From abfe104eb96e5ddd4a07e7a7a4dd5073fc88e5d0 Mon Sep 17 00:00:00 2001 From: Eve Date: Wed, 8 Mar 2023 14:02:13 +0000 Subject: [PATCH] Fix linux.pscan to find memory layer to scan using kernel layers dependencies rather than hard coded value. --- volatility3/framework/plugins/linux/psscan.py | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/volatility3/framework/plugins/linux/psscan.py b/volatility3/framework/plugins/linux/psscan.py index 7cf0aa631..e8cc17a40 100644 --- a/volatility3/framework/plugins/linux/psscan.py +++ b/volatility3/framework/plugins/linux/psscan.py @@ -6,7 +6,7 @@ from typing import Iterable, List, Tuple import struct from enum import Enum -from volatility3.framework import renderers, interfaces, symbols, constants +from volatility3.framework import renderers, interfaces, symbols, constants, exceptions from volatility3.framework.configuration import requirements from volatility3.framework.objects import utility from volatility3.framework.layers import scanners @@ -122,8 +122,20 @@ class PsScan(interfaces.plugins.PluginInterface): # append to needles list the packed hex for searching needles.append(packed_addr) + # find the memory layer to scan + if len(kernel_layer.dependencies) > 1: + vollog.warning( + f"Kernel layer depends on multiple layers however only {kernel_layer.dependencies[0]} will be scanned by this plugin." + ) + elif len(kernel_layer.dependencies) == 0: + vollog.error( + f"Kernel layer has no dependencies, meaning there is no memory layer for this plugin to scan." + ) + raise exceptions.LayerException(kernel_layer_name, f"Layer {kernel_layer_name} has no dependencies") + + memory_layer = context.layers[kernel_layer.dependencies[0]] + # scan the memory_layer for these needles - memory_layer = context.layers["memory_layer"] for address, _ in memory_layer.scan( context, scanners.MultiStringScanner(needles) ):