diff --git a/backport-CVE-2019-13456.patch b/backport-CVE-2019-13456.patch
new file mode 100644
index 0000000..0cd5873
--- /dev/null
+++ b/backport-CVE-2019-13456.patch
@@ -0,0 +1,38 @@
+From 3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa Mon Sep 17 00:00:00 2001
+From: Mathy Vanhoef <mathy.vanhoef@nyu.edu>
+Date: Wed, 5 Jun 2019 19:21:06 +0000
+Subject: [PATCH] EAP-pwd: fix side-channel leak where 1 in 2018 handshakes
+ fail
+
+Previously the Hunting and Pecking algorithm of EAP-pwd aborted when
+more than 10 iterations are needed. Every iteration has a 50% chance
+of finding the password element. This means one in every 2048 handshakes
+will fail, in which case an error frame is sent to the client. This
+event leaks information that can be abused in an offline password
+brute-force attack. More precisely, the adversary learns that all 10
+iterations failed for the given random EAP-pwd token. Using the same
+techniques as in the Dragonblood attack, this can be used to brute-force
+the password.
+
+This patch fixes the above issue by executing enough iterations such that
+the password element is always found eventually.
+
+Note that timing and cache leaks remain a risk against the current
+implementation of EAP-pwd.
+---
+ src/modules/rlm_eap/types/rlm_eap_pwd/eap_pwd.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/modules/rlm_eap/types/rlm_eap_pwd/eap_pwd.c b/src/modules/rlm_eap/types/rlm_eap_pwd/eap_pwd.c
+index c54f08c0308..d94851c3aa0 100644
+--- a/src/modules/rlm_eap/types/rlm_eap_pwd/eap_pwd.c
++++ b/src/modules/rlm_eap/types/rlm_eap_pwd/eap_pwd.c
+@@ -192,7 +192,7 @@ int compute_password_element (pwd_session_t *session, uint16_t grp_num,
+ 	}
+ 	ctr = 0;
+ 	while (1) {
+-		if (ctr > 10) {
++		if (ctr > 100) {
+ 			DEBUG("unable to find random point on curve for group %d, something's fishy", grp_num);
+ 			goto fail;
+ 		}
diff --git a/freeradius.spec b/freeradius.spec
index 224c87f..2279c95 100644
--- a/freeradius.spec
+++ b/freeradius.spec
@@ -4,7 +4,7 @@
 
 Name:           freeradius
 Version:        3.0.15
-Release:        20
+Release:        21
 Summary:        Remote Authentication Dial-In User Service
 
 License:        GPLv2+ and LGPLv2+
@@ -20,6 +20,7 @@ Patch6000:      CVE-2019-11234_1.patch
 Patch6001:      CVE-2019-11234_2.patch
 Patch6002:      CVE-2019-10143.patch
 Patch6003:      remove-unused-arguement.patch
+Patch6004:      backport-CVE-2019-13456.patch
 
 BuildRequires:  autoconf gdbm-devel openssl openssl-devel pam-devel zlib-devel net-snmp-devel
 BuildRequires:  net-snmp-utils readline-devel libpcap-devel systemd-units libtalloc-devel
@@ -435,6 +436,12 @@ exit 0
 %attr(640,root,radiusd) %config(noreplace) /etc/raddb/mods-available/ldap
 
 %changelog
+* Thu Jan 14 2021 xihaochen <xihaochen@huawei.com> - 3.0.15-21
+- Type: CVE
+- CVE: CVE-2019-13456 
+- SUG: NA
+- DESC: fix CVE-2019-13456
+
 * Fri Dec 25 2020 sunguoshuai <sunguoshuai@huawei.com> - 3.0.15-20
 - Remove unused arguement