mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
r4582: finally worked out what is going on with the inherited ACLs test and win2003. It is a
win2003 bug!
This new test code works against w2k, and against longhorn, but fails
against w2k3. When tested against w2k3 it allows a open with an access
mask that should be denied by the given ACL, after setting up the ACL
using inheritance. Note that only the very specific
SEC_RIGHTS_FILE_ALL mask incorrectly succeeds, so they must have a
special case for that mask. Maybe its an optimisation gone wrong?
I don't know if there are any serious security implications to this,
but it is pretty clearly wrong, and has been fixed in longhorn.
(This used to be commit 4f9fd767db)
This commit is contained in:
Andrew Tridgell
Gerald (Jerry) Carter
parent
b8b0927455
commit
468b3fcef2
@ -101,12 +101,13 @@ static BOOL test_sd(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd)) {
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printf("security descriptors don't match!\n");
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if (!security_acl_equal(q.query_secdesc.out.sd->dacl, sd->dacl)) {
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd);
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ret = False;
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}
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printf("remove it again\n");
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@ -120,12 +121,13 @@ static BOOL test_sd(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd)) {
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printf("security descriptors don't match!\n");
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if (!security_acl_equal(q.query_secdesc.out.sd->dacl, sd->dacl)) {
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd);
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ret = False;
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}
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done:
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@ -211,12 +213,13 @@ static BOOL test_nttrans_create(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd)) {
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printf("security descriptors don't match!\n");
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if (!security_acl_equal(q.query_secdesc.out.sd->dacl, sd->dacl)) {
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd);
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ret = False;
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}
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done:
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@ -342,11 +345,12 @@ static BOOL test_creator_sid(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd)) {
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printf("security descriptors don't match!\n");
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd);
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ret = False;
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}
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printf("try open for write\n");
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@ -401,11 +405,12 @@ static BOOL test_creator_sid(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd2)) {
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printf("security descriptors don't match!\n");
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd2);
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ret = False;
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}
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@ -580,11 +585,12 @@ static BOOL test_generic_bits(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd2)) {
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printf("security descriptors don't match!\n");
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd2);
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ret = False;
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}
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io.ntcreatex.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
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@ -627,11 +633,12 @@ static BOOL test_generic_bits(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd2)) {
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printf("security descriptors don't match!\n");
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd2);
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ret = False;
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}
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io.ntcreatex.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
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@ -718,11 +725,12 @@ static BOOL test_generic_bits(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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if (!security_descriptor_equal(q.query_secdesc.out.sd, sd2)) {
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printf("security descriptors don't match!\n");
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printf("%s: security descriptors don't match!\n", __location__);
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printf("got:\n");
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NDR_PRINT_DEBUG(security_descriptor, q.query_secdesc.out.sd);
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printf("expected:\n");
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NDR_PRINT_DEBUG(security_descriptor, sd2);
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ret = False;
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}
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io.ntcreatex.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
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@ -747,6 +755,118 @@ done:
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}
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/*
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see what access bits the owner of a file always gets
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*/
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static BOOL test_owner_bits(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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{
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NTSTATUS status;
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union smb_open io;
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const char *fname = BASEDIR "\\generic.txt";
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BOOL ret = True;
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int fnum = -1, i;
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union smb_fileinfo q;
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union smb_setfileinfo set;
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struct security_descriptor *sd, *sd_orig;
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const char *owner_sid;
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BOOL has_restore_privilege;
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BOOL has_take_ownership_privilege;
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uint32_t expected_bits;
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printf("TESTING FILE OWNER BITS\n");
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io.generic.level = RAW_OPEN_NTCREATEX;
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io.ntcreatex.in.root_fid = 0;
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io.ntcreatex.in.flags = 0;
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io.ntcreatex.in.access_mask =
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SEC_STD_READ_CONTROL |
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SEC_STD_WRITE_DAC |
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SEC_STD_WRITE_OWNER;
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io.ntcreatex.in.create_options = 0;
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io.ntcreatex.in.file_attr = FILE_ATTRIBUTE_NORMAL;
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io.ntcreatex.in.share_access =
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NTCREATEX_SHARE_ACCESS_READ |
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NTCREATEX_SHARE_ACCESS_WRITE;
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io.ntcreatex.in.alloc_size = 0;
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io.ntcreatex.in.open_disposition = NTCREATEX_DISP_OPEN_IF;
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io.ntcreatex.in.impersonation = NTCREATEX_IMPERSONATION_ANONYMOUS;
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io.ntcreatex.in.security_flags = 0;
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io.ntcreatex.in.fname = fname;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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CHECK_STATUS(status, NT_STATUS_OK);
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fnum = io.ntcreatex.out.fnum;
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printf("get the original sd\n");
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q.query_secdesc.level = RAW_FILEINFO_SEC_DESC;
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q.query_secdesc.in.fnum = fnum;
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q.query_secdesc.in.secinfo_flags = SECINFO_DACL | SECINFO_OWNER;
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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sd_orig = q.query_secdesc.out.sd;
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owner_sid = dom_sid_string(mem_ctx, sd_orig->owner_sid);
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status = smblsa_sid_check_privilege(cli,
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owner_sid,
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sec_privilege_name(SEC_PRIV_RESTORE));
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has_restore_privilege = NT_STATUS_IS_OK(status);
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if (!NT_STATUS_IS_OK(status)) {
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printf("smblsa_sid_check_privilege - %s\n", nt_errstr(status));
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}
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printf("SEC_PRIV_RESTORE - %s\n", has_restore_privilege?"Yes":"No");
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status = smblsa_sid_check_privilege(cli,
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owner_sid,
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sec_privilege_name(SEC_PRIV_TAKE_OWNERSHIP));
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has_take_ownership_privilege = NT_STATUS_IS_OK(status);
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if (!NT_STATUS_IS_OK(status)) {
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printf("smblsa_sid_check_privilege - %s\n", nt_errstr(status));
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}
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printf("SEC_PRIV_TAKE_OWNERSHIP - %s\n", has_restore_privilege?"Yes":"No");
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sd = security_descriptor_create(mem_ctx,
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NULL, NULL,
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owner_sid,
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SEC_ACE_TYPE_ACCESS_ALLOWED,
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SEC_FILE_WRITE_DATA,
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0,
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NULL);
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set.set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
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set.set_secdesc.file.fnum = fnum;
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set.set_secdesc.in.secinfo_flags = SECINFO_DACL;
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set.set_secdesc.in.sd = sd;
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status = smb_raw_setfileinfo(cli->tree, &set);
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CHECK_STATUS(status, NT_STATUS_OK);
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expected_bits = SEC_FILE_WRITE_DATA | SEC_FILE_READ_ATTRIBUTE;
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for (i=0;i<16;i++) {
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uint32 bit = (1<<i);
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io.ntcreatex.in.access_mask = bit;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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if (expected_bits & bit) {
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CHECK_STATUS(status, NT_STATUS_OK);
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CHECK_ACCESS_FLAGS(io.ntcreatex.out.fnum, bit | SEC_FILE_READ_ATTRIBUTE);
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smbcli_close(cli->tree, io.ntcreatex.out.fnum);
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} else {
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CHECK_STATUS(status, NT_STATUS_ACCESS_DENIED);
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}
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}
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printf("put back original sd\n");
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set.set_secdesc.in.sd = sd_orig;
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status = smb_raw_setfileinfo(cli->tree, &set);
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CHECK_STATUS(status, NT_STATUS_OK);
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done:
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smbcli_close(cli->tree, fnum);
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smbcli_unlink(cli->tree, fname);
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return ret;
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}
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/*
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test the inheritance of ACL flags onto new files and directories
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@ -1051,6 +1171,52 @@ static BOOL test_inheritance(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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}
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}
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printf("testing access checks on inherited create with %s\n", fname1);
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sd = security_descriptor_create(mem_ctx,
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NULL, NULL,
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owner_sid,
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SEC_ACE_TYPE_ACCESS_ALLOWED,
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SEC_FILE_WRITE_DATA | SEC_STD_WRITE_DAC,
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SEC_ACE_FLAG_OBJECT_INHERIT,
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SID_WORLD,
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SEC_ACE_TYPE_ACCESS_ALLOWED,
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SEC_FILE_ALL | SEC_STD_ALL,
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0,
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NULL);
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set.set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
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set.set_secdesc.file.fnum = fnum;
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set.set_secdesc.in.secinfo_flags = SECINFO_DACL;
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set.set_secdesc.in.sd = sd;
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status = smb_raw_setfileinfo(cli->tree, &set);
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CHECK_STATUS(status, NT_STATUS_OK);
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io.ntcreatex.in.fname = fname1;
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io.ntcreatex.in.create_options = 0;
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io.ntcreatex.in.access_mask = SEC_RIGHTS_FILE_ALL;
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io.ntcreatex.in.open_disposition = NTCREATEX_DISP_CREATE;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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CHECK_STATUS(status, NT_STATUS_OK);
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fnum2 = io.ntcreatex.out.fnum;
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CHECK_ACCESS_FLAGS(fnum2, SEC_RIGHTS_FILE_ALL);
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q.query_secdesc.in.fnum = fnum2;
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q.query_secdesc.in.secinfo_flags = SECINFO_DACL | SECINFO_OWNER;
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status = smb_raw_fileinfo(cli->tree, mem_ctx, &q);
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CHECK_STATUS(status, NT_STATUS_OK);
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smbcli_close(cli->tree, fnum2);
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io.ntcreatex.in.open_disposition = NTCREATEX_DISP_OPEN;
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io.ntcreatex.in.access_mask = SEC_RIGHTS_FILE_ALL;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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CHECK_STATUS(status, NT_STATUS_ACCESS_DENIED);
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io.ntcreatex.in.access_mask = SEC_FILE_WRITE_DATA;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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CHECK_STATUS(status, NT_STATUS_OK);
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fnum2 = io.ntcreatex.out.fnum;
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CHECK_ACCESS_FLAGS(fnum2, SEC_FILE_WRITE_DATA | SEC_FILE_READ_ATTRIBUTE);
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smbcli_close(cli->tree, fnum2);
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printf("put back original sd\n");
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set.set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
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set.set_secdesc.file.fnum = fnum;
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@ -1060,8 +1226,20 @@ static BOOL test_inheritance(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
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CHECK_STATUS(status, NT_STATUS_OK);
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smbcli_close(cli->tree, fnum);
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smbcli_rmdir(cli->tree, dname);
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io.ntcreatex.in.access_mask = SEC_RIGHTS_FILE_ALL;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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CHECK_STATUS(status, NT_STATUS_ACCESS_DENIED);
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io.ntcreatex.in.access_mask = SEC_FILE_WRITE_DATA;
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status = smb_raw_open(cli->tree, mem_ctx, &io);
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CHECK_STATUS(status, NT_STATUS_OK);
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fnum2 = io.ntcreatex.out.fnum;
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CHECK_ACCESS_FLAGS(fnum2, SEC_FILE_WRITE_DATA | SEC_FILE_READ_ATTRIBUTE);
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smbcli_close(cli->tree, fnum2);
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smbcli_unlink(cli->tree, fname1);
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smbcli_rmdir(cli->tree, dname);
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done:
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smbcli_close(cli->tree, fnum);
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@ -1092,11 +1270,18 @@ BOOL torture_raw_acls(void)
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ret &= test_nttrans_create(cli, mem_ctx);
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ret &= test_creator_sid(cli, mem_ctx);
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ret &= test_generic_bits(cli, mem_ctx);
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ret &= test_owner_bits(cli, mem_ctx);
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ret &= test_inheritance(cli, mem_ctx);
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printf("\n *** NOTE! need to add dynamic inheritance test **\n");
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#if 0
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ret &= test_inheritance_dynamic(cli, mem_ctx);
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/*
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open questions:
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- does "create with ACL" have to obey the ACL that is supplied?
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- does "create with ACL" look at the owner_sid and group_sid at all?
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*/
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#endif
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smb_raw_exit(cli->session);
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