mirror of
https://github.com/volatilityfoundation/volatility3.git
synced 2026-09-10 19:57:39 +02:00
ikelos
@@ -1,12 +1,121 @@
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from volatility3.plugins.linux import envvars
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# This file is Copyright 2022 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 volatility3.framework import exceptions, renderers
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from volatility3.framework.configuration import requirements
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from volatility3.framework.interfaces import plugins
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from volatility3.framework.objects import utility
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from volatility3.plugins.linux import pslist
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vollog = logging.getLogger(__name__)
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class Envars(envvars.Envvars):
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def run(self, *args, **kwargs):
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vollog.warning(
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"The linux.envars plugin has been renamed to linux.envvars and will only be accessible through the new name in a future release"
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class Envars(plugins.PluginInterface):
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"""Lists processes with their environment variables"""
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_required_framework_version = (2, 0, 0)
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@classmethod
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def get_requirements(cls):
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# Since we're calling the plugin, make sure we have the plugin's requirements
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return [
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requirements.ModuleRequirement(
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name="kernel",
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description="Linux kernel",
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architectures=["Intel32", "Intel64"],
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),
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requirements.PluginRequirement(
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name="pslist", plugin=pslist.PsList, version=(2, 0, 0)
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),
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requirements.ListRequirement(
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name="pid",
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description="Filter on specific process IDs",
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element_type=int,
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optional=True,
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),
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]
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def _generator(self, tasks):
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"""Generates a listing of processes along with environment variables"""
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# walk the process list and return the envars
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for task in tasks:
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pid = task.pid
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# get process name as string
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name = utility.array_to_string(task.comm)
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# try and get task parent
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try:
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ppid = task.parent.pid
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except exceptions.InvalidAddressException:
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vollog.debug(
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f"Unable to read parent pid for task {pid} {name}, setting ppid to 0."
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)
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ppid = 0
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# kernel threads never have an mm as they do not have userland mappings
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try:
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mm = task.mm
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except exceptions.InvalidAddressException:
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# no mm so cannot get envars
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vollog.debug(
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f"Unable to access mm for task {pid} {name} it is likely a kernel thread, will not extract any envars."
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)
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mm = None
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continue
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# if mm exists attempt to get envars
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if mm:
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# get process layer to read envars from
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proc_layer_name = task.add_process_layer()
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if proc_layer_name is None:
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vollog.debug(
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f"Unable to construct process layer for task {pid} {name}, will not extract any envars."
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)
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continue
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proc_layer = self.context.layers[proc_layer_name]
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# get the size of the envars with sanity checking
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envars_size = task.mm.env_end - task.mm.env_start
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if not (0 < envars_size <= 8192):
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vollog.debug(
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f"Task {pid} {name} appears to have envars of size {envars_size} bytes which fails the sanity checking, will not extract any envars."
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)
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continue
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# attempt to read all envars data
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try:
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envar_data = proc_layer.read(task.mm.env_start, envars_size)
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except exceptions.InvalidAddressException:
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vollog.debug(
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f"Unable to read full envars for {pid} {name} starting at virtual offset {hex(task.mm.env_start)} for {envars_size} bytes, will not extract any envars."
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)
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continue
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# parse envar data, envars are null terminated, keys and values are separated by '='
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envar_data = envar_data.rstrip(b"\x00")
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for envar_pair in envar_data.split(b"\x00"):
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try:
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key, value = envar_pair.decode().split("=", 1)
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except ValueError:
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vollog.debug(
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f"Unable to extract envars for {pid} {name} starting at virtual offset {hex(task.mm.env_start)}, they don't appear to be '=' separated"
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)
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continue
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yield (0, (pid, ppid, name, key, value))
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def run(self):
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filter_func = pslist.PsList.create_pid_filter(self.config.get("pid", None))
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return renderers.TreeGrid(
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[("PID", int), ("PPID", int), ("COMM", str), ("KEY", str), ("VALUE", str)],
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self._generator(
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pslist.PsList.list_tasks(
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self.context, self.config["kernel"], filter_func=filter_func
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)
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),
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)
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return super().run(*args, **kwargs)
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@@ -1,121 +0,0 @@
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# This file is Copyright 2022 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 volatility3.framework import exceptions, renderers
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from volatility3.framework.configuration import requirements
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from volatility3.framework.interfaces import plugins
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from volatility3.framework.objects import utility
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from volatility3.plugins.linux import pslist
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vollog = logging.getLogger(__name__)
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class Envvars(plugins.PluginInterface):
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"""Lists processes with their environment variables"""
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_required_framework_version = (2, 0, 0)
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@classmethod
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def get_requirements(cls):
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# Since we're calling the plugin, make sure we have the plugin's requirements
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return [
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requirements.ModuleRequirement(
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name="kernel",
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description="Linux kernel",
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architectures=["Intel32", "Intel64"],
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),
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requirements.PluginRequirement(
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name="pslist", plugin=pslist.PsList, version=(2, 0, 0)
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),
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requirements.ListRequirement(
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name="pid",
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description="Filter on specific process IDs",
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element_type=int,
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optional=True,
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),
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]
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def _generator(self, tasks):
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"""Generates a listing of processes along with environment variables"""
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# walk the process list and return the envars
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for task in tasks:
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pid = task.pid
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# get process name as string
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name = utility.array_to_string(task.comm)
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# try and get task parent
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try:
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ppid = task.parent.pid
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except exceptions.InvalidAddressException:
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vollog.debug(
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f"Unable to read parent pid for task {pid} {name}, setting ppid to 0."
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)
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ppid = 0
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# kernel threads never have an mm as they do not have userland mappings
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try:
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mm = task.mm
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except exceptions.InvalidAddressException:
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# no mm so cannot get envars
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vollog.debug(
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f"Unable to access mm for task {pid} {name} it is likely a kernel thread, will not extract any envars."
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)
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mm = None
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continue
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# if mm exists attempt to get envars
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if mm:
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# get process layer to read envars from
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proc_layer_name = task.add_process_layer()
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if proc_layer_name is None:
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vollog.debug(
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f"Unable to construct process layer for task {pid} {name}, will not extract any envars."
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)
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continue
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proc_layer = self.context.layers[proc_layer_name]
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# get the size of the envars with sanity checking
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envars_size = task.mm.env_end - task.mm.env_start
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if not (0 < envars_size <= 8192):
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vollog.debug(
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f"Task {pid} {name} appears to have envars of size {envars_size} bytes which fails the sanity checking, will not extract any envars."
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)
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continue
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# attempt to read all envars data
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try:
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envar_data = proc_layer.read(task.mm.env_start, envars_size)
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except exceptions.InvalidAddressException:
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vollog.debug(
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f"Unable to read full envars for {pid} {name} starting at virtual offset {hex(task.mm.env_start)} for {envars_size} bytes, will not extract any envars."
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)
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continue
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# parse envar data, envars are null terminated, keys and values are separated by '='
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envar_data = envar_data.rstrip(b"\x00")
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for envar_pair in envar_data.split(b"\x00"):
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try:
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key, value = envar_pair.decode().split("=", 1)
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except ValueError:
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vollog.debug(
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f"Unable to extract envars for {pid} {name} starting at virtual offset {hex(task.mm.env_start)}, they don't appear to be '=' separated"
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)
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continue
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yield (0, (pid, ppid, name, key, value))
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def run(self):
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filter_func = pslist.PsList.create_pid_filter(self.config.get("pid", None))
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return renderers.TreeGrid(
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[("PID", int), ("PPID", int), ("COMM", str), ("KEY", str), ("VALUE", str)],
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self._generator(
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pslist.PsList.list_tasks(
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self.context, self.config["kernel"], filter_func=filter_func
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)
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),
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)
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