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2003-10-16 Pierre Humblet <pierre.humblet@ieee.org>

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* syscalls.cc (seteuid32): Always construct a default DACL including
	the new sid, Admins and SYSTEM and copy it to the new thread token.
	* security.cc (create_token): Use a NULL default DACL in NtCreateToken.
This commit is contained in:
Pierre Humblet 2003-10-16 23:20:41 +00:00
parent abfc9c412c
commit 9808b5c420
2 changed files with 16 additions and 23 deletions
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10
winsup/cygwin/security.cc
View File

@ -815,8 +815,7 @@ create_token (cygsid &usersid, user_groups &new_groups, struct passwd *pw)
PTOKEN_PRIVILEGES privs = NULL;
TOKEN_OWNER owner;
TOKEN_PRIMARY_GROUP pgrp;
char acl_buf[MAX_DACL_LEN (5)];
TOKEN_DEFAULT_DACL dacl;
TOKEN_DEFAULT_DACL dacl = {};
TOKEN_SOURCE source;
TOKEN_STATISTICS stats;
memcpy (source.SourceName, "Cygwin.1", 8);
@ -905,13 +904,6 @@ create_token (cygsid &usersid, user_groups &new_groups, struct passwd *pw)
if (!(privs = get_priv_list (lsa, usersid, tmp_gsids)))
goto out;
/* Create default dacl. */
if (!sec_acl ((PACL) acl_buf, false, false,
tmp_gsids.contains (well_known_admins_sid) ?
well_known_admins_sid : usersid))
goto out;
dacl.DefaultDacl = (PACL) acl_buf;
/* Let's be heroic... */
ret = NtCreateToken (&token, TOKEN_ALL_ACCESS, &oa, TokenImpersonation,
&auth_luid, &exp, &user, new_tok_gsids, privs, &owner,

19
winsup/cygwin/syscalls.cc
View File

@ -2121,6 +2121,8 @@ seteuid32 (__uid32_t uid)
HANDLE ptok, new_token = INVALID_HANDLE_VALUE;
struct passwd * pw_new;
BOOL token_is_internal, issamesid;
char dacl_buf[MAX_DACL_LEN (5)];
TOKEN_DEFAULT_DACL tdacl = {};
pw_new = internal_getpwuid (uid);
if (!wincap.has_security () && pw_new)
@ -2161,19 +2163,14 @@ seteuid32 (__uid32_t uid)
debug_printf ("Found token %d", new_token);
/* Set process def dacl to allow access to impersonated token */
if (cygheap->user.current_token != new_token)
if (sec_acl ((PACL) dacl_buf, true, true, usersid))
{
char dacl_buf[MAX_DACL_LEN (5)];
if (sec_acl ((PACL) dacl_buf, true, false, usersid))
{
TOKEN_DEFAULT_DACL tdacl;
tdacl.DefaultDacl = (PACL) dacl_buf;
if (!SetTokenInformation (ptok, TokenDefaultDacl,
&tdacl, sizeof dacl_buf))
debug_printf ("SetTokenInformation"
"(TokenDefaultDacl): %E");
}
}
/* If no impersonation token is available, try to
authenticate using NtCreateToken () or subauthentication. */
@ -2193,7 +2190,7 @@ seteuid32 (__uid32_t uid)
CloseHandle (cygheap->user.internal_token);
cygheap->user.internal_token = new_token;
}
else if (new_token != ptok)
if (new_token != ptok)
{
/* Avoid having HKCU use default user */
load_registry_hive (usersid);
@ -2204,11 +2201,15 @@ seteuid32 (__uid32_t uid)
debug_printf ("SetTokenInformation(user.token, "
"TokenOwner): %E");
/* Try setting primary group in token to current group */
if (!SetTokenInformation (new_token,
TokenPrimaryGroup,
if (!SetTokenInformation (new_token, TokenPrimaryGroup,
&groups.pgsid, sizeof (cygsid)))
debug_printf ("SetTokenInformation(user.token, "
"TokenPrimaryGroup): %E");
/* Try setting default DACL */
if (tdacl.DefaultDacl
&& !SetTokenInformation (new_token, TokenDefaultDacl,
&tdacl, sizeof (tdacl)))
debug_printf ("SetTokenInformation (TokenDefaultDacl): %E");
}
CloseHandle (ptok);