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Merge branch 'GP-5009_ryanmkurtz_ControlFlowGuard' into patch

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(Closes #6960)
This commit is contained in:
Ryan Kurtz 2024-10-11 06:22:44 -04:00
commit c8703a10d8
2 changed files with 60 additions and 163 deletions
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217
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/ControlFlowGuard.java
View File

@ -4,9 +4,9 @@
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@ -17,6 +17,7 @@ package ghidra.app.util.bin.format.pe;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Supplier;
import ghidra.app.cmd.data.CreateArrayCmd;
import ghidra.app.util.bin.format.pe.LoadConfigDirectory.GuardFlags;
@ -30,7 +31,6 @@ import ghidra.program.model.mem.Memory;
import ghidra.program.model.mem.MemoryAccessException;
import ghidra.program.model.symbol.SourceType;
import ghidra.program.model.symbol.SymbolTable;
import ghidra.util.Msg;
import ghidra.util.exception.InvalidInputException;
/**
@ -57,82 +57,21 @@ public class ControlFlowGuard {
public static void markup(LoadConfigDirectory lcd, Program program, MessageLog log,
NTHeader ntHeader) {
boolean is64bit = ntHeader.getOptionalHeader().is64bit();
AddressSpace space = program.getAddressFactory().getDefaultAddressSpace();
Memory mem = program.getMemory();
SymbolTable symbolTable = program.getSymbolTable();
// ControlFlowGuard
markupCfgCheckFunction(lcd, program, is64bit, space, mem, symbolTable);
markupCfgDispatchFunction(lcd, program, is64bit, space, mem, symbolTable);
markupCfgFunction("_guard_check_icall", "ControlFlowGuard check",
lcd::getCfgCheckFunctionPointer, program, ntHeader, log);
markupCfgFunction("_guard_dispatch_icall", "ControlFlowGuard dispatch",
lcd::getCfgDispatchFunctionPointer, program, ntHeader, log);
markupCfgFunctionTable(lcd, program, log);
markupCfgAddressTakenIatEntryTable(lcd, program, log);
// ReturnFlowGuard
markupRfgFailureRoutine(lcd, program, space, symbolTable);
markupRfgDefaultFailureRoutine(lcd, program, is64bit, space, mem, symbolTable);
markupRfgDefaultStackPointerFunction(lcd, program, is64bit, space, mem, symbolTable);
}
/**
* Performs markup on the ControlFlowGuard check function, if it exists.
*
* @param lcd The PE LoadConfigDirectory.
* @param program The program.
* @param is64bit True if the PE is 64-bit; false if it's 32-bit.
* @param space The program's address space.
* @param mem The program's memory.
* @param symbolTable The program's symbol table.
*/
private static void markupCfgCheckFunction(LoadConfigDirectory lcd, Program program,
boolean is64bit, AddressSpace space, Memory mem, SymbolTable symbolTable) {
if (lcd.getCfgCheckFunctionPointer() == 0) {
return;
}
try {
Address functionPointerAddr = space.getAddress(lcd.getCfgCheckFunctionPointer());
Address functionAddr = space.getAddress(
is64bit ? mem.getLong(functionPointerAddr) : mem.getInt(functionPointerAddr));
symbolTable.createLabel(functionAddr, "_guard_check_icall", SourceType.IMPORTED);
AbstractProgramLoader.markAsFunction(program, null, functionAddr);
}
catch (MemoryAccessException | AddressOutOfBoundsException | InvalidInputException e) {
Msg.warn(ControlFlowGuard.class, "Unable to label ControlFlowGuard check function.", e);
}
}
/**
* Performs markup on the ControlFlowGuard dispatch function, if it exists.
*
* @param lcd The PE LoadConfigDirectory.
* @param program The program.
* @param is64bit True if the PE is 64-bit; false if it's 32-bit.
* @param space The program's address space.
* @param mem The program's memory.
* @param symbolTable The program's symbol table.
*/
private static void markupCfgDispatchFunction(LoadConfigDirectory lcd, Program program,
boolean is64bit, AddressSpace space, Memory mem, SymbolTable symbolTable) {
if (lcd.getCfgDispatchFunctionPointer() == 0) {
return;
}
try {
Address functionPointerAddr = space.getAddress(lcd.getCfgDispatchFunctionPointer());
Address functionAddr = space.getAddress(
is64bit ? mem.getLong(functionPointerAddr) : mem.getInt(functionPointerAddr));
symbolTable.createLabel(functionAddr, "_guard_dispatch_icall", SourceType.IMPORTED);
AbstractProgramLoader.markAsFunction(program, null, functionAddr);
}
catch (MemoryAccessException | AddressOutOfBoundsException | InvalidInputException e) {
Msg.warn(ControlFlowGuard.class, "Unable to label ControlFlowGuard dispatch function.",
e);
}
markupCfgFunction("_guard_ss_verify_failure", "ReturnFlowGuard failure",
lcd::getRfgFailureRoutine, program, ntHeader, log);
markupCfgFunction("_guard_ss_verify_failure_default", "ReturnFlowGuard default failure",
lcd::getRfgFailureRoutineFunctionPointer, program, ntHeader, log);
markupCfgFunction("_guard_ss_verify_sp_default", "ReturnFlowGuard verify stack pointer",
lcd::getRfgVerifyStackPointerFunctionPointer, program, ntHeader, log);
}
/**
@ -164,7 +103,7 @@ public class ControlFlowGuard {
.createLabel(tableAddr, GuardCFFunctionTableName, SourceType.IMPORTED);
}
catch (InvalidInputException e) {
Msg.warn(ControlFlowGuard.class, "Unable to label ControlFlowGuard function table.", e);
log.appendMsg("Unable to label ControlFlowGuard function table: " + e.getMessage());
}
// Each table entry is an RVA (32-bit image base offset), followed by 'n' extra bytes
@ -201,12 +140,12 @@ public class ControlFlowGuard {
private static void createCfgFunctions(Program program, Data tableData, MessageLog log) {
if (tableData == null) {
Msg.warn(ControlFlowGuard.class, "Couldn't find Control Flow Guard tables.");
log.appendMsg("Couldn't find Control Flow Guard tables.");
return;
}
if (!tableData.isArray() || (tableData.getNumComponents() < 1)) {
Msg.warn(ControlFlowGuard.class, "Control Flow Guard table seems to be empty.");
log.appendMsg("Control Flow Guard table seems to be empty.");
return;
}
@ -223,8 +162,8 @@ public class ControlFlowGuard {
Data entry = table.getComponent(i);
Data iboData = entry.getComponent(0);
Object value = iboData.getValue();
if (value instanceof Address) {
list.add((Address) value);
if (value instanceof Address addr) {
list.add(addr);
}
}
return list;
@ -266,102 +205,62 @@ public class ControlFlowGuard {
}
}
catch (AddressOutOfBoundsException | InvalidInputException e) {
Msg.warn(ControlFlowGuard.class, "Unable to label ControlFlowGuard IAT table.", e);
log.appendMsg("Unable to label ControlFlowGuard IAT table: " + e.getMessage());
}
}
/**
* Performs markup on the ReturnFlowGuard failure routine, if it exists.
* Performs markup on a ControlFlowGuard function, if it exists.
*
* @param lcd The PE LoadConfigDirectory.
* @param program The program
* @param space The program's address space.
* @param symbolTable The program's symbol table.
* @param label The ControFlowGuard label to create.
* @param description A short description of the ControlFlowGuard function type.
* @param functionPointerGetter A method that returns the ControlFlowGuard function's pointer
* address.
* @param program The program.
* @param ntHeader The PE NTHeader.
* @param log The log.
*/
private static void markupRfgFailureRoutine(LoadConfigDirectory lcd, Program program,
AddressSpace space, SymbolTable symbolTable) {
private static void markupCfgFunction(String label, String description,
Supplier<Long> functionPointerGetter, Program program, NTHeader ntHeader,
MessageLog log) {
if (functionPointerGetter.get() == 0) {
return;
}
if (lcd.getRfgFailureRoutine() == 0) {
AddressSpace space = program.getAddressFactory().getDefaultAddressSpace();
Memory mem = program.getMemory();
SymbolTable symbolTable = program.getSymbolTable();
boolean is64bit = ntHeader.getOptionalHeader().is64bit();
Address functionPointerAddr = space.getAddress(functionPointerGetter.get());
PeUtils.createData(program, functionPointerAddr, PointerDataType.dataType, log);
Address functionAddr;
try {
functionAddr = space.getAddress(
is64bit ? mem.getLong(functionPointerAddr) : mem.getInt(functionPointerAddr));
}
catch (MemoryAccessException e) {
log.appendMsg("Failed to read %s function pointer address at %s".formatted(description,
functionPointerAddr));
return;
}
try {
Address routineAddr = space.getAddress(lcd.getRfgFailureRoutine());
symbolTable.createLabel(routineAddr, "_guard_ss_verify_failure", SourceType.IMPORTED);
AbstractProgramLoader.markAsFunction(program, null, routineAddr);
symbolTable.createLabel(functionAddr, label, SourceType.IMPORTED);
}
catch (AddressOutOfBoundsException | InvalidInputException e) {
Msg.warn(ControlFlowGuard.class, "Unable to label ReturnFlowGuard failure routine.", e);
log.appendMsg("Unable to apply label '%s' to %s function at %s: %s".formatted(label,
description, functionAddr, e.getMessage()));
}
}
/**
* Performs markup on the ReturnFlowGuard "default" failure routine function, if it exists.
*
* @param lcd The PE LoadConfigDirectory.
* @param program The program
* @param is64bit True if the PE is 64-bit; false if it's 32-bit.
* @param space The program's address space.
* @param mem The program's memory.
* @param symbolTable The program's symbol table.
*/
private static void markupRfgDefaultFailureRoutine(LoadConfigDirectory lcd, Program program,
boolean is64bit, AddressSpace space, Memory mem, SymbolTable symbolTable) {
if (lcd.getRfgFailureRoutineFunctionPointer() == 0) {
return;
}
try {
Address functionPointerAddr =
space.getAddress(lcd.getRfgFailureRoutineFunctionPointer());
Address functionAddr = space.getAddress(
is64bit ? mem.getLong(functionPointerAddr) : mem.getInt(functionPointerAddr));
symbolTable.createLabel(functionAddr, "_guard_ss_verify_failure_default",
SourceType.IMPORTED);
if (program.getListing().getDefinedDataAt(functionAddr) == null) {
AbstractProgramLoader.markAsFunction(program, null, functionAddr);
}
catch (MemoryAccessException | AddressOutOfBoundsException | InvalidInputException e) {
Msg.warn(ControlFlowGuard.class,
"Unable to label ReturnFlowGuard default failure routine.", e);
}
}
/**
* Performs markup on the ReturnFlowGuard verify stack pointer function, if it exists.
*
* @param lcd The PE LoadConfigDirectory.
* @param program The program
* @param is64bit True if the PE is 64-bit; false if it's 32-bit.
* @param space The program's address space.
* @param mem The program's memory.
* @param symbolTable The program's symbol table.
*/
private static void markupRfgDefaultStackPointerFunction(LoadConfigDirectory lcd,
Program program, boolean is64bit, AddressSpace space, Memory mem,
SymbolTable symbolTable) {
if (lcd.getRfgVerifyStackPointerFunctionPointer() == 0) {
return;
}
try {
Address functionPointerAddr =
space.getAddress(lcd.getRfgVerifyStackPointerFunctionPointer());
Address functionAddr = space.getAddress(
is64bit ? mem.getLong(functionPointerAddr) : mem.getInt(functionPointerAddr));
symbolTable.createLabel(functionAddr, "_guard_ss_verify_sp_default",
SourceType.IMPORTED);
AbstractProgramLoader.markAsFunction(program, null, functionAddr);
}
catch (MemoryAccessException | AddressOutOfBoundsException | InvalidInputException e) {
Msg.warn(ControlFlowGuard.class,
"Unable to label ReturnFlowGuard verify stack pointer function.", e);
else {
log.appendMsg("Unable to mark %s as function at %s. Data is already defined there."
.formatted(description, functionAddr));
}
}
}

6
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/PeLoader.java
View File

@ -4,9 +4,9 @@
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@ -433,8 +433,6 @@ public class PeLoader extends AbstractPeDebugLoader {
return;
}
log.appendMsg("Delay imports detected");
AddressSpace space = program.getAddressFactory().getDefaultAddressSpace();
Listing listing = program.getListing();
ReferenceManager refManager = program.getReferenceManager();