diff options
Diffstat (limited to 'gnu/packages/patches/wpa-supplicant-2015-4-fix-pt3.patch')
| -rw-r--r-- | gnu/packages/patches/wpa-supplicant-2015-4-fix-pt3.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gnu/packages/patches/wpa-supplicant-2015-4-fix-pt3.patch b/gnu/packages/patches/wpa-supplicant-2015-4-fix-pt3.patch new file mode 100644 index 0000000000..963dac9270 --- /dev/null +++ b/gnu/packages/patches/wpa-supplicant-2015-4-fix-pt3.patch @@ -0,0 +1,54 @@ +Patch copied from http://w1.fi/security/2015-4/ + +From 477c74395acd0123340457ba6f15ab345d42016e Mon Sep 17 00:00:00 2001 +From: Jouni Malinen <j@w1.fi> +Date: Sat, 2 May 2015 19:23:04 +0300 +Subject: [PATCH 3/5] EAP-pwd peer: Fix Total-Length parsing for fragment + reassembly + +The remaining number of bytes in the message could be smaller than the +Total-Length field size, so the length needs to be explicitly checked +prior to reading the field and decrementing the len variable. This could +have resulted in the remaining length becoming negative and interpreted +as a huge positive integer. + +In addition, check that there is no already started fragment in progress +before allocating a new buffer for reassembling fragments. This avoid a +potential memory leak when processing invalid message. + +Signed-off-by: Jouni Malinen <j@w1.fi> +--- + src/eap_peer/eap_pwd.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +diff --git a/src/eap_peer/eap_pwd.c b/src/eap_peer/eap_pwd.c +index a629437..1d2079b 100644 +--- a/src/eap_peer/eap_pwd.c ++++ b/src/eap_peer/eap_pwd.c +@@ -866,11 +866,23 @@ eap_pwd_process(struct eap_sm *sm, void *priv, struct eap_method_ret *ret, + * if it's the first fragment there'll be a length field + */ + if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) { ++ if (len < 2) { ++ wpa_printf(MSG_DEBUG, ++ "EAP-pwd: Frame too short to contain Total-Length field"); ++ ret->ignore = TRUE; ++ return NULL; ++ } + tot_len = WPA_GET_BE16(pos); + wpa_printf(MSG_DEBUG, "EAP-pwd: Incoming fragments whose " + "total length = %d", tot_len); + if (tot_len > 15000) + return NULL; ++ if (data->inbuf) { ++ wpa_printf(MSG_DEBUG, ++ "EAP-pwd: Unexpected new fragment start when previous fragment is still in use"); ++ ret->ignore = TRUE; ++ return NULL; ++ } + data->inbuf = wpabuf_alloc(tot_len); + if (data->inbuf == NULL) { + wpa_printf(MSG_INFO, "Out of memory to buffer " +-- +1.9.1 + |