| 1256 |
|
|
| 1257 |
You can silently terminate a process who requested execve() |
You can silently terminate a process who requested execve() |
| 1258 |
that is not permitted by policy. |
that is not permitted by policy. |
| 1259 |
|
|
| 1260 |
|
Fix 2008/03/03 |
| 1261 |
|
|
| 1262 |
|
@ Add "force_alt_exec" keyword. |
| 1263 |
|
|
| 1264 |
|
To be able to fully utilize "alt_exec" feature, |
| 1265 |
|
I added "force_alt_exec" keyword so that |
| 1266 |
|
all execute requests are replaced by the execute request of a program |
| 1267 |
|
specified by alt_exec feature. |
| 1268 |
|
|
| 1269 |
|
If this keyword is specified for a domain, the domain no longer |
| 1270 |
|
executes any programs regardless of the mode of file access control |
| 1271 |
|
(i.e. the domain won't execute even if MAC_FOR_FILE=0 ). |
| 1272 |
|
Instead, the domain executes the program specified by alt_exec feature |
| 1273 |
|
and the program specified by alt_exec feature validates the execute |
| 1274 |
|
request and executes it if it is appropriate to execute. |
| 1275 |
|
|
| 1276 |
|
If you can tolerate that there is no chance to return an error code |
| 1277 |
|
to the caller to tell the execute request was rejected, |
| 1278 |
|
this is more flexible approach than in-kernel execve() parameter |
| 1279 |
|
checking because we can do argv[] and envp[] checking easily. |
| 1280 |
|
|
| 1281 |
|
Fix 2008/03/04 |
| 1282 |
|
|
| 1283 |
|
@ Use string for access control mode. |
| 1284 |
|
|
| 1285 |
|
An integer expression for access control mode sometimes confuses |
| 1286 |
|
administrators because profile number is also an integer expression. |
| 1287 |
|
To avoid confusion between profile number and access control mode, |
| 1288 |
|
I introduced a string expression for access control mode. |
| 1289 |
|
|
| 1290 |
|
Modes which take an integer between 0 and 3. |
| 1291 |
|
|
| 1292 |
|
0 -> disabled |
| 1293 |
|
1 -> learning |
| 1294 |
|
2 -> permissive |
| 1295 |
|
3 -> enforcing |
| 1296 |
|
|
| 1297 |
|
Modes which take 0 or 1. |
| 1298 |
|
|
| 1299 |
|
0 -> disabled |
| 1300 |
|
1 -> enabled |
| 1301 |
|
|
| 1302 |
|
Fix 2008/03/10 |
| 1303 |
|
|
| 1304 |
|
@ Rename "force_alt_exec" keyword to "preferred_execute_handler". |
| 1305 |
|
|
| 1306 |
|
To be able to use different programs for validating execve() parameters, |
| 1307 |
|
I moved the location to specify the program's pathname from profile |
| 1308 |
|
to domain policy. |
| 1309 |
|
|
| 1310 |
|
The "preferred_execute_handler" keyword takes one pathname which is |
| 1311 |
|
invoked whenever execve() request is issued. Thus, any "allow_execute" |
| 1312 |
|
keywords in a domain with "preferred_execute_handler" are ignored. |
| 1313 |
|
This keyword is designed for validating expected/desirable execve() |
| 1314 |
|
requests in userspace, although there is no way to tell the caller |
| 1315 |
|
that the execve() request was rejected. |
| 1316 |
|
|
| 1317 |
|
@ Rename "alt_exec" keyword to "default_execute_handler". |
| 1318 |
|
|
| 1319 |
|
The "default_execute_handler" keyword takes one pathname which is |
| 1320 |
|
invoked only when execve() request was rejected. In other words, |
| 1321 |
|
this program is invoked only when the following conditions are met. |
| 1322 |
|
|
| 1323 |
|
(1) None of "allow_execute" keywords in the domain didn't match. |
| 1324 |
|
(2) The execve() request was rejected in enforcing mode. |
| 1325 |
|
(3) "preferred_execute_handler" keyword is not used by the domain. |
| 1326 |
|
|
| 1327 |
|
This keyword is designed for handling unexpected/undesirable execve() |
| 1328 |
|
requests, to redirect the process issuing such requests to somewhere. |
| 1329 |
|
|
| 1330 |
|
Fix 2008/03/18 |
| 1331 |
|
|
| 1332 |
|
@ Fix wrong/redundant locks in pre-vfs functions. |
| 1333 |
|
|
| 1334 |
|
lock_kernel()/unlock_kernel() in pre_vfs_rename() were redundant for |
| 1335 |
|
2.6 kernels. |
| 1336 |
|
|
| 1337 |
|
Locking order in pre_vfs_link() and pre_vfs_unlink() for 2.4 kernels |
| 1338 |
|
after 2.4.33 were different from before 2.4.32 . |
TOMOYO
Parent Directory
Revision Log
Patch