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84 lines
3.3 KiB
Python
84 lines
3.3 KiB
Python
# This file is Copyright 2020 Volatility Foundation and licensed under the Volatility Software License 1.0
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# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
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#
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import logging
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from typing import List
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from volatility.framework import interfaces, renderers, exceptions, constants, contexts
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from volatility.framework.automagic import linux
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from volatility.framework.configuration import requirements
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from volatility.framework.interfaces import plugins
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from volatility.framework.objects import utility
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from volatility.plugins.linux import lsmod
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from volatility.framework.renderers import format_hints
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vollog = logging.getLogger(__name__)
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class tty_check(plugins.PluginInterface):
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"""Compares module list to sysfs info, if available"""
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@classmethod
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def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
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return [
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requirements.TranslationLayerRequirement(name='primary',
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description='Memory layer for the kernel',
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architectures=["Intel32", "Intel64"]),
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requirements.SymbolTableRequirement(
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name="vmlinux", description="Linux kernel symbols"),
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requirements.PluginRequirement(
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name='lsmod', plugin=lsmod.Lsmod, version=(1, 0, 0))
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]
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def _generator(self):
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vmlinux = contexts.Module(
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self.context, self.config['vmlinux'], self.config['primary'], 0)
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modules = lsmod.Lsmod.list_modules(self.context, self.config['primary'], self.config['vmlinux'])
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handles = linux.LinuxUtilities.generate_kernel_handler_info(self.context, self.config['primary'], vmlinux, modules)
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try:
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tty_drivers = vmlinux.object_from_symbol("tty_drivers")
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except exceptions.SymbolError:
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tty_drivers = None
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if not tty_drivers:
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raise TypeError(
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"This plugin requires the tty_drivers structure."
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"This structure is not present in the supplied symbol table."
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"This means you are either analyzing an unsupported kernel version or that your symbol table is corrupt."
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)
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sym_cache = {}
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for tty in tty_drivers.to_list(vmlinux.name + constants.BANG + "tty_driver", "tty_drivers"):
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try:
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ttys = utility.array_of_pointers(tty.ttys.dereference(), count=tty.num, subtype=vmlinux.name + constants.BANG + "tty_struct", context=self.context)
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except exceptions.PagedInvalidAddressException:
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continue
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for tty_dev in ttys:
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if tty_dev == 0:
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continue
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name = utility.array_to_string(tty_dev.name)
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recv_buf = tty_dev.ldisc.ops.receive_buf
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module_name, symbol_name = linux.LinuxUtilities.lookup_module_address(self.context, handles, recv_buf)
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sym_cache[recv_buf] = symbol_name
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yield (0, (name, format_hints.Hex(recv_buf), module_name, symbol_name))
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def run(self):
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return renderers.TreeGrid([("Name", str), ("Address", format_hints.Hex), ("Module", str),
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("Symbol", str)], self._generator())
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