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From ea60248d99abb8fed9f7a2b1ab7325c5523b8562 Mon Sep 17 00:00:00 2001
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From: Ludwig Krispenz <lkrispen@redhat.com>
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Date: Mon, 3 Apr 2017 09:32:20 +0200
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Subject: [PATCH] fix for cve 2017-2668 - simple return text if suffix not
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found
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1436575
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Signed-off-by: Mark Reynolds <mreynolds@redhat.com>
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---
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ldap/servers/slapd/defbackend.c | 75 ++---------------------------------------
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1 file changed, 2 insertions(+), 73 deletions(-)
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diff --git a/ldap/servers/slapd/defbackend.c b/ldap/servers/slapd/defbackend.c
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index 6fd74a3..6cd2c04 100644
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--- a/ldap/servers/slapd/defbackend.c
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+++ b/ldap/servers/slapd/defbackend.c
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@@ -166,50 +166,7 @@ defbackend_abandon( Slapi_PBlock *pb )
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}
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-#define DEFBE_NO_SUCH_SUFFIX "No such suffix"
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-/*
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- * Generate a "No such suffix" return text
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- * Example:
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- * cn=X,dc=bogus,dc=com ==> "No such suffix (dc=bogus,dc=com)"
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- * if the last rdn starts with "dc=", print all last dc= rdn's.
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- * cn=X,cn=bogus ==> "No such suffix (cn=bogus)"
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- * otherwise, print the very last rdn.
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- * cn=X,z=bogus ==> "No such suffix (x=bogus)"
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- * it is true even if it is an invalid rdn.
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- * cn=X,bogus ==> "No such suffix (bogus)"
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- * another example of invalid rdn.
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- */
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-static void
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-_defbackend_gen_returntext(char *buffer, size_t buflen, char **dns)
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-{
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- int dnidx;
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- int sidx;
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- struct suffix_repeat {
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- char *suffix;
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- int size;
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- } candidates[] = {
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- {"dc=", 3}, /* dc could be repeated. otherwise the last rdn is used. */
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- {NULL, 0}
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- };
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- PR_snprintf(buffer, buflen, "%s (", DEFBE_NO_SUCH_SUFFIX);
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- for (dnidx = 0; dns[dnidx]; dnidx++) ; /* finding the last */
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- dnidx--; /* last rdn */
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- for (sidx = 0; candidates[sidx].suffix; sidx++) {
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- if (!PL_strncasecmp(dns[dnidx], candidates[sidx].suffix, candidates[sidx].size)) {
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- while (!PL_strncasecmp(dns[--dnidx], candidates[sidx].suffix, candidates[sidx].size)) ;
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- PL_strcat(buffer, dns[++dnidx]); /* the first "dn=", e.g. */
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- for (++dnidx; dns[dnidx]; dnidx++) {
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- PL_strcat(buffer, ",");
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- PL_strcat(buffer, dns[dnidx]);
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- }
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- PL_strcat(buffer, ")");
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- return; /* finished the task */
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- }
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- }
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- PL_strcat(buffer, dns[dnidx]);
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- PL_strcat(buffer, ")");
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- return;
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-}
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+#define DEFBE_NO_SUCH_SUFFIX "No suffix for bind dn found"
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static int
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defbackend_bind( Slapi_PBlock *pb )
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@@ -231,36 +188,8 @@ defbackend_bind( Slapi_PBlock *pb )
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slapi_counter_increment(g_get_global_snmp_vars()->ops_tbl.dsAnonymousBinds);
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rc = SLAPI_BIND_ANONYMOUS;
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} else {
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- Slapi_DN *sdn = NULL;
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- char *suffix = NULL;
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- char **dns = NULL;
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-
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- if (pb->pb_op) {
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- sdn = operation_get_target_spec(pb->pb_op);
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- if (sdn) {
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- dns = slapi_ldap_explode_dn(slapi_sdn_get_dn(sdn), 0);
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- if (dns) {
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- size_t dnlen = slapi_sdn_get_ndn_len(sdn);
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- size_t len = dnlen + sizeof(DEFBE_NO_SUCH_SUFFIX) + 4;
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- suffix = slapi_ch_malloc(len);
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- if (dnlen) {
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- _defbackend_gen_returntext(suffix, len, dns);
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- } else {
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- PR_snprintf(suffix, len, "%s", DEFBE_NO_SUCH_SUFFIX);
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- }
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- }
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- }
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- }
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- if (suffix) {
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- slapi_pblock_set(pb, SLAPI_PB_RESULT_TEXT, suffix);
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- } else {
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- slapi_pblock_set(pb, SLAPI_PB_RESULT_TEXT, DEFBE_NO_SUCH_SUFFIX);
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- }
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+ slapi_pblock_set(pb, SLAPI_PB_RESULT_TEXT, DEFBE_NO_SUCH_SUFFIX);
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send_ldap_result(pb, LDAP_INVALID_CREDENTIALS, NULL, "", 0, NULL);
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- if (dns) {
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- slapi_ldap_value_free(dns);
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- }
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- slapi_ch_free_string(&suffix);
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rc = SLAPI_BIND_FAIL;
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}
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--
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2.9.3
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