On 05/09/2014 11:29 AM, Mark Gomersbach wrote: > Maybe a bug somewhere else too, which combination kernel/grsec/pax was used? >
Whatever came with sys-kernel/hardened-sources-3.11.7-r1: # uname -a Linux mmmc2 3.11.7-hardened-r1 #1 SMP Fri Jan 3 23:13:48 EST 2014 x86_64 Intel(R) Xeon(R) CPU 5160 @ 3.00GHz GenuineIntel GNU/Linux Here's the hardened portion of the kernel .config for the web server that blew up today. The config for the mail server should be almost identical. I maintain the kernel configs for different hardware in different repos, but unless I've made a mistake, the hardening options should be the same. # # Security options # # # Grsecurity # CONFIG_PAX_KERNEXEC_PLUGIN=y CONFIG_PAX_PER_CPU_PGD=y CONFIG_TASK_SIZE_MAX_SHIFT=42 CONFIG_PAX_USERCOPY_SLABS=y CONFIG_GRKERNSEC=y # CONFIG_GRKERNSEC_CONFIG_AUTO is not set CONFIG_GRKERNSEC_CONFIG_CUSTOM=y # # Customize Configuration # # # PaX # CONFIG_PAX=y # # PaX Control # # CONFIG_PAX_SOFTMODE is not set # CONFIG_PAX_PT_PAX_FLAGS is not set CONFIG_PAX_XATTR_PAX_FLAGS=y CONFIG_PAX_NO_ACL_FLAGS=y # CONFIG_PAX_HAVE_ACL_FLAGS is not set # CONFIG_PAX_HOOK_ACL_FLAGS is not set # # Non-executable pages # CONFIG_PAX_NOEXEC=y CONFIG_PAX_PAGEEXEC=y # CONFIG_PAX_EMUTRAMP is not set CONFIG_PAX_MPROTECT=y # CONFIG_PAX_MPROTECT_COMPAT is not set # CONFIG_PAX_ELFRELOCS is not set CONFIG_PAX_KERNEXEC=y # CONFIG_PAX_KERNEXEC_PLUGIN_METHOD_BTS is not set CONFIG_PAX_KERNEXEC_PLUGIN_METHOD_OR=y CONFIG_PAX_KERNEXEC_PLUGIN_METHOD="or" # # Address Space Layout Randomization # CONFIG_PAX_ASLR=y # CONFIG_PAX_RANDKSTACK is not set CONFIG_PAX_RANDUSTACK=y CONFIG_PAX_RANDMMAP=y # # Miscellaneous hardening features # # CONFIG_PAX_MEMORY_SANITIZE is not set # CONFIG_PAX_MEMORY_STACKLEAK is not set CONFIG_PAX_MEMORY_STRUCTLEAK=y CONFIG_PAX_MEMORY_UDEREF=y CONFIG_PAX_REFCOUNT=y CONFIG_PAX_CONSTIFY_PLUGIN=y CONFIG_PAX_USERCOPY=y # CONFIG_PAX_USERCOPY_DEBUG is not set CONFIG_PAX_SIZE_OVERFLOW=y # CONFIG_PAX_LATENT_ENTROPY is not set # # Memory Protections # CONFIG_GRKERNSEC_KMEM=y CONFIG_GRKERNSEC_IO=y CONFIG_GRKERNSEC_PERF_HARDEN=y CONFIG_GRKERNSEC_RAND_THREADSTACK=y CONFIG_GRKERNSEC_PROC_MEMMAP=y CONFIG_GRKERNSEC_BRUTE=y CONFIG_GRKERNSEC_MODHARDEN=y # CONFIG_GRKERNSEC_HIDESYM is not set # CONFIG_GRKERNSEC_KERN_LOCKOUT is not set # # Role Based Access Control Options # CONFIG_GRKERNSEC_NO_RBAC=y # CONFIG_GRKERNSEC_ACL_HIDEKERN is not set CONFIG_GRKERNSEC_ACL_MAXTRIES=3 CONFIG_GRKERNSEC_ACL_TIMEOUT=30 # # Filesystem Protections # CONFIG_GRKERNSEC_PROC=y CONFIG_GRKERNSEC_PROC_USER=y CONFIG_GRKERNSEC_PROC_ADD=y CONFIG_GRKERNSEC_LINK=y # CONFIG_GRKERNSEC_SYMLINKOWN is not set CONFIG_GRKERNSEC_FIFO=y CONFIG_GRKERNSEC_SYSFS_RESTRICT=y # CONFIG_GRKERNSEC_ROFS is not set CONFIG_GRKERNSEC_DEVICE_SIDECHANNEL=y CONFIG_GRKERNSEC_CHROOT=y CONFIG_GRKERNSEC_CHROOT_MOUNT=y CONFIG_GRKERNSEC_CHROOT_DOUBLE=y CONFIG_GRKERNSEC_CHROOT_PIVOT=y CONFIG_GRKERNSEC_CHROOT_CHDIR=y CONFIG_GRKERNSEC_CHROOT_CHMOD=y CONFIG_GRKERNSEC_CHROOT_FCHDIR=y CONFIG_GRKERNSEC_CHROOT_MKNOD=y CONFIG_GRKERNSEC_CHROOT_SHMAT=y CONFIG_GRKERNSEC_CHROOT_UNIX=y CONFIG_GRKERNSEC_CHROOT_FINDTASK=y CONFIG_GRKERNSEC_CHROOT_NICE=y CONFIG_GRKERNSEC_CHROOT_SYSCTL=y CONFIG_GRKERNSEC_CHROOT_CAPS=y # CONFIG_GRKERNSEC_CHROOT_INITRD is not set # # Kernel Auditing # # CONFIG_GRKERNSEC_AUDIT_GROUP is not set # CONFIG_GRKERNSEC_EXECLOG is not set CONFIG_GRKERNSEC_RESLOG=y # CONFIG_GRKERNSEC_CHROOT_EXECLOG is not set # CONFIG_GRKERNSEC_AUDIT_PTRACE is not set # CONFIG_GRKERNSEC_AUDIT_CHDIR is not set # CONFIG_GRKERNSEC_AUDIT_MOUNT is not set CONFIG_GRKERNSEC_SIGNAL=y CONFIG_GRKERNSEC_FORKFAIL=y # CONFIG_GRKERNSEC_TIME is not set CONFIG_GRKERNSEC_PROC_IPADDR=y CONFIG_GRKERNSEC_RWXMAP_LOG=y # # Executable Protections # CONFIG_GRKERNSEC_DMESG=y CONFIG_GRKERNSEC_HARDEN_PTRACE=y CONFIG_GRKERNSEC_PTRACE_READEXEC=y # CONFIG_GRKERNSEC_SETXID is not set # CONFIG_GRKERNSEC_TPE is not set # # Network Protections # CONFIG_GRKERNSEC_RANDNET=y # CONFIG_GRKERNSEC_BLACKHOLE is not set CONFIG_GRKERNSEC_NO_SIMULT_CONNECT=y # CONFIG_GRKERNSEC_SOCKET is not set # # Physical Protections # # CONFIG_GRKERNSEC_DENYUSB is not set # # Sysctl Support # # CONFIG_GRKERNSEC_SYSCTL is not set # # Logging Options # CONFIG_GRKERNSEC_FLOODTIME=1 CONFIG_GRKERNSEC_FLOODBURST=4 # CONFIG_KEYS is not set CONFIG_SECURITY_DMESG_RESTRICT=y CONFIG_SECURITY=y # CONFIG_SECURITYFS is not set # CONFIG_SECURITY_NETWORK is not set # CONFIG_SECURITY_PATH is not set # CONFIG_INTEL_TXT is not set # CONFIG_SECURITY_SMACK is not set # CONFIG_SECURITY_TOMOYO is not set # CONFIG_SECURITY_APPARMOR is not set # CONFIG_IMA is not set
