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authorJack <66967891+ASpoonPlaysGames@users.noreply.github.com>2023-12-27 00:32:01 +0000
committerGitHub <noreply@github.com>2023-12-27 01:32:01 +0100
commitf5ab6fb5e8be7b73e6003d4145081d5e0c0ce287 (patch)
tree90f2c6a4885dbd181799e2325cf33588697674e1 /NorthstarDLL/shared/exploit_fixes/exploitfixes_utf8parser.cpp
parentbb8ed59f6891b1196c5f5bbe7346cd171c8215fa (diff)
downloadNorthstarLauncher-f5ab6fb5e8be7b73e6003d4145081d5e0c0ce287.tar.gz
NorthstarLauncher-f5ab6fb5e8be7b73e6003d4145081d5e0c0ce287.zip
Folder restructuring from primedev (#624)v1.21.2-rc3v1.21.2
Copies of over the primedev folder structure for easier cherry-picking of further changes Co-authored-by: F1F7Y <filip.bartos07@proton.me>
Diffstat (limited to 'NorthstarDLL/shared/exploit_fixes/exploitfixes_utf8parser.cpp')
-rw-r--r--NorthstarDLL/shared/exploit_fixes/exploitfixes_utf8parser.cpp199
1 files changed, 0 insertions, 199 deletions
diff --git a/NorthstarDLL/shared/exploit_fixes/exploitfixes_utf8parser.cpp b/NorthstarDLL/shared/exploit_fixes/exploitfixes_utf8parser.cpp
deleted file mode 100644
index 3d97f750..00000000
--- a/NorthstarDLL/shared/exploit_fixes/exploitfixes_utf8parser.cpp
+++ /dev/null
@@ -1,199 +0,0 @@
-
-AUTOHOOK_INIT()
-
-INT64(__fastcall* sub_F1320)(DWORD a1, char* a2);
-
-// Reimplementation of an exploitable UTF decoding function in titanfall
-bool __fastcall CheckUTF8Valid(INT64* a1, DWORD* a2, char* strData)
-{
- 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 (!CMemoryAddress(v4).IsMemoryReadable(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;
-}
-
-// prevent utf8 parser from crashing when provided bad data, which can be sent through user-controlled openinvites
-// clang-format off
-AUTOHOOK(Rson_ParseUTF8, engine.dll + 0xEF670,
-bool, __fastcall, (INT64* a1, DWORD* a2, char* strData)) // 48 89 5C 24 ? 48 89 6C 24 ? 48 89 74 24 ? 57 41 54 41 55 41 56 41 57 48 83 EC 20 8B 1A
-// clang-format on
-{
- static void* targetRetAddr = CModule("engine.dll").FindPattern("84 C0 75 2C 49 8B 16");
-
- // only call if we're parsing utf8 data from the network (i.e. communities), otherwise we get perf issues
- void* pReturnAddress =
-#ifdef _MSC_VER
- _ReturnAddress()
-#else
- __builtin_return_address(0)
-#endif
- ;
-
- if (pReturnAddress == targetRetAddr && !CheckUTF8Valid(a1, a2, strData))
- return false;
-
- return Rson_ParseUTF8(a1, a2, strData);
-}
-
-ON_DLL_LOAD("engine.dll", EngineExploitFixes_UTF8Parser, (CModule module))
-{
- AUTOHOOK_DISPATCH()
-
- sub_F1320 = module.FindPattern("83 F9 7F 77 08 88 0A").RCast<INT64(__fastcall*)(DWORD, char*)>();
-}