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Brooklyn/grsecurity/grsec_sysctl.c
Scare Crowe 2a709f28fa Auto exploit mitigation feature 
* 0day explit mitigation
* Memory corruption prevention
* Privilege escalation prevention
* Buffer over flow prevention
* File System corruption defense
* Thread escape prevention

This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
2021-11-13 09:26:51 +05:00

498 lines
11 KiB
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#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/sysctl.h>
#include <linux/grsecurity.h>
#include <linux/grinternal.h>
int
gr_handle_sysctl_mod(const char *dirname, const char *name, const int op)
{
#ifdef CONFIG_GRKERNSEC_SYSCTL
if (dirname == NULL || name == NULL)
return 0;
if (!strcmp(dirname, "grsecurity") && grsec_lock && (op & MAY_WRITE)) {
gr_log_str(GR_DONT_AUDIT, GR_SYSCTL_MSG, name);
return -EACCES;
}
#endif
return 0;
}
#if defined(CONFIG_GRKERNSEC_ROFS) || defined(CONFIG_GRKERNSEC_DENYUSB)
static int __maybe_unused __read_only one = 1;
#endif
#if defined(CONFIG_GRKERNSEC_SYSCTL) || defined(CONFIG_GRKERNSEC_ROFS) || \
defined(CONFIG_GRKERNSEC_DENYUSB)
struct ctl_table grsecurity_table[] = {
#ifdef CONFIG_GRKERNSEC_SYSCTL
#ifdef CONFIG_GRKERNSEC_SYSCTL_DISTRO
#ifdef CONFIG_GRKERNSEC_IO
{
.procname = "disable_priv_io",
.data = &grsec_disable_privio,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#endif
#ifdef CONFIG_GRKERNSEC_LINK
{
.procname = "linking_restrictions",
.data = &grsec_enable_link,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_SYMLINKOWN
{
.procname = "enforce_symlinksifowner",
.data = &grsec_enable_symlinkown,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "symlinkown_gid",
.data = &grsec_symlinkown_gid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_BRUTE
{
.procname = "deter_bruteforce",
.data = &grsec_enable_brute,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_FIFO
{
.procname = "fifo_restrictions",
.data = &grsec_enable_fifo,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_PTRACE_READEXEC
{
.procname = "ptrace_readexec",
.data = &grsec_enable_ptrace_readexec,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_SETXID
{
.procname = "consistent_setxid",
.data = &grsec_enable_setxid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_BLACKHOLE
{
.procname = "ip_blackhole",
.data = &grsec_enable_blackhole,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "lastack_retries",
.data = &grsec_lastack_retries,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_EXECLOG
{
.procname = "exec_logging",
.data = &grsec_enable_execlog,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_RWXMAP_LOG
{
.procname = "rwxmap_logging",
.data = &grsec_enable_log_rwxmaps,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_SIGNAL
{
.procname = "signal_logging",
.data = &grsec_enable_signal,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_FORKFAIL
{
.procname = "forkfail_logging",
.data = &grsec_enable_forkfail,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_TIME
{
.procname = "timechange_logging",
.data = &grsec_enable_time,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_SHMAT
{
.procname = "chroot_deny_shmat",
.data = &grsec_enable_chroot_shmat,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_UNIX
{
.procname = "chroot_deny_unix",
.data = &grsec_enable_chroot_unix,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_MOUNT
{
.procname = "chroot_deny_mount",
.data = &grsec_enable_chroot_mount,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_FCHDIR
{
.procname = "chroot_deny_fchdir",
.data = &grsec_enable_chroot_fchdir,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_DOUBLE
{
.procname = "chroot_deny_chroot",
.data = &grsec_enable_chroot_double,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_PIVOT
{
.procname = "chroot_deny_pivot",
.data = &grsec_enable_chroot_pivot,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_CHDIR
{
.procname = "chroot_enforce_chdir",
.data = &grsec_enable_chroot_chdir,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_CHMOD
{
.procname = "chroot_deny_chmod",
.data = &grsec_enable_chroot_chmod,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_MKNOD
{
.procname = "chroot_deny_mknod",
.data = &grsec_enable_chroot_mknod,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_NICE
{
.procname = "chroot_restrict_nice",
.data = &grsec_enable_chroot_nice,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_EXECLOG
{
.procname = "chroot_execlog",
.data = &grsec_enable_chroot_execlog,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_CAPS
{
.procname = "chroot_caps",
.data = &grsec_enable_chroot_caps,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_RENAME
{
.procname = "chroot_deny_bad_rename",
.data = &grsec_enable_chroot_rename,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_SYSCTL
{
.procname = "chroot_deny_sysctl",
.data = &grsec_enable_chroot_sysctl,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_TPE
{
.procname = "tpe",
.data = &grsec_enable_tpe,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "tpe_gid",
.data = &grsec_tpe_gid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_TPE_INVERT
{
.procname = "tpe_invert",
.data = &grsec_enable_tpe_invert,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_TPE_ALL
{
.procname = "tpe_restrict_all",
.data = &grsec_enable_tpe_all,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_SOCKET_ALL
{
.procname = "socket_all",
.data = &grsec_enable_socket_all,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "socket_all_gid",
.data = &grsec_socket_all_gid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_SOCKET_CLIENT
{
.procname = "socket_client",
.data = &grsec_enable_socket_client,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "socket_client_gid",
.data = &grsec_socket_client_gid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_SOCKET_SERVER
{
.procname = "socket_server",
.data = &grsec_enable_socket_server,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "socket_server_gid",
.data = &grsec_socket_server_gid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_AUDIT_GROUP
{
.procname = "audit_group",
.data = &grsec_enable_group,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
{
.procname = "audit_gid",
.data = &grsec_audit_gid,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_AUDIT_CHDIR
{
.procname = "audit_chdir",
.data = &grsec_enable_chdir,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_AUDIT_MOUNT
{
.procname = "audit_mount",
.data = &grsec_enable_mount,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_DMESG
{
.procname = "dmesg",
.data = &grsec_enable_dmesg,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_CHROOT_FINDTASK
{
.procname = "chroot_findtask",
.data = &grsec_enable_chroot_findtask,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_RESLOG
{
.procname = "resource_logging",
.data = &grsec_resource_logging,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_AUDIT_PTRACE
{
.procname = "audit_ptrace",
.data = &grsec_enable_audit_ptrace,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_HARDEN_PTRACE
{
.procname = "harden_ptrace",
.data = &grsec_enable_harden_ptrace,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_HARDEN_IPC
{
.procname = "harden_ipc",
.data = &grsec_enable_harden_ipc,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_HARDEN_TTY
{
.procname = "harden_tty",
.data = &grsec_enable_harden_tty,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
{
.procname = "grsec_lock",
.data = &grsec_lock,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
#ifdef CONFIG_GRKERNSEC_ROFS
{
.procname = "romount_protect",
.data = &grsec_enable_rofs,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_minmax_secure,
.extra1 = &one,
.extra2 = &one,
},
#endif
#if defined(CONFIG_GRKERNSEC_DENYUSB) && !defined(CONFIG_GRKERNSEC_DENYUSB_FORCE)
{
.procname = "deny_new_usb",
.data = &grsec_deny_new_usb,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec_secure,
},
#endif
{ }
};
#endif
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