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author | Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com> | 2022-03-24 00:55:20 +0100 |
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committer | GitHub <noreply@github.com> | 2022-03-24 00:55:20 +0100 |
commit | b5405b462656b83a37bf1eb41b049b0913980a13 (patch) | |
tree | b9e48626b49782161ddaff84ae257bfece72c257 /NorthstarDedicatedTest/ExploitFixes_UTF8Parser.h | |
parent | 178f1deca8fe94167307e1717cee7250a3f3b8b4 (diff) | |
parent | de7deafc7e6ba53deec8dd3c05d2ea5e7cf42264 (diff) | |
download | NorthstarLauncher-b5405b462656b83a37bf1eb41b049b0913980a13.tar.gz NorthstarLauncher-b5405b462656b83a37bf1eb41b049b0913980a13.zip |
Merge branch 'main' into NetCon
Diffstat (limited to 'NorthstarDedicatedTest/ExploitFixes_UTF8Parser.h')
-rw-r--r-- | NorthstarDedicatedTest/ExploitFixes_UTF8Parser.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/NorthstarDedicatedTest/ExploitFixes_UTF8Parser.h b/NorthstarDedicatedTest/ExploitFixes_UTF8Parser.h new file mode 100644 index 00000000..6b767a0c --- /dev/null +++ b/NorthstarDedicatedTest/ExploitFixes_UTF8Parser.h @@ -0,0 +1,175 @@ +// Reimplementation of a exploitable UTF decoding function in titanfall + +#include "NSMem.h" + +#pragma once + +namespace ExploitFixes_UTF8Parser +{ + bool __fastcall CheckValid(INT64* a1, DWORD* a2, char* strData) + { + static auto sub_F1320 = (INT64(__fastcall*)(DWORD a1, char* a2)) NSMem::PatternScan("engine.dll", "83 F9 7F 77 08 88 0A"); + + DWORD v3; // eax + char* v4; // rbx + char v5; // si + char* _strData; // rdi + char* v7; // rbp + char v11; // al + DWORD v12; // er9 + DWORD v13; // ecx + DWORD v14; // edx + DWORD v15; // er8 + int v16; // eax + DWORD v17; // er9 + int v18; // eax + DWORD v19; // er9 + DWORD v20; // ecx + int v21; // eax + int v22; // er9 + DWORD v23; // edx + int v24; // eax + int v25; // er9 + DWORD v26; // er9 + DWORD v27; // er10 + DWORD v28; // ecx + DWORD v29; // edx + DWORD v30; // er8 + int v31; // eax + DWORD v32; // er10 + int v33; // eax + DWORD v34; // er10 + DWORD v35; // ecx + int v36; // eax + int v37; // er10 + DWORD v38; // edx + int v39; // eax + int v40; // er10 + DWORD v41; // er10 + INT64 v43; // r8 + INT64 v44; // rdx + INT64 v45; // rcx + INT64 v46; // rax + INT64 v47; // rax + char v48; // al + INT64 v49; // r8 + INT64 v50; // rdx + INT64 v51; // rcx + INT64 v52; // rax + INT64 v53; // rax + + v3 = a2[2]; + v4 = (char*)(a1[1] + *a2); + v5 = 0; + _strData = strData; + v7 = &v4[*((UINT16*)a2 + 2)]; + if (v3 >= 2) + { + ++v4; + --v7; + if (v3 != 2) + { + while (1) + { + + if (!NSMem::IsMemoryReadable(v4, 1)) + return false; // INVALID + + v11 = *v4++; // crash potential + if (v11 != 92) + goto LABEL_6; + v11 = *v4++; + if (v11 == 110) + break; + switch (v11) + { + case 't': + v11 = 9; + goto LABEL_6; + case 'r': + v11 = 13; + goto LABEL_6; + case 'b': + v11 = 8; + goto LABEL_6; + case 'f': + v11 = 12; + goto LABEL_6; + } + if (v11 != 117) + goto LABEL_6; + v12 = *v4 | 0x20; + v13 = v4[1] | 0x20; + v14 = v4[2] | 0x20; + v15 = v4[3] | 0x20; + v16 = 87; + if (v12 <= 0x39) + v16 = 48; + v17 = v12 - v16; + v18 = 87; + v19 = v17 << 12; + if (v13 <= 0x39) + v18 = 48; + v20 = v13 - v18; + v21 = 87; + v22 = (v20 << 8) | v19; + if (v14 <= 0x39) + v21 = 48; + v23 = v14 - v21; + v24 = 87; + v25 = (16 * v23) | v22; + if (v15 <= 0x39) + v24 = 48; + v4 += 4; + v26 = (v15 - v24) | v25; + if (v26 - 55296 <= 0x7FF) + { + if (v26 >= 0xDC00) + return true; + if (*v4 != 92 || v4[1] != 117) + return true; + + v27 = v4[2] | 0x20; + v28 = v4[3] | 0x20; + v29 = v4[4] | 0x20; + v30 = v4[5] | 0x20; + v31 = 87; + if (v27 <= 0x39) + v31 = 48; + v32 = v27 - v31; + v33 = 87; + v34 = v32 << 12; + if (v28 <= 0x39) + v33 = 48; + v35 = v28 - v33; + v36 = 87; + v37 = (v35 << 8) | v34; + if (v29 <= 0x39) + v36 = 48; + v38 = v29 - v36; + v39 = 87; + v40 = (16 * v38) | v37; + if (v30 <= 0x39) + v39 = 48; + v4 += 6; + v41 = ((v30 - v39) | v40) - 56320; + if (v41 > 0x3FF) + return true; + v26 = v41 | ((v26 - 55296) << 10); + } + _strData += (DWORD)sub_F1320(v26, _strData); + LABEL_7: + if (v4 == v7) + goto LABEL_48; + } + v11 = 10; + LABEL_6: + v5 |= v11; + *_strData++ = v11; + goto LABEL_7; + } + } + LABEL_48: + return true; + } +}
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