f55551038a
(MITKRB5-SA-2011-006, bnc#719393) CVE-2011-1527, CVE-2011-1528, CVE-2011-1529 - fix kdc remote denial of service (MITKRB5-SA-2011-006, bnc#719393) CVE-2011-1527, CVE-2011-1528, CVE-2011-1529 OBS-URL: https://build.opensuse.org/package/show/network/krb5?expand=0&rev=51
76 lines
3.0 KiB
Plaintext
76 lines
3.0 KiB
Plaintext
diff --git a/src/plugins/kdb/db2/lockout.c b/src/plugins/kdb/db2/lockout.c
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index b473611..50c60b7 100644
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--- a/src/plugins/kdb/db2/lockout.c
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+++ b/src/plugins/kdb/db2/lockout.c
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@@ -169,6 +169,9 @@ krb5_db2_lockout_audit(krb5_context context,
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return 0;
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}
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+ if (entry == NULL)
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+ return 0;
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+
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if (!db_ctx->disable_lockout) {
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code = lookup_lockout_policy(context, entry, &max_fail,
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&failcnt_interval, &lockout_duration);
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@@ -176,6 +179,15 @@ krb5_db2_lockout_audit(krb5_context context,
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return code;
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}
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+ /*
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+ * Don't continue to modify the DB for an already locked account.
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+ * (In most cases, status will be KRB5KDC_ERR_CLIENT_REVOKED, and
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+ * this check is unneeded, but in rare cases, we can fail with an
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+ * integrity error or preauth failure before a policy check.)
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+ */
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+ if (locked_check_p(context, stamp, max_fail, lockout_duration, entry))
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+ return 0;
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+
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/* Only mark the authentication as successful if the entry
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* required preauthentication, otherwise we have no idea. */
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if (status == 0 && (entry->attributes & KRB5_KDB_REQUIRES_PRE_AUTH)) {
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diff --git a/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c b/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
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index 552e39a..c2f44ab 100644
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--- a/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
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+++ b/src/plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
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@@ -105,6 +105,7 @@ krb5_ldap_get_principal(krb5_context context, krb5_const_principal searchfor,
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CHECK_LDAP_HANDLE(ldap_context);
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if (is_principal_in_realm(ldap_context, searchfor) != 0) {
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+ st = KRB5_KDB_NOENTRY;
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krb5_set_error_message (context, st, "Principal does not belong to realm");
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goto cleanup;
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}
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diff --git a/src/plugins/kdb/ldap/libkdb_ldap/lockout.c b/src/plugins/kdb/ldap/libkdb_ldap/lockout.c
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index a218dc7..fd164dd 100644
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--- a/src/plugins/kdb/ldap/libkdb_ldap/lockout.c
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+++ b/src/plugins/kdb/ldap/libkdb_ldap/lockout.c
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@@ -165,6 +165,9 @@ krb5_ldap_lockout_audit(krb5_context context,
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return 0;
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}
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+ if (entry == NULL)
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+ return 0;
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+
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if (!ldap_context->disable_lockout) {
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code = lookup_lockout_policy(context, entry, &max_fail,
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&failcnt_interval,
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@@ -173,9 +176,16 @@ krb5_ldap_lockout_audit(krb5_context context,
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return code;
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}
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- entry->mask = 0;
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+ /*
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+ * Don't continue to modify the DB for an already locked account.
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+ * (In most cases, status will be KRB5KDC_ERR_CLIENT_REVOKED, and
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+ * this check is unneeded, but in rare cases, we can fail with an
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+ * integrity error or preauth failure before a policy check.)
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+ */
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+ if (locked_check_p(context, stamp, max_fail, lockout_duration, entry))
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+ return 0;
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- assert (!locked_check_p(context, stamp, max_fail, lockout_duration, entry));
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+ entry->mask = 0;
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/* Only mark the authentication as successful if the entry
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* required preauthentication, otherwise we have no idea. */
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