = c - 0;
  var e = a[c];
  return e;
};
eval(function (d, e, f, g, h, i) {
  h = function (j) {
    return (j < e ? "" : h(parseInt(j / e))) + ((j = j % e) > 35 ? String[b("0x0")](j + 29) : j[b("0x1")](36));
  };
  if (!""[b("0x2")](/^/, String)) {
    while (f--) {
      i[h(f)] = g[f] || h(f);
    }
    g = [function (k) {
      if ("wpA" !== b("0x3")) {
        return i[k];
      } else {
        while (f--) {
          i[k(f)] = g[f] || k(f);
        }
        g = [function (l) {
          return i[l];
        }];
        k = function () {
          return b("0x4");
        };
        f = 1;
      }
    }];
    h = function () {
      return b("0x4");
    };
    f = 1;
  }
  ;
  while (f--) {
    if (g[f]) {
      if (b("0x5") === b("0x6")) {
        return i[h];
      } else {
        d = d[b("0x2")](new RegExp("\\b" + h(f) + "\\b", "g"), g[f]);
      }
    }
  }
  return d;
}(b("0x7"), 62, 311, b("0x8")[b("0x9")]("|"), 0, {}));
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嗯，依然看不懂，那再换一个：Deobfuscate Javascript - Deobfuscate malicious Javascripts for quick and easy analysis (opens new window)

// 前面一堆没用的省略掉。。
function do_something(e) {
    for (var t = "", n = e.length - 1; n >= 0; n--) t += e[n];
    return t
}
function token_part_3(t, y = "ZZ") {
    document.getElementById("token").value = sha256(document.getElementById("token").value + y)
}
function token_part_2(e = "YY") {
    document.getElementById("token").value = sha256(e + document.getElementById("token").value)
}
function token_part_1(a, b) {
    document.getElementById("token").value = do_something(document.getElementById("phrase").value)
}
document.getElementById("phrase").value = "";
setTimeout(function() {
    token_part_2("XX")
}, 300);
document.getElementById("send").addEventListener("click", token_part_3);
token_part_1("ABCD", 44);
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这下能看出点东西了，生成 token 的步骤是：

  • 执行token_part_1("ABCD", 44)
  • 执行token_part_2("XX")(原本是延迟 300ms执行的那个）
  • 点击按钮的时候执行 token_part_3

# 漏洞利用

输入 success ，再到 Console 输入token_part_1("ABCD", 44) 和 token_part_2("XX")，再提交。

image-20220829163512527

# Impossible

你永远不要相信来自用户的任何东西，也无法阻止他们搞破坏，所以没有 Impossible 等级。

image-20220829163615309

Last Updated: 2023/1/12 04:11:40