new file mode 100644
@@ -0,0 +1,85 @@
+From 80a6ce8ddb02477cd724cd5b2944791aaddb702a Mon Sep 17 00:00:00 2001
+From: Alexander Sosedkin <asosedkin@redhat.com>
+Date: Tue, 9 Aug 2022 16:05:53 +0200
+Subject: [PATCH] auth/rsa: side-step potential side-channel
+
+Signed-off-by: Alexander Sosedkin <asosedkin@redhat.com>
+Signed-off-by: Hubert Kario <hkario@redhat.com>
+Tested-by: Hubert Kario <hkario@redhat.com>
+Upstream-Status: Backport [https://gitlab.com/gnutls/gnutls/-/commit/80a6ce8ddb02477cd724cd5b2944791aaddb702a
+ https://gitlab.com/gnutls/gnutls/-/commit/4b7ff428291c7ed77c6d2635577c83a43bbae558]
+CVE: CVE-2023-0361
+Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
+---
+ lib/auth/rsa.c | 30 +++---------------------------
+ 1 file changed, 3 insertions(+), 27 deletions(-)
+
+diff --git a/lib/auth/rsa.c b/lib/auth/rsa.c
+index 8108ee8..858701f 100644
+--- a/lib/auth/rsa.c
++++ b/lib/auth/rsa.c
+@@ -155,13 +155,10 @@ static int
+ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data,
+ size_t _data_size)
+ {
+- const char attack_error[] = "auth_rsa: Possible PKCS #1 attack\n";
+ gnutls_datum_t ciphertext;
+ int ret, dsize;
+ ssize_t data_size = _data_size;
+ volatile uint8_t ver_maj, ver_min;
+- volatile uint8_t check_ver_min;
+- volatile uint32_t ok;
+
+ #ifdef ENABLE_SSL3
+ if (get_num_version(session) == GNUTLS_SSL3) {
+@@ -187,7 +184,6 @@ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data,
+
+ ver_maj = _gnutls_get_adv_version_major(session);
+ ver_min = _gnutls_get_adv_version_minor(session);
+- check_ver_min = (session->internals.allow_wrong_pms == 0);
+
+ session->key.key.data = gnutls_malloc(GNUTLS_MASTER_SIZE);
+ if (session->key.key.data == NULL) {
+@@ -206,10 +202,9 @@ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data,
+ return ret;
+ }
+
+- ret =
+- gnutls_privkey_decrypt_data2(session->internals.selected_key,
+- 0, &ciphertext, session->key.key.data,
+- session->key.key.size);
++ gnutls_privkey_decrypt_data2(session->internals.selected_key,
++ 0, &ciphertext, session->key.key.data,
++ session->key.key.size);
+ /* After this point, any conditional on failure that cause differences
+ * in execution may create a timing or cache access pattern side
+ * channel that can be used as an oracle, so treat very carefully */
+@@ -225,25 +220,6 @@ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data,
+ * Vlastimil Klima, Ondej Pokorny and Tomas Rosa.
+ */
+
+- /* ok is 0 in case of error and 1 in case of success. */
+-
+- /* if ret < 0 */
+- ok = CONSTCHECK_EQUAL(ret, 0);
+- /* session->key.key.data[0] must equal ver_maj */
+- ok &= CONSTCHECK_EQUAL(session->key.key.data[0], ver_maj);
+- /* if check_ver_min then session->key.key.data[1] must equal ver_min */
+- ok &= CONSTCHECK_NOT_EQUAL(check_ver_min, 0) &
+- CONSTCHECK_EQUAL(session->key.key.data[1], ver_min);
+-
+- if (ok) {
+- /* call logging function unconditionally so all branches are
+- * indistinguishable for timing and cache access when debug
+- * logging is disabled */
+- _gnutls_no_log("%s", attack_error);
+- } else {
+- _gnutls_debug_log("%s", attack_error);
+- }
+-
+ /* This is here to avoid the version check attack
+ * discussed above.
+ */
+--
+2.25.1
+
@@ -22,6 +22,7 @@ SHRT_VER = "${@d.getVar('PV').split('.')[0]}.${@d.getVar('PV').split('.')[1]}"
SRC_URI = "https://www.gnupg.org/ftp/gcrypt/gnutls/v${SHRT_VER}/gnutls-${PV}.tar.xz \
file://arm_eabi.patch \
file://CVE-2022-2509.patch \
+ file://CVE-2023-0361.patch \
"
SRC_URI[sha256sum] = "e6adbebcfbc95867de01060d93c789938cf89cc1d1f6ef9ef661890f6217451f"
Remove branching that depends on secret data. since the `ok` variable isn't used any more, we can remove all code used to calculate it Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com> --- .../gnutls/gnutls/CVE-2023-0361.patch | 85 +++++++++++++++++++ meta/recipes-support/gnutls/gnutls_3.7.4.bb | 1 + 2 files changed, 86 insertions(+) create mode 100644 meta/recipes-support/gnutls/gnutls/CVE-2023-0361.patch