diff options
Diffstat (limited to 'meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0003-EAP-pwd-peer-Fix-reassembly-buffer-handling.patch')
| -rw-r--r-- | meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0003-EAP-pwd-peer-Fix-reassembly-buffer-handling.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0003-EAP-pwd-peer-Fix-reassembly-buffer-handling.patch b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0003-EAP-pwd-peer-Fix-reassembly-buffer-handling.patch new file mode 100644 index 0000000000..95ea809ef2 --- /dev/null +++ b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0003-EAP-pwd-peer-Fix-reassembly-buffer-handling.patch @@ -0,0 +1,48 @@ +From d2d1a324ce937628e4d9d9999fe113819b7d4478 Mon Sep 17 00:00:00 2001 +From: Jouni Malinen <jouni@codeaurora.org> +Date: Wed, 17 Apr 2019 02:21:20 +0300 +Subject: [PATCH 3/3] EAP-pwd peer: Fix reassembly buffer handling + +Unexpected fragment might result in data->inbuf not being allocated +before processing and that could have resulted in NULL pointer +dereference. Fix that by explicitly checking for data->inbuf to be +available before using it. + +Signed-off-by: Jouni Malinen <jouni@codeaurora.org> +Signed-off-by: Adrian Bunk <bunk@stusta.de> +Upstream-Status: Backport +CVE: CVE-2019-11555 +--- + src/eap_peer/eap_pwd.c | 9 ++++++++- + 1 file changed, 8 insertions(+), 1 deletion(-) + +diff --git a/src/eap_peer/eap_pwd.c b/src/eap_peer/eap_pwd.c +index 46894a5..76fcad4 100644 +--- a/src/eap_peer/eap_pwd.c ++++ b/src/eap_peer/eap_pwd.c +@@ -932,6 +932,13 @@ eap_pwd_process(struct eap_sm *sm, void *priv, struct eap_method_ret *ret, + * buffer and ACK the fragment + */ + if (EAP_PWD_GET_MORE_BIT(lm_exch) || data->in_frag_pos) { ++ if (!data->inbuf) { ++ wpa_printf(MSG_DEBUG, ++ "EAP-pwd: No buffer for reassembly"); ++ ret->methodState = METHOD_DONE; ++ ret->decision = DECISION_FAIL; ++ return NULL; ++ } + data->in_frag_pos += len; + if (data->in_frag_pos > wpabuf_size(data->inbuf)) { + wpa_printf(MSG_INFO, "EAP-pwd: Buffer overflow attack " +@@ -958,7 +965,7 @@ eap_pwd_process(struct eap_sm *sm, void *priv, struct eap_method_ret *ret, + /* + * we're buffering and this is the last fragment + */ +- if (data->in_frag_pos) { ++ if (data->in_frag_pos && data->inbuf) { + wpa_printf(MSG_DEBUG, "EAP-pwd: Last fragment, %d bytes", + (int) len); + pos = wpabuf_head_u8(data->inbuf); +-- +2.7.4 + |