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cbdf0e37a6
krb5/2011-002-patch.txt
Nalin Dahyabhai be633bbbb2 - add upstream patches to fix standalone kpropd exiting if the per-client 
child process exits with an error (MITKRB5-SA-2011-001), a hang or crash
  in the KDC when using the LDAP kdb backend, and an uninitialized pointer
  use in the KDC (MITKRB5-SA-2011-002) (CVE-2010-4022, #664009,
  CVE-2011-0281, #668719, CVE-2011-0282, #668726, CVE-2011-0283, #670567)
2011-02-08 14:37:19 -05:00

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diff --git a/src/kdc/dispatch.c b/src/kdc/dispatch.c
index 63ff3b3..b4a90bb 100644
--- a/src/kdc/dispatch.c
+++ b/src/kdc/dispatch.c
@@ -115,7 +115,8 @@ dispatch(void *cb, struct sockaddr *local_saddr, const krb5_fulladdr *from,
kdc_insert_lookaside(pkt, *response);
#endif
- if (is_tcp == 0 && (*response)->length > max_dgram_reply_size) {
+ if (is_tcp == 0 && *response != NULL &&
+ (*response)->length > max_dgram_reply_size) {
too_big_for_udp:
krb5_free_data(kdc_context, *response);
retval = make_too_big_error(response);
diff --git a/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap.h b/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap.h
index d677bb2..a356907 100644
--- a/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap.h
+++ b/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap.h
@@ -102,14 +102,18 @@ extern void prepend_err_str (krb5_context ctx, const char *s, krb5_error_code er
#define LDAP_SEARCH(base, scope, filter, attrs) LDAP_SEARCH_1(base, scope, filter, attrs, CHECK_STATUS)
#define LDAP_SEARCH_1(base, scope, filter, attrs, status_check) \
- do { \
- st = ldap_search_ext_s(ld, base, scope, filter, attrs, 0, NULL, NULL, &timelimit, LDAP_NO_LIMIT, &result); \
- if (translate_ldap_error(st, OP_SEARCH) == KRB5_KDB_ACCESS_ERROR) { \
- tempst = krb5_ldap_rebind(ldap_context, &ldap_server_handle); \
- if (ldap_server_handle) \
- ld = ldap_server_handle->ldap_handle; \
- } \
- }while (translate_ldap_error(st, OP_SEARCH) == KRB5_KDB_ACCESS_ERROR && tempst == 0); \
+ tempst = 0; \
+ st = ldap_search_ext_s(ld, base, scope, filter, attrs, 0, NULL, \
+ NULL, &timelimit, LDAP_NO_LIMIT, &result); \
+ if (translate_ldap_error(st, OP_SEARCH) == KRB5_KDB_ACCESS_ERROR) { \
+ tempst = krb5_ldap_rebind(ldap_context, &ldap_server_handle); \
+ if (ldap_server_handle) \
+ ld = ldap_server_handle->ldap_handle; \
+ if (tempst == 0) \
+ st = ldap_search_ext_s(ld, base, scope, filter, attrs, 0, \
+ NULL, NULL, &timelimit, \
+ LDAP_NO_LIMIT, &result); \
+ } \
\
if (status_check != IGNORE_STATUS) { \
if (tempst != 0) { \
diff --git a/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap_conn.c b/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap_conn.c
index 82b0333..84e80ee 100644
--- a/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap_conn.c
+++ b/src/plugins/kdb/ldap/libkdb_ldap/kdb_ldap_conn.c
@@ -302,6 +302,7 @@ krb5_ldap_rebind(krb5_ldap_context *ldap_context,
{
krb5_ldap_server_handle *handle = *ldap_server_handle;
+ ldap_unbind_ext_s(handle->ldap_handle, NULL, NULL);
if ((ldap_initialize(&handle->ldap_handle, handle->server_info->server_name) != LDAP_SUCCESS)
|| (krb5_ldap_bind(ldap_context, handle) != LDAP_SUCCESS))
return krb5_ldap_request_next_handle_from_pool(ldap_context, ldap_server_handle);
diff --git a/src/plugins/kdb/ldap/libkdb_ldap/ldap_misc.c b/src/plugins/kdb/ldap/libkdb_ldap/ldap_misc.c
index 86fa4d1..0f49c86 100644
--- a/src/plugins/kdb/ldap/libkdb_ldap/ldap_misc.c
+++ b/src/plugins/kdb/ldap/libkdb_ldap/ldap_misc.c
@@ -487,12 +487,11 @@ is_principal_in_realm(krb5_ldap_context *ldap_context,
* portion, then the first portion of the principal name SHOULD be
* "krbtgt". All this check is done in the immediate block.
*/
- if (searchfor->length == 2)
- if ((strncasecmp(searchfor->data[0].data, "krbtgt",
- FIND_MAX(searchfor->data[0].length, strlen("krbtgt"))) == 0) &&
- (strncasecmp(searchfor->data[1].data, defrealm,
- FIND_MAX(searchfor->data[1].length, defrealmlen)) == 0))
+ if (searchfor->length == 2) {
+ if (data_eq_string(searchfor->data[0], "krbtgt") &&
+ data_eq_string(searchfor->data[1], defrealm))
return 0;
+ }
/* first check the length, if they are not equal, then they are not same */
if (strlen(defrealm) != searchfor->realm.length)
diff --git a/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c b/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
index 140db1a..552e39a 100644
--- a/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
+++ b/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
@@ -78,10 +78,10 @@ krb5_error_code
krb5_ldap_get_principal(krb5_context context, krb5_const_principal searchfor,
unsigned int flags, krb5_db_entry **entry_ptr)
{
- char *user=NULL, *filter=NULL, **subtree=NULL;
+ char *user=NULL, *filter=NULL, *filtuser=NULL;
unsigned int tree=0, ntrees=1, princlen=0;
krb5_error_code tempst=0, st=0;
- char **values=NULL, *cname=NULL;
+ char **values=NULL, **subtree=NULL, *cname=NULL;
LDAP *ld=NULL;
LDAPMessage *result=NULL, *ent=NULL;
krb5_ldap_context *ldap_context=NULL;
@@ -115,12 +115,18 @@ krb5_ldap_get_principal(krb5_context context, krb5_const_principal searchfor,
if ((st=krb5_ldap_unparse_principal_name(user)) != 0)
goto cleanup;
- princlen = strlen(FILTER) + strlen(user) + 2 + 1; /* 2 for closing brackets */
+ filtuser = ldap_filter_correct(user);
+ if (filtuser == NULL) {
+ st = ENOMEM;
+ goto cleanup;
+ }
+
+ princlen = strlen(FILTER) + strlen(filtuser) + 2 + 1; /* 2 for closing brackets */
if ((filter = malloc(princlen)) == NULL) {
st = ENOMEM;
goto cleanup;
}
- snprintf(filter, princlen, FILTER"%s))", user);
+ snprintf(filter, princlen, FILTER"%s))", filtuser);
if ((st = krb5_get_subtree_info(ldap_context, &subtree, &ntrees)) != 0)
goto cleanup;
@@ -207,6 +213,9 @@ cleanup:
if (user)
free(user);
+ if (filtuser)
+ free(filtuser);
+
if (cname)
free(cname);
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