[openwrt/openwrt] wolfssl: Backport fix for CVE-2021-3336

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-19.07:
https://git.openwrt.org/d5a8e8587893e63d97d59b51287972959cb73154

commit d5a8e8587893e63d97d59b51287972959cb73154
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Tue Feb 9 00:53:09 2021 +0100

    wolfssl: Backport fix for CVE-2021-3336
    
    This should fix CVE-2021-3336:
    DoTls13CertificateVerify in tls13.c in wolfSSL through 4.6.0 does not
    cease processing for certain anomalous peer behavior (sending an
    ED22519, ED448, ECC, or RSA signature without the corresponding
    certificate).
    
    The patch is backported from the upstream wolfssl development branch.
    
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
    (cherry picked from commit 1f559cafe5cc1193a5962d40a2d938c66c783171)
---
 package/libs/wolfssl/Makefile                      |  2 +-
 .../libs/wolfssl/patches/010-CVE-2021-3336.patch   | 53 ++++++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/package/libs/wolfssl/Makefile b/package/libs/wolfssl/Makefile
index 8bd9189e5e..9bc7e671b2 100644
--- a/package/libs/wolfssl/Makefile
+++ b/package/libs/wolfssl/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=wolfssl
 PKG_VERSION:=4.6.0-stable
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/wolfSSL/wolfssl/archive/v$(PKG_VERSION)
diff --git a/package/libs/wolfssl/patches/010-CVE-2021-3336.patch b/package/libs/wolfssl/patches/010-CVE-2021-3336.patch
new file mode 100644
index 0000000000..abb9bfdd9b
--- /dev/null
+++ b/package/libs/wolfssl/patches/010-CVE-2021-3336.patch
@@ -0,0 +1,53 @@
+From fad1e67677bf7797b6bd6e1f21a513c289d963a7 Mon Sep 17 00:00:00 2001
+From: Sean Parkinson <sean at wolfssl.com>
+Date: Thu, 21 Jan 2021 08:24:38 +1000
+Subject: [PATCH] TLS 1.3: ensure key for signature in CertificateVerify
+
+---
+ src/tls13.c | 18 +++++++++++++-----
+ 1 file changed, 13 insertions(+), 5 deletions(-)
+
+--- a/src/tls13.c
++++ b/src/tls13.c
+@@ -5624,28 +5624,36 @@ static int DoTls13CertificateVerify(WOLF
+         #ifdef HAVE_ED25519
+             if (args->sigAlgo == ed25519_sa_algo &&
+                                                   !ssl->peerEd25519KeyPresent) {
+-                WOLFSSL_MSG("Oops, peer sent ED25519 key but not in verify");
++                WOLFSSL_MSG("Peer sent ED22519 sig but not ED22519 cert");
++                ret = SIG_VERIFY_E;
++                goto exit_dcv;
+             }
+         #endif
+         #ifdef HAVE_ED448
+             if (args->sigAlgo == ed448_sa_algo && !ssl->peerEd448KeyPresent) {
+-                WOLFSSL_MSG("Oops, peer sent ED448 key but not in verify");
++                WOLFSSL_MSG("Peer sent ED448 sig but not ED448 cert");
++                ret = SIG_VERIFY_E;
++                goto exit_dcv;
+             }
+         #endif
+         #ifdef HAVE_ECC
+             if (args->sigAlgo == ecc_dsa_sa_algo &&
+                                                    !ssl->peerEccDsaKeyPresent) {
+-                WOLFSSL_MSG("Oops, peer sent ECC key but not in verify");
++                WOLFSSL_MSG("Peer sent ECC sig but not ECC cert");
++                ret = SIG_VERIFY_E;
++                goto exit_dcv;
+             }
+         #endif
+         #ifndef NO_RSA
+             if (args->sigAlgo == rsa_sa_algo) {
+-                WOLFSSL_MSG("Oops, peer sent PKCS#1.5 signature");
++                WOLFSSL_MSG("Peer sent PKCS#1.5 algo but not in certificate");
+                 ERROR_OUT(INVALID_PARAMETER, exit_dcv);
+             }
+             if (args->sigAlgo == rsa_pss_sa_algo &&
+                          (ssl->peerRsaKey == NULL || !ssl->peerRsaKeyPresent)) {
+-                WOLFSSL_MSG("Oops, peer sent RSA key but not in verify");
++                WOLFSSL_MSG("Peer sent RSA sig but not RSA cert");
++                ret = SIG_VERIFY_E;
++                goto exit_dcv;
+             }
+         #endif
+