| 485 |
domain ACL. For example, |
domain ACL. For example, |
| 486 |
|
|
| 487 |
"1 /bin/sh if task.euid!=0" |
"1 /bin/sh if task.euid!=0" |
| 488 |
|
|
| 489 |
allows the domain to execute /bin/sh only when the process's euid |
allows the domain to execute /bin/sh only when the process's euid |
| 490 |
is not 0, and |
is not 0, and |
| 491 |
|
|
| 871 |
based on realpath while argv[0] check is done based on the symlink's |
based on realpath while argv[0] check is done based on the symlink's |
| 872 |
pathname and argv[0], this specification will allow attackers behave |
pathname and argv[0], this specification will allow attackers behave |
| 873 |
as /bin/cat in the domain of /bin/ls if "/bin/ls and /bin/cat are |
as /bin/cat in the domain of /bin/ls if "/bin/ls and /bin/cat are |
| 874 |
links to /sbin/busybox" and "the attacker is permitted to create |
links to /sbin/busybox" and "the attacker is permitted to create |
| 875 |
a symlink named ~/cat that points to /bin/ls" and "the attacker is |
a symlink named ~/cat that points to /bin/ls" and "the attacker is |
| 876 |
permitted to run /bin/ls". |
permitted to run /bin/ls". |
| 877 |
So, I changed to compare the basename of realpath and argv[0]. |
So, I changed to compare the basename of realpath and argv[0]. |
| 959 |
|
|
| 960 |
Until now, users had to add init=/.init parameter to load policy |
Until now, users had to add init=/.init parameter to load policy |
| 961 |
before /sbin/init starts. |
before /sbin/init starts. |
| 962 |
I inserted call_usermodehelper() to call external policy loader when |
I inserted call_usermodehelper() to call external policy loader when |
| 963 |
execve("/sbin/init") is requested and external policy loader exists. |
execve("/sbin/init") is requested and external policy loader exists. |
| 964 |
|
|
| 965 |
This change will remove init=/.init parameter from most environment, |
This change will remove init=/.init parameter from most environment, |
| 1003 |
|
|
| 1004 |
@ Remove initializer directive. |
@ Remove initializer directive. |
| 1005 |
|
|
| 1006 |
Use "initialize_domain" instrad of "initializer". |
Use "initialize_domain" instead of "initializer". |
| 1007 |
|
|
| 1008 |
Fix 2007/08/21 |
Fix 2007/08/21 |
| 1009 |
|
|
| 2046 |
kernel 2.6.31 introduced memory leak detection mechanism |
kernel 2.6.31 introduced memory leak detection mechanism |
| 2047 |
( CONFIG_DEBUG_KMEMLEAK ), TOMOYO no longer needs to use own list. |
( CONFIG_DEBUG_KMEMLEAK ), TOMOYO no longer needs to use own list. |
| 2048 |
|
|
| 2049 |
I removed the list to ruduce use of spinlocks. |
I removed the list to reduce use of spinlocks. |
| 2050 |
|
|
| 2051 |
@ Rewrite ccs-patch-2.\*.diff . |
@ Rewrite ccs-patch-2.\*.diff . |
| 2052 |
|
|
| 2053 |
ccs-patch-2.\*.diff was rewriteen like LSM hooks. |
ccs-patch-2.\*.diff was rewritten like LSM hooks. |
| 2054 |
|
|
| 2055 |
@ Don't check "allow_read/write" for open-for-ioctl-only. |
@ Don't check "allow_read/write" for open-for-ioctl-only. |
| 2056 |
|
|
| 2066 |
|
|
| 2067 |
@ Move files from fs/ to security/ccsecurity. |
@ Move files from fs/ to security/ccsecurity. |
| 2068 |
|
|
| 2069 |
Config menu section changed from "File systems" to "Security options". |
Config menu section changed from "File systems" to "Security options". |
| 2070 |
|
|
| 2071 |
Kernel config symbols changed from CONFIG_SAKURA CONFIG_TOMOYO |
Kernel config symbols changed from CONFIG_SAKURA CONFIG_TOMOYO |
| 2072 |
CONFIG_SYAORAN to CONFIG_CCSECURITY . |
CONFIG_SYAORAN to CONFIG_CCSECURITY . |
| 2084 |
the domain which the process belongs to. |
the domain which the process belongs to. |
| 2085 |
|
|
| 2086 |
Thus, I added global PID in audit logs. |
Thus, I added global PID in audit logs. |
| 2087 |
|
|
| 2088 |
@ Transit to new domain before do_execve() succeeds. |
@ Transit to new domain before do_execve() succeeds. |
| 2089 |
|
|
| 2090 |
Permission checks for interpreters and environment variables are |
Permission checks for interpreters and environment variables are |
| 2091 |
done using new domain. In order to be allow ccs-queryd to reach the new |
done using new domain. In order to allow ccs-queryd to reach the new |
| 2092 |
domain via global PID, I reverted "Don't transit to new domain until |
domain via global PID, I reverted "Don't transit to new domain until |
| 2093 |
do_execve() succeeds." made on 2008/10/07. |
do_execve() succeeds." made on 2008/10/07. |
| 2094 |
|
|
| 2173 |
@ Fix size truncation bug at ccs_memcmp(). |
@ Fix size truncation bug at ccs_memcmp(). |
| 2174 |
|
|
| 2175 |
ccs_memcmp() was using "u8" for size parameter by error. Therefore, when |
ccs_memcmp() was using "u8" for size parameter by error. Therefore, when |
| 2176 |
size >= 256 was passed to ccs_memcmp(), it was doing partial comarison |
size >= 256 was passed to ccs_memcmp(), it was doing partial comparison |
| 2177 |
(incorrect result) or read overrun (CPU stall). |
(incorrect result) or read overrun (CPU stall). |
| 2178 |
|
|
| 2179 |
ccs_memcmp() should use "size_t" for size parameter because size of |
ccs_memcmp() should use "size_t" for size parameter because size of |
| 2218 |
atomic_dec_and_test() for removing an element from a list. |
atomic_dec_and_test() for removing an element from a list. |
| 2219 |
I moved that operation to garbage collector in order to reduce frequency |
I moved that operation to garbage collector in order to reduce frequency |
| 2220 |
of mutex_lock()/mutex_unlock() calls. |
of mutex_lock()/mutex_unlock() calls. |
| 2221 |
|
|
| 2222 |
|
@ Escape from nested loops correctly. |
| 2223 |
|
|
| 2224 |
|
In ccs_read_address_group_policy(), I was escaping from nested loops |
| 2225 |
|
correctly. But in ccs_read_path_group_policy() and |
| 2226 |
|
ccs_read_number_group_policy(), I wasn't. |
| 2227 |
|
|
| 2228 |
|
As a result, reading path_group and number_group caused kernel oops |
| 2229 |
|
when they were not read atomically. |
| 2230 |
|
|
| 2231 |
|
Fix 2009/11/06 |
| 2232 |
|
|
| 2233 |
|
@ Fix incorrect allow_mount audit log. |
| 2234 |
|
|
| 2235 |
|
Audit log for allow_mount was using decimal format. |
| 2236 |
|
It needs to use hexadecimal format. |
| 2237 |
|
|
| 2238 |
|
Fix 2009/11/09 |
| 2239 |
|
|
| 2240 |
|
@ Add profile version check. |
| 2241 |
|
|
| 2242 |
|
To avoid upgrading from TOMOYO 1.6.x to TOMOYO 1.7.x without upgrading |
| 2243 |
|
/proc/ccs/profile (which results in not protecting the system at all), |
| 2244 |
|
I added a check for PROFILE_VERSION= . |
| 2245 |
|
|
| 2246 |
|
Version 1.7.1 2009/11/11 Fourth anniversary release. |
| 2247 |
|
|
| 2248 |
|
Fix 2009/11/13 |
| 2249 |
|
|
| 2250 |
|
@ Don't use core_initcall() for initializing lock for GC. |
| 2251 |
|
|
| 2252 |
|
Some kernels call TOMOYO's hooks before processing core_initcall(). |
| 2253 |
|
Thus, I can't use core_initcall() for initializing lock for GC. |
| 2254 |
|
|
| 2255 |
|
Fix 2009/11/18 |
| 2256 |
|
|
| 2257 |
|
@ Don't check "allow_write" permission for open(O_RDONLY | O_TRUNC). |
| 2258 |
|
|
| 2259 |
|
Since TOMOYO checks "allow_truncate" permission rather than "allow_write" |
| 2260 |
|
permission for O_TRUNC, I need to distinguish open(O_RDONLY | O_TRUNC) |
| 2261 |
|
and open(O_RDWR | O_TRUNC). But I made a mistake between TOMOYO 1.7.0 and |
| 2262 |
|
1.7.1 which made it impossible for TOMOYO for kernels 2.6.14 and earlier |
| 2263 |
|
to distinguish them. |
| 2264 |
|
|
| 2265 |
|
Fix 2009/11/27 |
| 2266 |
|
|
| 2267 |
|
@ Use newly created domain's name for domain creation audit log. |
| 2268 |
|
|
| 2269 |
|
Since 1.7.0 , /proc/ccs/reject_log was by error using existing domain's |
| 2270 |
|
name when auditing newly created domain's "use_profile" line. |
| 2271 |
|
|
| 2272 |
|
Fix 2009/12/12 |
| 2273 |
|
|
| 2274 |
|
@ Use rcu_read_lock() for find_task_by_pid(). |
| 2275 |
|
|
| 2276 |
|
Since kernel 2.6.18 , caller of find_task_by_pid() needs to call |
| 2277 |
|
rcu_read_lock() rather than read_lock(&tasklist_lock) because find_pid() |
| 2278 |
|
uses RCU primitives but spinlock does not prevent RCU callback if |
| 2279 |
|
preemptive RCU ( CONFIG_PREEMPT_RCU or CONFIG_TREE_PREEMPT_RCU ) is |
| 2280 |
|
enabled. |
| 2281 |
|
|
| 2282 |
|
Fix 2009/12/15 |
| 2283 |
|
|
| 2284 |
|
@ Allow deleting "quota_exceeded" and "transition_failed" entries. |
| 2285 |
|
|
| 2286 |
|
To notify users of "this domain has too many entries to hold" and "some |
| 2287 |
|
process in this domain was not able to perform domain transition", |
| 2288 |
|
"quota_exceeded" and "transition_failed" messages are used respectively. |
| 2289 |
|
These messages were not deletable. But it is more convenient for users |
| 2290 |
|
to be notified again if such events occurred again after tuning policy. |
| 2291 |
|
Thus, I made these messages deletable. |
| 2292 |
|
|
| 2293 |
|
Fix 2009/12/17 |
| 2294 |
|
|
| 2295 |
|
@ Don't check read permission in ccs_try_alt_exec(). |
| 2296 |
|
|
| 2297 |
|
While I was trying to remove ccs_execve_list list for GC optimization |
| 2298 |
|
between TOMOYO 1.7.0 and 1.7.1 , I made a mistake which made TOMOYO to |
| 2299 |
|
check allow_read permission of the programs specified by execute_handler |
| 2300 |
|
and denied_execute_handler keywords. |
| 2301 |
|
|
| 2302 |
|
@ Don't check DAC permission if disabled mode. |
| 2303 |
|
|
| 2304 |
|
I was checking DAC permissions regarding directory entry modification |
| 2305 |
|
operations (e.g. mkdir()) even if mode=disabled . It is a waste of CPU |
| 2306 |
|
resource to check DAC permissions when MAC permissions are not checked. |
| 2307 |
|
Thus, I modified to skip DAC permission checks if mode=disabled . |
| 2308 |
|
|
| 2309 |
|
Fix 2009/12/19 |
| 2310 |
|
|
| 2311 |
|
@ Fix memory leak in ccs_environ(). |
| 2312 |
|
|
| 2313 |
|
When I fixed a bug that a permission like |
| 2314 |
|
|
| 2315 |
|
allow_env PATH if exec.envp["PATH"]="/" |
| 2316 |
|
|
| 2317 |
|
was not working (2009/11/02), I allocated two buffers but only one buffer |
| 2318 |
|
was released. |
| 2319 |
|
|
| 2320 |
|
This bug will trigger OOM killer if environment variable checking is |
| 2321 |
|
enabled. |
| 2322 |
|
|
| 2323 |
|
Fix 2010/01/17 |
| 2324 |
|
|
| 2325 |
|
@ Use current domain's name for execute_handler audit log. |
| 2326 |
|
|
| 2327 |
|
Since 1.6.7 , /proc/ccs/grant_log was by error using next domain's name |
| 2328 |
|
when auditing current domain's "execute_handler" line. |
| 2329 |
|
|
| 2330 |
|
Fix 2010/03/02 |
| 2331 |
|
|
| 2332 |
|
@ Allow domain transition without execve(). |
| 2333 |
|
|
| 2334 |
|
To be able to split permissions for Apache's CGI programs which are |
| 2335 |
|
executed without execve(), I added special domain transition which is |
| 2336 |
|
performed by atomically writing '\0'-terminated binary string to |
| 2337 |
|
/proc/ccs/.transition interface. For example, a process which belongs to |
| 2338 |
|
"<kernel> /usr/sbin/httpd" domain will transit to |
| 2339 |
|
"<kernel> /usr/sbin/httpd //app=cgi1\040id=10000" domain by atomically |
| 2340 |
|
writing "app=cgi1 id=10000" + '\0' to /proc/ccs/.transition using |
| 2341 |
|
Apache's ap_hook_handler() functionality. |
| 2342 |
|
|
| 2343 |
|
Note that '\0'-terminated binary string is converted to TOMOYO's string |
| 2344 |
|
inside kernel and prefix "//" is automatically added to the string so |
| 2345 |
|
that domainname does not conflict with domainnames created by execve(). |
| 2346 |
|
Without this prefix, if "<kernel> /usr/sbin/sshd /bin/bash" domain is |
| 2347 |
|
allowed to open /proc/ccs/.transition for writing and |
| 2348 |
|
"<kernel> /usr/sbin/sshd /bin/bash /usr/bin/passwd" domain is allowed to |
| 2349 |
|
access /etc/shadow , /bin/bash will be able to access /etc/shadow by |
| 2350 |
|
atomically writing "/usr/bin/passwd" + '\0' to /proc/ccs/.transition . |
| 2351 |
|
Allowing /bin/bash to access /etc/shadow is not what people want. |
| 2352 |
|
|
| 2353 |
|
Permission for this operation is checked by "allow_transit" keyword. |
| 2354 |
|
Unlike "allow_execute" keyword, the string parameter for "allow_transit" |
| 2355 |
|
keyword does not refer a real file on filesystem's namespace. Therefore, |
| 2356 |
|
you can store any combination of parameters like LDAP's DN entry in the |
| 2357 |
|
string parameter for "allow_transit" keyword. |
| 2358 |
|
|
| 2359 |
|
Fix 2010/03/08 |
| 2360 |
|
|
| 2361 |
|
@ Allow building as loadable kernel module. |
| 2362 |
|
|
| 2363 |
|
To be able to minimize filesize increment of vmlinux, I made it |
| 2364 |
|
possible to compile TOMOYO Linux as loadable kernel module. |
| 2365 |
|
Although patching the kernel source and recompiling the kernel are |
| 2366 |
|
inevitable, this change will make it easier to enable TOMOYO Linux |
| 2367 |
|
when there is a filesize limitation on vmlinux (e.g. embedded systems). |
| 2368 |
|
|
| 2369 |
|
Fix 2010/03/25 |
| 2370 |
|
|
| 2371 |
|
@ Fix ccs_get_ipv6_address() bug. |
| 2372 |
|
|
| 2373 |
|
Since 1.7.0 , ccs_get_ipv6_address() was by error returning address of |
| 2374 |
|
"struct list_head ccs_address_list" if memory allocation failed. |
| 2375 |
|
As a result, ccs_put_ipv6_address() will modify memory near |
| 2376 |
|
"struct list_head ccs_address_list" if memory allocation failed. |
| 2377 |
|
|
| 2378 |
|
Fix 2010/03/26 |
| 2379 |
|
|
| 2380 |
|
@ Fix ccs_lport_reserved() bug. |
| 2381 |
|
|
| 2382 |
|
Since 1.7.0 , ccs_lport_reserved() was by error checking wrong port |
| 2383 |
|
number. As a result, "deny_autobind" keyword was not working as expected. |
| 2384 |
|
|
| 2385 |
|
Version 1.7.2 2010/04/01 Feature enhancement release. |
| 2386 |
|
|
| 2387 |
|
Fix 2010/04/10 |
| 2388 |
|
|
| 2389 |
|
@ Fix invalid "struct nameidata" to "struct path" conversion macro. |
| 2390 |
|
|
| 2391 |
|
Regarding kernels 2.6.24 and earlier, I was converting "struct nameidata" |
| 2392 |
|
to "struct path" in caller side so that I can unify the callee function's |
| 2393 |
|
parameter type. But it turned out that the macro I used did not follow C |
| 2394 |
|
standards and did not work with gcc 4.x . As a result, "allow_pivot_root" |
| 2395 |
|
keyword was not working as expected. |
| 2396 |
|
|
| 2397 |
|
Fix 2010/05/05 |
| 2398 |
|
|
| 2399 |
|
@ Fix incorrect audit on/off control. |
| 2400 |
|
|
| 2401 |
|
The grant_log= and reject_log= parameters of CONFIG::misc::env were not |
| 2402 |
|
used because I forgot to update request type. As a result, those of |
| 2403 |
|
CONFIG::file::execute were used for CONFIG::misc::env . |
| 2404 |
|
|
| 2405 |
|
Those of CONFIG::file::rewrite were not used because I forgot to update |
| 2406 |
|
request type. As a result, those of CONFIG::file::truncate were used for |
| 2407 |
|
CONFIG::file::rewrite . |
| 2408 |
|
|
| 2409 |
|
Fix 2010/05/10 |
| 2410 |
|
|
| 2411 |
|
@ Fix incorrect out of memory warning. |
| 2412 |
|
|
| 2413 |
|
Out of memory warnings were not printed in some cases by error. |
| 2414 |
|
|
| 2415 |
|
Fix 2010/05/27 |
| 2416 |
|
|
| 2417 |
|
@ Add missing rcu_dereference() for ccs_find_execute_handler(). |
| 2418 |
|
|
| 2419 |
|
Since 1.7.0 , ccs_find_execute_handler() was by error using |
| 2420 |
|
list_for_each_entry() rather than list_for_each_entry_rcu(). |
| 2421 |
|
This bug affects only Alpha architecture. |
| 2422 |
|
|
| 2423 |
|
Fix 2010/06/03 |
| 2424 |
|
|
| 2425 |
|
@ Fix missing sanity check for "file_pattern". |
| 2426 |
|
|
| 2427 |
|
Since 1.7.0 , ccs_write_pattern_policy() was by error accepting |
| 2428 |
|
invalid pathname. |
| 2429 |
|
|
| 2430 |
|
Fix 2010/06/09 |
| 2431 |
|
|
| 2432 |
|
@ Add missing ccs_put_name() in ccs_parse_envp(). |
| 2433 |
|
|
| 2434 |
|
Since 1.7.0 , ccs_parse_envp() was not calling ccs_put_name() if |
| 2435 |
|
environment variable's value ('if exec.envp["name"]="value"' condition) |
| 2436 |
|
was invalid. |
| 2437 |
|
|
| 2438 |
|
@ Add missing NULL check in ccs_condition(). |
| 2439 |
|
|
| 2440 |
|
Since 1.7.0 , if 'if symlink.target=' part was given against non-file |
| 2441 |
|
permissions (e.g. allow_env PATH if symlink.target="/"), it triggered |
| 2442 |
|
NULL pointer dereference. |
| 2443 |
|
|
| 2444 |
|
Fix 2010/09/01 |
| 2445 |
|
|
| 2446 |
|
@ Change directives. |
| 2447 |
|
|
| 2448 |
|
I removed "allow_" prefix from directives. New directives for files are |
| 2449 |
|
prefixed with "file ". For example, "allow_read" changed to "file read", |
| 2450 |
|
"allow_ioctl" changed to "file ioctl". New directive for "allow_network |
| 2451 |
|
TCP" is "network inet stream", "allow_network UDP" is "network inet |
| 2452 |
|
dgram", "allow_network RAW" is "network inet raw". New directive for |
| 2453 |
|
"allow_env" is "misc env". New directive for "allow_signal" is "ipc |
| 2454 |
|
signal". New directive for "allow_capability" is "capability". These new |
| 2455 |
|
directives correspond with keywords used by profile's CONFIG lines. |
| 2456 |
|
|
| 2457 |
|
I removed "deny_rewrite" and "allow_rewrite" directives and introduced |
| 2458 |
|
"file append" directive. Thus, permission for open(O_WRONLY | O_APPEND) |
| 2459 |
|
changed from "allow_write" + "allow_rewrite" to "file append". |
| 2460 |
|
|
| 2461 |
|
I removed "SYS_MOUNT", "SYS_UMOUNT", "SYS_CHROOT", "SYS_KILL", |
| 2462 |
|
"SYS_LINK", "SYS_SYMLINK", "SYS_RENAME", "SYS_UNLINK", "SYS_CHMOD", |
| 2463 |
|
"SYS_CHOWN", "SYS_IOCTL", "SYS_PIVOT_ROOT" keywords from capabilities |
| 2464 |
|
because these permissions can be checked by other directives (e.g. |
| 2465 |
|
"file mount", "ipc signal"). |
| 2466 |
|
|
| 2467 |
|
I also removed "conceal_mount" keyword from capabilities because this |
| 2468 |
|
check requires hooks in filesystem part while almost all hooks for |
| 2469 |
|
filesystem part have moved to LSM by Linux 2.6.34. |
| 2470 |
|
|
| 2471 |
|
New directive for "execute_handler" is "task auto_execute_handler", |
| 2472 |
|
"denied_execute_handler" is "task denied_execute_handler". |
| 2473 |
|
|
| 2474 |
|
@ Distinguish send() and recv() operations. |
| 2475 |
|
|
| 2476 |
|
Until now, it was impossible for UDP and IP sockets to allow either |
| 2477 |
|
only sending or only receiving because permissions were aggregated with |
| 2478 |
|
"connect" keyword. I broke "connect" keyword into "send" and "recv" |
| 2479 |
|
keywords so that you can keep access control for send() operation enabled |
| 2480 |
|
when you have to disable access control for recv() operation due to |
| 2481 |
|
application breakage by discarding incoming datagram. |
| 2482 |
|
|
| 2483 |
|
@ Wait for next connection/datagram if current connection/datagram was |
| 2484 |
|
discarded. |
| 2485 |
|
|
| 2486 |
|
Regarding "network inet stream accept", "network inet dgram recv", |
| 2487 |
|
"network inet raw recv" directives, I modified to wait for next |
| 2488 |
|
connection/datagram if current connection/datagram was discarded. |
| 2489 |
|
LSM hooks for these directives are currently missing because this |
| 2490 |
|
behavior may break applications. If you found applications broken by |
| 2491 |
|
this behavior, you can set CONFIG::network::inet_stream_accept and/or |
| 2492 |
|
CONFIG::network::inet_dgram_recv and/or CONFIG::network::inet_raw_recv |
| 2493 |
|
to mode=disabled in order to only disable filtering for incoming |
| 2494 |
|
connection/datagram. |
| 2495 |
|
|
| 2496 |
|
@ Add Unix domain socket restriction support. |
| 2497 |
|
|
| 2498 |
|
Until now, it was possible to restrict only inet domain sockets (i.e. |
| 2499 |
|
TCP/UDP/RAW). I added restriction for Unix domain sockets (i.e. stream/ |
| 2500 |
|
dgram/seqpacket). New directive "network unix" is added as well as |
| 2501 |
|
"network inet" directive. |
| 2502 |
|
|
| 2503 |
|
@ Allow specifying multiple permissions in a line. |
| 2504 |
|
|
| 2505 |
|
Until now, only "allow_read/write" can be specified for combination of |
| 2506 |
|
"allow_read" + "allow_write". Now, you can combine other permissions as |
| 2507 |
|
long as type of parameters for these permissions is same. For example, |
| 2508 |
|
"file read/write/append/execute/unlink/truncate /tmp/file" is correct |
| 2509 |
|
but "file read/write/create /tmp/file" is wrong because "file create" |
| 2510 |
|
requires create mode whereas "file read" and "file write" do not. |
| 2511 |
|
|
| 2512 |
|
@ Allow wildcard for execute permission and domainname. |
| 2513 |
|
|
| 2514 |
|
Until now, to execute programs with temporary names, "aggregator" is |
| 2515 |
|
needed. To simplify code, I modified to accept wildcards for execute |
| 2516 |
|
permission and domainname. Now, you can directly specify |
| 2517 |
|
"file execute /tmp/logrotate.\?\?\?\?\?\?" and use |
| 2518 |
|
"/tmp/logrotate.\?\?\?\?\?\?" within domainnames. |
| 2519 |
|
|
| 2520 |
|
@ Change pathname for non-rename()able filesystems. |
| 2521 |
|
|
| 2522 |
|
LSM version of TOMOYO wants to use /proc/self/ rather than /proc/$PID/ if |
| 2523 |
|
$PID matches current thread's process ID in order to prevent current |
| 2524 |
|
thread from accessing other process's information unless needed. |
| 2525 |
|
But since procfs can be mounted on various locations (e.g. /proc/ /proc2/ |
| 2526 |
|
/p/ /tmp/foo/100/p/ ), LSM version of TOMOYO cannot tell that whether the |
| 2527 |
|
numeric part in the string returned by __d_path() represents process ID |
| 2528 |
|
or not. |
| 2529 |
|
|
| 2530 |
|
Therefore, to be able to convert from $PID to self no matter where procfs |
| 2531 |
|
is mounted, I changed pathname representations for filesystems which do |
| 2532 |
|
not support rename() operation (e.g. proc, sysfs, securityfs). |
| 2533 |
|
|
| 2534 |
|
Now, "/proc/self/mounts" changed to "proc:/self/mounts" and |
| 2535 |
|
"/sys/kernel/security/" changed to "sys:/kernel/security/" and |
| 2536 |
|
"/dev/pts/0" changed to "devpts:/0". |
| 2537 |
|
|
| 2538 |
|
@ Add a new keyword "any" for domain transition control. |
| 2539 |
|
|
| 2540 |
|
To be able to make it easier to apply auto_execute_handler on each |
| 2541 |
|
domain, I added "any" keyword to domain transition control keywords. Now, |
| 2542 |
|
"initialize_domain /usr/sbin/sshd" changed to |
| 2543 |
|
"initialize_domain /usr/sbin/sshd from any" and |
| 2544 |
|
"keep_domain <kernel> /usr/sbin/sshd /bin/bash" changed to |
| 2545 |
|
"keep_domain any from <kernel> /usr/sbin/sshd /bin/bash". |
| 2546 |
|
|
| 2547 |
|
"keep_domain /path/to/auto_execute_handler from any" will allow you to |
| 2548 |
|
apply auto_execute_handler for any domains without creating domains for |
| 2549 |
|
auto_execute_handler. |
| 2550 |
|
|
| 2551 |
|
@ Change buffering mode for reading policy. |
| 2552 |
|
|
| 2553 |
|
To be able to read() very very long lines correctly, I changed the way |
| 2554 |
|
TOMOYO buffers policy for reading. |
| 2555 |
|
|
| 2556 |
|
@ Introduce "acl_group" keyword. |
| 2557 |
|
|
| 2558 |
|
Until now, it was possible to specify only "allow_read" and "allow_env" |
| 2559 |
|
keywords in the exception policy. |
| 2560 |
|
|
| 2561 |
|
Since some operations like "file read/write/append /dev/null" and |
| 2562 |
|
"network UDP send/recv @DNS_SERVER 53" are very common and should be |
| 2563 |
|
permitted to all domains, I introduced "acl_group" keyword for giving |
| 2564 |
|
such permissions. |
| 2565 |
|
|
| 2566 |
|
For example, specify "acl_group 0 file read/write/append /dev/null" in |
| 2567 |
|
the exception policy and specify "use_group 0" from the domains in the |
| 2568 |
|
domain policy. |
| 2569 |
|
|
| 2570 |
|
"ignore_global_allow_read" and "ignore_global_allow_env" directives were |
| 2571 |
|
removed from domain policy and "use_group" keyword was added. |
| 2572 |
|
|
| 2573 |
|
@ Allow controlling generation of access granted logs for per an entry |
| 2574 |
|
basis. |
| 2575 |
|
|
| 2576 |
|
I added per-entry flag which controls generation of grant logs because |
| 2577 |
|
Xen and KVM issues ioctl requests so frequently. For example, |
| 2578 |
|
|
| 2579 |
|
file ioctl /dev/null 0x5401 if audit=no |
| 2580 |
|
|
| 2581 |
|
will suppress /proc/ccs/grant_log even if profile says grant_log=yes . |
| 2582 |
|
|
| 2583 |
|
file ioctl /dev/null 0x5401 if audit=yes |
| 2584 |
|
|
| 2585 |
|
will generate /proc/ccs/grant_log even if profile says grant_log=no . |
| 2586 |
|
|
| 2587 |
|
file ioctl /dev/null 0x5401 |
| 2588 |
|
|
| 2589 |
|
will generate /proc/ccs/grant_log only if profile says grant_log=yes . |
| 2590 |
|
|
| 2591 |
|
This flag is intended for frequently accessed resources like |
| 2592 |
|
|
| 2593 |
|
file read /var/www/html/\{\*\}/\*.html if audit=no |
| 2594 |
|
|
| 2595 |
|
. |
| 2596 |
|
|
| 2597 |
|
@ Change profile structure. |
| 2598 |
|
|
| 2599 |
|
To make it clear that preferences can be specified by per-profile basis, |
| 2600 |
|
I removed global preference ("PREFERENCE::"). Now, you need to explicitly |
| 2601 |
|
specify per-profile preference ("$profilenumber-PREFERENCE::"). |
| 2602 |
|
|
| 2603 |
|
I changed default mode for access grant logs from "yes" to "no". |
| 2604 |
|
You may change mode to "yes" if you want all grant logs to be generated. |
| 2605 |
|
You may override mode using "if audit=yes" if you want specific grant |
| 2606 |
|
logs to be generated. |
| 2607 |
|
|
| 2608 |
|
Since printing all warning/error messages to console is noisy, |
| 2609 |
|
I changed verbose mode control from per-preference basis to |
| 2610 |
|
per-functionality basis. Now, you can selectively print warning/error |
| 2611 |
|
messages. |
| 2612 |
|
|
| 2613 |
|
@ Automatically create domain by execve() even if enforcing mode. |
| 2614 |
|
|
| 2615 |
|
Until now, new domains are not created if the domain was not defined and |
| 2616 |
|
current domain is enforcing mode ("CONFIG::file::execute=enforcing"). |
| 2617 |
|
|
| 2618 |
|
To be able to restrict shell session without using "keep_domain", |
| 2619 |
|
I changed to create new domains automatically even if current domain is |
| 2620 |
|
enforcing mode. |
| 2621 |
|
|
| 2622 |
|
@ Replace "task.state" with "auto_domain_transition". |
| 2623 |
|
|
| 2624 |
|
task.state is difficult to use. Thus, I replaced task.state with |
| 2625 |
|
auto_domain_transition which performs domain transition instead of |
| 2626 |
|
changing current process's state variables. |
| 2627 |
|
|
| 2628 |
|
If domain transition failed, current process will be killed by SIGKILL |
| 2629 |
|
signal. This should not happen in normal circumstances, for you know the |
| 2630 |
|
domain to transit to and thereby you will define the domain beforehand |
| 2631 |
|
when you use "auto_domain_transition" keyword. |
| 2632 |
|
|
| 2633 |
|
@ Replace "allow_transit" with "task manual_domain_transition". |
| 2634 |
|
|
| 2635 |
|
I changed this directive to specify absolute domainname (e.g. |
| 2636 |
|
"<kernel> /usr/sbin/httpd //app=cgi1\040id=10000") rather than virtual |
| 2637 |
|
pathname (e.g. "//app=cgi1\040id=10000") because you know the domain to |
| 2638 |
|
transit to and thereby you will define the domain beforehand when you use |
| 2639 |
|
"task manual_domain_transition" directive. |
| 2640 |
|
|
| 2641 |
|
This change allows you to jump to arbitrary domain. |
| 2642 |
|
|
| 2643 |
|
@ Add "task auto_domain_transition". |
| 2644 |
|
|
| 2645 |
|
This is similar to "task manual_domain_transition", but is automatically |
| 2646 |
|
applied if conditions are met. For example, |
| 2647 |
|
|
| 2648 |
|
task auto_domain_transition <kernel> //./non-root if task.uid!=0 |
| 2649 |
|
|
| 2650 |
|
will automatically jump to "<kernel> //./non-root" domain if current |
| 2651 |
|
process's UID is not 0 whereas |
| 2652 |
|
|
| 2653 |
|
task manual_domain_transition <kernel> //./non-root if task.uid!=0 |
| 2654 |
|
|
| 2655 |
|
will jump to "<kernel> //./non-root" domain if current process's UID is |
| 2656 |
|
not 0 and current process wrote "<kernel> //./non-root" + '\n' to |
| 2657 |
|
/proc/ccs/.transition interface. |
| 2658 |
|
|
| 2659 |
|
If domain transition failed, current process will be killed by SIGKILL |
| 2660 |
|
signal. |
| 2661 |
|
|
| 2662 |
|
@ Optimize for object's size. |
| 2663 |
|
|
| 2664 |
|
I merged similar code in order to reduce object's filesize. |
| 2665 |
|
|
| 2666 |
|
Version 1.8.0 2010/XX/XX Feature enhancement release. |
TOMOYO
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