Update the KSPP recommendations

[kconfig-hardened-check.git] / kernel_hardening_checker / config_files / kspp-recommendations / kspp-kconfig-x86-64.config

diff --git a/kernel_hardening_checker/config_files/kspp-recommendations/kspp-kconfig-x86-64.config b/kernel_hardening_checker/config_files/kspp-recommendations/kspp-kconfig-x86-64.config
index f179b4ead38def7c6cea7ce3ed5aa512f2c1d4fb..cd9afbdf1c2f560c9c0d74d638667c217d7e599d 100644 (file)
--- a/kernel_hardening_checker/config_files/kspp-recommendations/kspp-kconfig-x86-64.config
+++ b/kernel_hardening_checker/config_files/kspp-recommendations/kspp-kconfig-x86-64.config
@@ -1,4 +1,4 @@
-# Linux/x86_64 6.1.5 Kernel Configuration
+# Linux/x86_64 6.6.7 Kernel Configuration
 
 # Report BUG() conditions and kill the offending process.
 CONFIG_BUG=y
@@ -25,6 +25,7 @@ CONFIG_IO_STRICT_DEVMEM=y
 CONFIG_SYN_COOKIES=y
 
 # Perform additional validation of various commonly targeted structures.
+CONFIG_LIST_HARDENED=y
 CONFIG_DEBUG_CREDENTIALS=y
 CONFIG_DEBUG_NOTIFIERS=y
 CONFIG_DEBUG_LIST=y
@@ -52,6 +53,7 @@ CONFIG_SECURITY_LANDLOCK=y
 # Make sure SELinux cannot be disabled trivially.
 # CONFIG_SECURITY_SELINUX_BOOTPARAM is not set
 # CONFIG_SECURITY_SELINUX_DEVELOP is not set
+# CONFIG_SECURITY_SELINUX_DEBUG is not set
 # CONFIG_SECURITY_WRITABLE_HOOKS is not set
 
 # Enable "lockdown" LSM for bright line between the root user and kernel memory.
@@ -67,10 +69,19 @@ CONFIG_HARDENED_USERCOPY=y
 # Randomize allocator freelists, harden metadata.
 CONFIG_SLAB_FREELIST_RANDOM=y
 CONFIG_SLAB_FREELIST_HARDENED=y
+CONFIG_RANDOM_KMALLOC_CACHES=y
 
-# Randomize high-order page allocation freelist.
+# Make cross-slab heap attacks not as trivial when object sizes are the same. (Same as slab_nomerge boot param.)
+# CONFIG_SLAB_MERGE_DEFAULT is not set
+
+# Allow for randomization of high-order page allocation freelist. Must be enabled with
+# the "page_alloc.shuffle=1" command line below).
 CONFIG_SHUFFLE_PAGE_ALLOCATOR=y
 
+# Sanity check userspace page table mappings (since v5.17)
+CONFIG_PAGE_TABLE_CHECK=y
+CONFIG_PAGE_TABLE_CHECK_ENFORCED=y
+
 # Allow allocator validation checking to be enabled (see "slub_debug=P" below).
 CONFIG_SLUB_DEBUG=y
 
@@ -117,6 +128,7 @@ CONFIG_UBSAN_LOCAL_BOUNDS=y
 
 # Enable sampling-based overflow detection (since v5.12). This is similar to KASAN coverage, but with almost zero runtime overhead.
 CONFIG_KFENCE=y
+CONFIG_KFENCE_SAMPLE_INTERVAL=100
 
 # Randomize kernel stack offset on syscall entry (since v5.13).
 CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y
@@ -185,6 +197,9 @@ CONFIG_STATIC_USERMODEHELPER=y
 # Use the modern PTY interface (devpts) only.
 # CONFIG_LEGACY_PTYS is not set
 
+# Block TTY stuffing attacks (this will break screen readers, see "dev.tty.legacy_tiocsti" sysctl below).
+# CONFIG_LEGACY_TIOCSTI is not set
+
 # If SELinux can be disabled at runtime, the LSM structures cannot be read-only; keep off.
 # CONFIG_SECURITY_SELINUX_DISABLE is not set
 
@@ -192,10 +207,14 @@ CONFIG_STATIC_USERMODEHELPER=y
 CONFIG_PANIC_ON_OOPS=y
 CONFIG_PANIC_TIMEOUT=-1
 
+# Limit sysrq to sync,unmount,reboot. For more details see the sysrq bit field table.
+CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=176
+
 # Keep root from altering kernel memory via loadable modules.
 # CONFIG_MODULES is not set
 
 # But if CONFIG_MODULE=y is needed, at least they must be signed with a per-build key.
+# See also kernel.modules_disabled sysctl below.
 CONFIG_STRICT_MODULE_RWX=y
 CONFIG_MODULE_SIG=y
 CONFIG_MODULE_SIG_FORCE=y
@@ -203,6 +222,7 @@ CONFIG_MODULE_SIG_ALL=y
 CONFIG_MODULE_SIG_SHA512=y
 CONFIG_MODULE_SIG_HASH="sha512"
 CONFIG_MODULE_SIG_KEY="certs/signing_key.pem"
+# CONFIG_MODULE_FORCE_LOAD is not set
 
 # GCC plugins
 
@@ -243,11 +263,18 @@ CONFIG_RANDOMIZE_BASE=y
 CONFIG_RANDOMIZE_MEMORY=y
 
 # Modern libc no longer needs a fixed-position mapping in userspace, remove it as a possible target.
+# CONFIG_X86_VSYSCALL_EMULATION is not set
 CONFIG_LEGACY_VSYSCALL_NONE=y
 
 # Enable Kernel Page Table Isolation to remove an entire class of cache timing side-channels.
 CONFIG_PAGE_TABLE_ISOLATION=y
 
+# Enforce CET Indirect Branch Tracking in the kernel. (Since v5.18)
+CONFIG_X86_KERNEL_IBT=y
+
+# Support userspace CET Shadow Stack
+CONFIG_X86_USER_SHADOW_STACK=y
+
 # Remove additional (32-bit) attack surface, unless you really need them.
 # CONFIG_COMPAT is not set
 # CONFIG_IA32_EMULATION is not set
@@ -265,6 +292,6 @@ CONFIG_AMD_IOMMU_V2=y
 # Straight-Line-Speculation
 CONFIG_SLS=y
 
-# Enable Control Flow Integrity (since v6.1)
+# Enable Control Flow Integrity (since v6.1).
 CONFIG_CFI_CLANG=y
 # CONFIG_CFI_PERMISSIVE is not set