| 16 |
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|
| 17 |
This project was very inspired by the comic "Card Captor SAKURA", |
This project was very inspired by the comic "Card Captor SAKURA", |
| 18 |
one of the CLAMP's masterworks. |
one of the CLAMP's masterworks. |
|
The names SAKURA and TOMOYO and SYAORAN were borrowed from the comic |
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with the heartfelt thanks to CLAMP. |
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| 19 |
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| 20 |
ChangeLog: |
ChangeLog: |
| 21 |
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|
| 193 |
@ Fix handling of trailing '\*' in PathMatchesToPattern(). |
@ Fix handling of trailing '\*' in PathMatchesToPattern(). |
| 194 |
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|
| 195 |
PathMatchesToPattern("/tmp/", "/tmp/\*") returned true |
PathMatchesToPattern("/tmp/", "/tmp/\*") returned true |
| 196 |
because "\*" matches to "more than or equals to 0 character |
because "\*" matches "zero or more repetitions of characters |
| 197 |
until '/' or end". But since this is a comparison between |
until '/' or end". But since this is a comparison between |
| 198 |
directory and non-directory, this should not match. |
directory and non-directory, this should not match. |
| 199 |
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|
| 404 |
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|
| 405 |
@ Change behavior of pathname pattern matching. |
@ Change behavior of pathname pattern matching. |
| 406 |
|
|
| 407 |
Until now, it was impossible to use patterns like "\*.txt" |
Until now, it was impossible to use patterns like "\*.txt" because |
| 408 |
because "\*" matched to more than 0 characters until next '/'. |
"\*" matched zero or more repetitions of characters until next '/'. |
| 409 |
Now, "\*" matches to more than 0 characters. |
Now, "\*" matches zero or more repetitions of characters. |
| 410 |
|
|
| 411 |
Until now, it was impossible to use patterns like "\$00" |
Until now, it was impossible to use patterns like "\$00" |
| 412 |
because "\$" matched to more than 1 digits until next |
because "\$" matched one or more repetitions of digits until next |
| 413 |
non digit character. |
non digit character. |
| 414 |
Now, "\$" matches to more than 1 digits. |
Now, "\$" matches one or more repetitions of digits. |
| 415 |
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|
| 416 |
Also, new patterns "\x" "\X" "\a" "\A" "\@" are added. |
Also, new patterns "\x" "\X" "\a" "\A" "\@" are added. |
| 417 |
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| 428 |
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|
| 429 |
@ Change matching rule for CheckFileACL(). |
@ Change matching rule for CheckFileACL(). |
| 430 |
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|
| 431 |
Until now, only first entry that matched to the requested pathname |
Until now, only first entry that matched the requested pathname |
| 432 |
was used for permission checking. For example, two entries |
was used for permission checking. For example, two entries |
| 433 |
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|
| 434 |
"2 /tmp/file-\$.txt" |
"2 /tmp/file-\$.txt" |
| 444 |
This may potentially cause trouble because the result of |
This may potentially cause trouble because the result of |
| 445 |
permission checks depends on the order of entries. |
permission checks depends on the order of entries. |
| 446 |
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|
| 447 |
Now, all entries that matched to the requested pathname |
Now, all entries that matched the requested pathname |
| 448 |
are used for permission checking so that the result of |
are used for permission checking so that the result of |
| 449 |
permission checks doesn't depend on the order of entries. |
permission checks doesn't depend on the order of entries. |
| 450 |
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|
| 492 |
"6 /home/\*/\* if task.uid=path1.uid" |
"6 /home/\*/\* if task.uid=path1.uid" |
| 493 |
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|
| 494 |
allows the domain to read-write user's home directory |
allows the domain to read-write user's home directory |
| 495 |
only when the file's owner matches to the process's uid. |
only when the file's owner matches the process's uid. |
| 496 |
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|
| 497 |
Fix 2006/08/22 |
Fix 2006/08/22 |
| 498 |
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|
| 758 |
if /some/program is called from "some_domain" domain. |
if /some/program is called from "some_domain" domain. |
| 759 |
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| 760 |
"some_domain" can be just the last component of domainname. |
"some_domain" can be just the last component of domainname. |
| 761 |
For example, giving "/bin/mail" as "some_domain" matches to |
For example, giving "/bin/mail" as "some_domain" matches |
| 762 |
all domains whose domainname ends with "/bin/mail". |
all domains whose domainname ends with "/bin/mail". |
| 763 |
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|
| 764 |
Fix 2007/01/19 |
Fix 2007/01/19 |
| 1918 |
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| 1919 |
This problem happens on little endian platforms (e.g. x86). |
This problem happens on little endian platforms (e.g. x86). |
| 1920 |
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Fix 2009/04/20 |
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@ Update recvmsg() hooks. |
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Since 1.5.0, I was doing network access control for incoming UDP and RAW |
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packets inside skb_recv_datagram(). But to synchronize with LSM version, |
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|
I moved ccs_recv_datagram_permission() hook from skb_recv_datagram() to |
|
|
udp_recvmsg()/udpv6_recvmsg()/raw_recvmsg()/rawv6_recvmsg() with name |
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change to ccs_recvmsg_permission(). |
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|
| 1921 |
Fix 2009/05/08 |
Fix 2009/05/08 |
| 1922 |
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|
| 1923 |
@ Add condition for symlink's target pathname. |
@ Add condition for symlink's target pathname. |
| 1963 |
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| 1964 |
I modified to unlock the mutex before calling get_fs_type(). |
I modified to unlock the mutex before calling get_fs_type(). |
| 1965 |
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| 1966 |
Version 1.6.8 2009/05/?? Feature enhancement release. |
Fix 2009/05/20 |
| 1967 |
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| 1968 |
|
@ Update recvmsg() hooks. |
| 1969 |
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|
| 1970 |
|
Since 1.5.0, I was doing network access control for incoming UDP and RAW |
| 1971 |
|
packets inside skb_recv_datagram(). But to synchronize with LSM version, |
| 1972 |
|
I moved ccs_recv_datagram_permission() hook from skb_recv_datagram() to |
| 1973 |
|
udp_recvmsg()/udpv6_recvmsg()/raw_recvmsg()/rawv6_recvmsg() with name |
| 1974 |
|
change to ccs_recvmsg_permission(). |
| 1975 |
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| 1976 |
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Version 1.6.8 2009/05/28 Feature enhancement release. |
| 1977 |
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| 1978 |
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Fix 2009/07/03 |
| 1979 |
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| 1980 |
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@ Fix buffer overrun when used with CONFIG_SLOB=y . |
| 1981 |
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| 1982 |
|
Since 1.6.7 , ccs_allocate_execve_entry() was requesting for only 4000 |
| 1983 |
|
bytes while the comment says it is 4096 bytes. This may lead to buffer |
| 1984 |
|
overrun when slob allocator is used, for slob allocator allocates exactly |
| 1985 |
|
4000 bytes whereas slab and slub allocators allocate 4096 bytes. |
| 1986 |
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|
| 1987 |
|
Fix 2009/09/01 |
| 1988 |
|
|
| 1989 |
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@ Add garbage collector support. |
| 1990 |
|
|
| 1991 |
|
Until now, it was impossible to release memory used by deleted policy. |
| 1992 |
|
I added SRCU based garbage collector so that memory used by deleted |
| 1993 |
|
policy will be automatically released. |
| 1994 |
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|
| 1995 |
|
@ Remove word length limitation and line length limitation. |
| 1996 |
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|
| 1997 |
|
Until now, the max length of a word is 4000 and the max length of a line |
| 1998 |
|
is 8192. To be able to handle longer pathnames, I removed these |
| 1999 |
|
limitations. Now, the max length (except the domainname and |
| 2000 |
|
argv[]/envp[]) is 128K (which is the max amount of memory kmalloc() |
| 2001 |
|
can allocate in most environments). |
| 2002 |
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|
| 2003 |
|
@ Support more fine grained profile configuration. |
| 2004 |
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|
| 2005 |
|
Profile was reconstructed. |
| 2006 |
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|
| 2007 |
|
@ Support more fine grained parameters restrictions. |
| 2008 |
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|
| 2009 |
|
"allow_create", "allow_mkdir", "allow_mkfifo", "allow_mksock" check |
| 2010 |
|
create mode. "allow_mkblock" and "allow_mkchar" check create mode and |
| 2011 |
|
major/minor device numbers. "allow_chmod" check new mode. "allow_chown" |
| 2012 |
|
checks new owner. "allow_chgrp" checks new group. |
| 2013 |
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|
| 2014 |
|
@ Allow number grouping. |
| 2015 |
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|
| 2016 |
|
To help specifying numeric values, a new directive "number_group" is |
| 2017 |
|
introduced. |
| 2018 |
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|
| 2019 |
|
@ Remove "alias" directive and "allow_argv0" directive. |
| 2020 |
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|
| 2021 |
|
Until now, "allow_execute" used dereferenced pathname if it is a symlink |
| 2022 |
|
unless explicitly specified by "alias" directive. |
| 2023 |
|
|
| 2024 |
|
Now, "allow_execute" uses symlink's pathname if it is a symlink. |
| 2025 |
|
"exec.realpath" in "if" clause checks the dereferenced pathname. |
| 2026 |
|
"exec.argv[0]" in "if" clause checks the invocation name. |
| 2027 |
|
|
| 2028 |
|
@ Remove /proc/ccs/system_policy and /etc/ccs/system_policy.conf . |
| 2029 |
|
|
| 2030 |
|
"deny_autobind" was moved to /proc/ccs/exception_policy and |
| 2031 |
|
/etc/ccs/exception_policy.conf . Other directives were moved to |
| 2032 |
|
/proc/ccs/domain_policy and /etc/ccs/domain_policy.conf . |
| 2033 |
|
|
| 2034 |
|
@ Remove syaoran filesystem. |
| 2035 |
|
|
| 2036 |
|
Since "allow_create"/"allow_mkdir"/"allow_mkfifo"/"allow_mksock"/ |
| 2037 |
|
"allow_mkblock"/"allow_mkchar"/"allow_chmod"/"allow_chown"/"allow_chgrp" |
| 2038 |
|
can restrict mode changes and owner/group changes, there is no need to |
| 2039 |
|
restrict these changes at filesystem level. |
| 2040 |
|
|
| 2041 |
|
Thus, I removed syaoran filesystem. |
| 2042 |
|
|
| 2043 |
|
@ Reduce spinlocks. |
| 2044 |
|
|
| 2045 |
|
Until now, TOMOYO was using own list for detecting memory leak. But as |
| 2046 |
|
kernel 2.6.31 introduced memory leak detection mechanism |
| 2047 |
|
( CONFIG_DEBUG_KMEMLEAK ), TOMOYO no longer needs to use own list. |
| 2048 |
|
|
| 2049 |
|
I removed the list to ruduce use of spinlocks. |
| 2050 |
|
|
| 2051 |
|
@ Rewrite ccs-patch-2.\*.diff . |
| 2052 |
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|
| 2053 |
|
ccs-patch-2.\*.diff was rewriteen like LSM hooks. |
| 2054 |
|
|
| 2055 |
|
@ Don't check "allow_read/write" for open-for-ioctl-only. |
| 2056 |
|
|
| 2057 |
|
open(pathname, 3) means open for ioctl() only. |
| 2058 |
|
Until now, TOMOYO was checking "allow_read/write" for open(pathname, 3). |
| 2059 |
|
But since TOMOYO checks "allow_ioctl" for ioctl(), I modified not to |
| 2060 |
|
require "allow_read/write" for open(pathname, 3). |
| 2061 |
|
|
| 2062 |
|
@ Add missing sigqueue() and tgsigqueue() hooks. |
| 2063 |
|
|
| 2064 |
|
Until now, kill(), tkill(), tgkill() had hooks but sigqueue() and |
| 2065 |
|
tgsigqueue() didn't. |
| 2066 |
|
|
| 2067 |
|
@ Move files from fs/ to security/ccsecurity. |
| 2068 |
|
|
| 2069 |
|
Config menu section changed from "File systems" to "Security options". |
| 2070 |
|
|
| 2071 |
|
Kernel config symbols changed from CONFIG_SAKURA CONFIG_TOMOYO |
| 2072 |
|
CONFIG_SYAORAN to CONFIG_CCSECURITY . |
| 2073 |
|
|
| 2074 |
|
@ Add global PID to audit logs. |
| 2075 |
|
|
| 2076 |
|
ccs-queryd was using domainname for reaching the domain which the process |
| 2077 |
|
belongs to, but the domain could be deleted while ccs-queryd is handling |
| 2078 |
|
policy violation. If the domain is deleted, ccs-queryd no longer can |
| 2079 |
|
reach the domain by domainname. Thus, ccs-queryd now uses PID for |
| 2080 |
|
reaching the domain which the process belongs to. |
| 2081 |
|
|
| 2082 |
|
Kernel 2.6.24 introduced PID namespace. The PID in access logs generated |
| 2083 |
|
by a process inside a container is useless for ccs-queryd for reaching |
| 2084 |
|
the domain which the process belongs to. |
| 2085 |
|
|
| 2086 |
|
Thus, I added global PID in audit logs. |
| 2087 |
|
|
| 2088 |
|
@ Transit to new domain before do_execve() succeeds. |
| 2089 |
|
|
| 2090 |
|
Permission checks for interpreters and environment variables are |
| 2091 |
|
done using new domain. In order to be allow ccs-queryd to reach the new |
| 2092 |
|
domain via global PID, I reverted "Don't transit to new domain until |
| 2093 |
|
do_execve() succeeds." made on 2008/10/07. |
| 2094 |
|
|
| 2095 |
|
Version 1.7.0 2009/09/03 Feature enhancement release. |
| 2096 |
|
|
| 2097 |
|
Fix 2009/09/04 |
| 2098 |
|
|
| 2099 |
|
@ Fix wrong ccs_profile() calls. |
| 2100 |
|
|
| 2101 |
|
I can't call ccs_profile() for profile existence test because |
| 2102 |
|
ccs_profile() never returns NULL. |
| 2103 |
|
|
| 2104 |
|
Fix 2009/09/06 |
| 2105 |
|
|
| 2106 |
|
@ Fix wrong error code in ccs_try_alt_exec(). |
| 2107 |
|
|
| 2108 |
|
ccs_try_alt_exec() was returning ENOMEM when kmalloc() failed. |
| 2109 |
|
It needs to return -ENOMEM to fail. |
| 2110 |
|
|
| 2111 |
|
Fix 2009/09/10 |
| 2112 |
|
|
| 2113 |
|
@ Do not check umount() permission for mount(MS_MOVE) requests. |
| 2114 |
|
|
| 2115 |
|
Until 1.6.x , umount() restriction was black listing. In 1.7.0 , it is |
| 2116 |
|
white listing. This change caused "mount --move old new" requests to |
| 2117 |
|
require "allow_unmount old" permission in addition to |
| 2118 |
|
"allow_mount old new --move 0" permission. |
| 2119 |
|
But we don't want to allow umount(old) requests when we want to allow |
| 2120 |
|
only mount(old, new, MS_MOVE) requests. Thus, I modified not to check |
| 2121 |
|
"allow_unmount old" permission for mount(old, new, MS_MOVE) requests. |
| 2122 |
|
|
| 2123 |
|
Fix 2009/09/11 |
| 2124 |
|
|
| 2125 |
|
@ Support recursive match operators. |
| 2126 |
|
|
| 2127 |
|
Until now, ccs_path_matches_pattern() did not support recursive |
| 2128 |
|
comparison. Thus, users had to repeat "/\*" when they want to specify |
| 2129 |
|
recursively. |
| 2130 |
|
|
| 2131 |
|
I introduced "\{" and "\}" as repetition operator. |
| 2132 |
|
To ensure consistency with TOMOYO's '/'-tokenized pattern matching rules |
| 2133 |
|
and "\-" operator, only "/\{dir\}/" sequences (where dir does not contain |
| 2134 |
|
'/') is permitted. |
| 2135 |
|
|
| 2136 |
|
Fix 2009/09/24 |
| 2137 |
|
|
| 2138 |
|
@ Don't check chmod/chown capability for requests from kernel. |
| 2139 |
|
|
| 2140 |
|
Until now, ccs_setattr_permission() was inserted in notify_change(). |
| 2141 |
|
But notify_change() is also called by requests from kernel (e.g. UnionFS) |
| 2142 |
|
and it made difficult to use TOMOYO on UnionFS. |
| 2143 |
|
|
| 2144 |
|
Thus, I moved ccs_capable() checks from ccs_setattr_permission() to |
| 2145 |
|
ccs_chmod_permission() and ccs_chown_permission(), and removed |
| 2146 |
|
ccs_setattr_permission(). |
| 2147 |
|
|
| 2148 |
|
Fix 2009/09/25 |
| 2149 |
|
|
| 2150 |
|
@ Embed more information into audit logs. |
| 2151 |
|
|
| 2152 |
|
Until now, /proc/ccs/grant_log /proc/ccs/reject_log /proc/ccs/query were |
| 2153 |
|
not printing file's information (e.g. file's uid/gid/mode). |
| 2154 |
|
|
| 2155 |
|
Recently, users who started using "if" clause expect that the learning |
| 2156 |
|
mode automatically adds various conditions like "if task.uid=path1.uid". |
| 2157 |
|
|
| 2158 |
|
But the profile will become too complicated if I support all possible |
| 2159 |
|
conditions. Thus, I added all information which is enough to generate |
| 2160 |
|
"if" clause with all possible conditions from audit logs. |
| 2161 |
|
|
| 2162 |
|
Now, the learning mode got different usage. Users can specify |
| 2163 |
|
"CONFIG::learning={ max_entry=0 }" in the profile. All requests which |
| 2164 |
|
are not permitted by policy will be sent to /proc/ccs/reject_log with |
| 2165 |
|
"mode=learning" header lines. Users can selectively append conditions |
| 2166 |
|
and append to the policy using "/usr/sbin/ccs-loadpolicy -d". |
| 2167 |
|
The learning mode with "CONFIG::learning={ max_entry=0 }" is almost |
| 2168 |
|
the same with the permissive mode, only difference is "mode=learning" |
| 2169 |
|
and "mode=permissive". |
| 2170 |
|
|
| 2171 |
|
Fix 2009/10/05 |
| 2172 |
|
|
| 2173 |
|
@ Fix size truncation bug at ccs_memcmp(). |
| 2174 |
|
|
| 2175 |
|
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 |
| 2177 |
|
(incorrect result) or read overrun (CPU stall). |
| 2178 |
|
|
| 2179 |
|
ccs_memcmp() should use "size_t" for size parameter because size of |
| 2180 |
|
"struct ccs_condition" may exceed 256 bytes if complicated condition was |
| 2181 |
|
given. |
| 2182 |
|
|
| 2183 |
|
Fix 2009/10/08 |
| 2184 |
|
|
| 2185 |
|
@ Add CONFIG_CCSECURITY_DEFAULT_LOADER option. |
| 2186 |
|
|
| 2187 |
|
I made the default policy loader's pathname ( /sbin/ccs-init ) |
| 2188 |
|
configurable. |
| 2189 |
|
|
| 2190 |
|
@ Add CONFIG_CCSECURITY_ALTERNATIVE_TRIGGER option. |
| 2191 |
|
|
| 2192 |
|
Some environments do not have /sbin/init . In such environments, we need |
| 2193 |
|
to use different program's pathname (e.g. /init or /linuxrc ) as |
| 2194 |
|
activation trigger. |
| 2195 |
|
|
| 2196 |
|
Thus, I made the alternative trigger ( /sbin/ccs-start ) configurable. |
| 2197 |
|
|
| 2198 |
|
Fix 2009/11/02 |
| 2199 |
|
|
| 2200 |
|
@ Fix buffer contention. |
| 2201 |
|
|
| 2202 |
|
A permission like |
| 2203 |
|
|
| 2204 |
|
allow_env PATH if exec.envp["PATH"]="/" |
| 2205 |
|
|
| 2206 |
|
was not working since I was using the same buffer for both environment |
| 2207 |
|
variable's name and value. |
| 2208 |
|
|
| 2209 |
|
Fix 2009/11/03 |
| 2210 |
|
|
| 2211 |
|
@ Fix memory leak in ccs_write_address_group_policy(). |
| 2212 |
|
|
| 2213 |
|
I forgot to call kfree() if same entry was added. |
| 2214 |
|
|
| 2215 |
|
@ Reduce mutexes. |
| 2216 |
|
|
| 2217 |
|
I was using mutex_lock()/mutex_unlock() so that I can use |
| 2218 |
|
atomic_dec_and_test() for removing an element from a list. |
| 2219 |
|
I moved that operation to garbage collector in order to reduce frequency |
| 2220 |
|
of mutex_lock()/mutex_unlock() calls. |
TOMOYO
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