But nobody likes checking configs manually. So let the computers do their job!
__kconfig-hardened-check.py__ helps me to check the Linux kernel Kconfig option list
-against my hardening preferences for `x86_64`, which are based on the
+against my hardening preferences, which are based on the
[KSPP recommended settings][1] and last public [grsecurity][2] patch (options
which they disable).
Please don't cry if my Python code looks like C. I'm just a kernel developer.
-__TODO:__ add hardening preferences for ARM.
+## Supported microarchitectures
+
+ - X86_64
+ - X86_32
+ - ARM64
+ - ARM
## Script output examples
### Usage
```
-#./kconfig-hardened-check.py
-usage: kconfig-hardened-check.py [-h] [-p {X86_64,X86_32}] [-c CONFIG]
- [--debug]
+#usage: kconfig-hardened-check.py [-h] [-p {X86_64,X86_32,ARM64,ARM}]
+ [-c CONFIG] [--debug]
Checks the hardening options in the Linux kernel config
optional arguments:
-h, --help show this help message and exit
- -p {X86_64,X86_32}, --print {X86_64,X86_32}
+ -p {X86_64,X86_32,ARM64,ARM}, --print {X86_64,X86_32,ARM64,ARM}
print hardening preferences for selected architecture
-c CONFIG, --config CONFIG
check the config_file against these preferences
--debug enable internal debug mode
+
```
### Script output for `Ubuntu 18.04 (Bionic Beaver)` kernel config
```
-#./kconfig-hardened-check.py -c config_files/distros/ubuntu-bionic-generic.config
+#./kconfig-hardened-check.py -c config_files/distros/ubuntu-bionic-generic.config
[+] Trying to detect architecture in "config_files/distros/ubuntu-bionic-generic.config"...
[+] Detected architecture: X86_64
[+] Checking "config_files/distros/ubuntu-bionic-generic.config" against hardening preferences...
option name | desired val | decision | reason || check result
===================================================================================================================
CONFIG_BUG | y |defconfig | self_protection || OK
- CONFIG_RETPOLINE | y |defconfig | self_protection || OK
- CONFIG_X86_SMAP | y |defconfig | self_protection || OK
- CONFIG_X86_INTEL_UMIP | y |defconfig | self_protection || OK
CONFIG_STRICT_KERNEL_RWX | y |defconfig | self_protection || OK
- CONFIG_RANDOMIZE_BASE | y |defconfig | self_protection || OK
CONFIG_STACKPROTECTOR_STRONG | y |defconfig | self_protection ||CONFIG_CC_STACKPROTECTOR_STRONG: OK ("y")
- CONFIG_THREAD_INFO_IN_TASK | y |defconfig | self_protection || OK
CONFIG_SLUB_DEBUG | y |defconfig | self_protection || OK
CONFIG_STRICT_MODULE_RWX | y |defconfig | self_protection || OK
- CONFIG_SYN_COOKIES | y |defconfig | self_protection || OK
CONFIG_PAGE_TABLE_ISOLATION | y |defconfig | self_protection || OK
CONFIG_RANDOMIZE_MEMORY | y |defconfig | self_protection || OK
+ CONFIG_RANDOMIZE_BASE | y |defconfig | self_protection || OK
+ CONFIG_RETPOLINE | y |defconfig | self_protection || OK
+ CONFIG_X86_SMAP | y |defconfig | self_protection || OK
+ CONFIG_X86_INTEL_UMIP | y |defconfig | self_protection || OK
+ CONFIG_SYN_COOKIES | y |defconfig | self_protection || OK
CONFIG_VMAP_STACK | y |defconfig | self_protection || OK
+ CONFIG_THREAD_INFO_IN_TASK | y |defconfig | self_protection || OK
CONFIG_BUG_ON_DATA_CORRUPTION | y | kspp | self_protection || FAIL: "is not set"
CONFIG_DEBUG_WX | y | kspp | self_protection || OK
CONFIG_SCHED_STACK_END_CHECK | y | kspp | self_protection || OK
CONFIG_GCC_PLUGIN_STRUCTLEAK | y | kspp | self_protection || FAIL: not found
CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL | y | kspp | self_protection || FAIL: not found
CONFIG_GCC_PLUGIN_LATENT_ENTROPY | y | kspp | self_protection || FAIL: not found
- CONFIG_REFCOUNT_FULL | y | kspp | self_protection || FAIL: "is not set"
CONFIG_DEBUG_LIST | y | kspp | self_protection || FAIL: "is not set"
CONFIG_DEBUG_SG | y | kspp | self_protection || FAIL: "is not set"
CONFIG_DEBUG_CREDENTIALS | y | kspp | self_protection || FAIL: "is not set"
CONFIG_MODULE_SIG_SHA512 | y | kspp | self_protection || OK
CONFIG_MODULE_SIG_FORCE | y | kspp | self_protection || FAIL: "is not set"
CONFIG_DEFAULT_MMAP_MIN_ADDR | 65536 | kspp | self_protection || OK
+ CONFIG_REFCOUNT_FULL | y | kspp | self_protection || FAIL: "is not set"
CONFIG_GCC_PLUGIN_STACKLEAK | y | my | self_protection || FAIL: not found
CONFIG_LOCK_DOWN_KERNEL | y | my | self_protection || OK
CONFIG_SLUB_DEBUG_ON | y | my | self_protection || FAIL: "is not set"
CONFIG_SECURITY_DMESG_RESTRICT | y | my | self_protection || FAIL: "is not set"
CONFIG_STATIC_USERMODEHELPER | y | my | self_protection || FAIL: "is not set"
CONFIG_SECURITY_LOADPIN | y | my | self_protection || FAIL: "is not set"
+ CONFIG_RESET_ATTACK_MITIGATION | y | my | self_protection || OK
CONFIG_PAGE_POISONING_NO_SANITY | is not set | my | self_protection || OK: not found
CONFIG_PAGE_POISONING_ZERO | is not set | my | self_protection || OK: not found
CONFIG_SLAB_MERGE_DEFAULT | is not set | my | self_protection || FAIL: "y"
projects / kconfig-hardened-check.git / blobdiff