| 2426 |
|
|
| 2427 |
Since 1.7.0 , ccs_write_pattern_policy() was by error accepting |
Since 1.7.0 , ccs_write_pattern_policy() was by error accepting |
| 2428 |
invalid pathname. |
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 |
|
@ Remove "if" and "; set" keyword. |
| 2574 |
|
|
| 2575 |
|
I removed need for specifying these keyword. |
| 2576 |
|
You can simply specify like below. |
| 2577 |
|
|
| 2578 |
|
file read /etc/shadow task.uid=0 |
| 2579 |
|
|
| 2580 |
|
@ Remove per-profile preference. |
| 2581 |
|
|
| 2582 |
|
I removed per profile preference in order to make code simpler. |
| 2583 |
|
|
| 2584 |
|
@ Allow controlling generation of access granted logs for per an entry |
| 2585 |
|
basis. |
| 2586 |
|
|
| 2587 |
|
I added per-entry flag which controls generation of grant logs because |
| 2588 |
|
Xen and KVM issues ioctl requests so frequently. For example, |
| 2589 |
|
|
| 2590 |
|
file ioctl /dev/null 0x5401 grant_log=no |
| 2591 |
|
|
| 2592 |
|
will suppress /proc/ccs/grant_log even if preference says grant_log=yes . |
| 2593 |
|
|
| 2594 |
|
file ioctl /dev/null 0x5401 grant_log=yes |
| 2595 |
|
|
| 2596 |
|
will generate /proc/ccs/grant_log even if preference says grant_log=no . |
| 2597 |
|
|
| 2598 |
|
file ioctl /dev/null 0x5401 |
| 2599 |
|
|
| 2600 |
|
will generate /proc/ccs/grant_log only if preference says grant_log=yes . |
| 2601 |
|
|
| 2602 |
|
This flag is intended for frequently accessed resources like |
| 2603 |
|
|
| 2604 |
|
file read /var/www/html/\{\*\}/\*.html grant_log=no |
| 2605 |
|
|
| 2606 |
|
. |
| 2607 |
|
|
| 2608 |
|
@ Automatically create domain by execve() even if enforcing mode. |
| 2609 |
|
|
| 2610 |
|
Until now, new domains are not created if the domain was not defined and |
| 2611 |
|
current domain is enforcing mode ("CONFIG::file::execute=enforcing"). |
| 2612 |
|
|
| 2613 |
|
To be able to restrict shell session without using "keep_domain", |
| 2614 |
|
I changed to create new domains automatically even if current domain is |
| 2615 |
|
enforcing mode. |
| 2616 |
|
|
| 2617 |
|
@ Replace "task.state" with "auto_domain_transition". |
| 2618 |
|
|
| 2619 |
|
task.state is difficult to use. Thus, I replaced task.state with |
| 2620 |
|
auto_domain_transition which performs domain transition instead of |
| 2621 |
|
changing current process's state variables. |
| 2622 |
|
|
| 2623 |
|
If domain transition failed, current process will be killed by SIGKILL |
| 2624 |
|
signal. This should not happen in normal circumstances, for you know the |
| 2625 |
|
domain to transit to and thereby you will define the domain beforehand |
| 2626 |
|
when you use "auto_domain_transition" keyword. |
| 2627 |
|
|
| 2628 |
|
@ Replace "allow_transit" with "task manual_domain_transition". |
| 2629 |
|
|
| 2630 |
|
I changed this directive to specify absolute domainname (e.g. |
| 2631 |
|
"<kernel> /usr/sbin/httpd //app=cgi1\040id=10000") rather than virtual |
| 2632 |
|
pathname (e.g. "//app=cgi1\040id=10000") because you know the domain to |
| 2633 |
|
transit to and thereby you will define the domain beforehand when you use |
| 2634 |
|
"task manual_domain_transition" directive. |
| 2635 |
|
|
| 2636 |
|
This change allows you to jump to arbitrary domain. |
| 2637 |
|
|
| 2638 |
|
@ Add "task auto_domain_transition". |
| 2639 |
|
|
| 2640 |
|
This is similar to "task manual_domain_transition", but is automatically |
| 2641 |
|
applied whenever conditions are met. For example, |
| 2642 |
|
|
| 2643 |
|
task auto_domain_transition <kernel> //./non-root task.uid!=0 |
| 2644 |
|
|
| 2645 |
|
will automatically jump to "<kernel> //./non-root" domain if current |
| 2646 |
|
process's UID is not 0 whereas |
| 2647 |
|
|
| 2648 |
|
task manual_domain_transition <kernel> //./non-root task.uid!=0 |
| 2649 |
|
|
| 2650 |
|
will jump to "<kernel> //./non-root" domain if current process's UID is |
| 2651 |
|
not 0 and current process wrote "<kernel> //./non-root" + '\n' to |
| 2652 |
|
/proc/ccs/.transition interface. |
| 2653 |
|
|
| 2654 |
|
If domain transition failed, current process will be killed by SIGKILL |
| 2655 |
|
signal. |
| 2656 |
|
|
| 2657 |
|
@ Optimize for object's size. |
| 2658 |
|
|
| 2659 |
|
I merged similar code in order to reduce object's filesize. |
| 2660 |
|
|
| 2661 |
|
Version 1.8.0 2010/XX/XX Feature enhancement release. |
TOMOYO
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