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Red Hat Bugzilla – Attachment 616508 Details for
Bug 859918
CVE-2012-4445 hostapd, wpa_supplicant: DoS (abort) by processing certain fragmented EAP-TLS messages
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[patch]
Proposed eap_server_tls_process_fragment() patch by Jouni Malinen from the hostapd project
hostapd_eap_tls_msg_len_validation.diff (text/plain), 872 bytes, created by
Jan Lieskovsky
on 2012-09-24 11:58:16 UTC
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Description:
Proposed eap_server_tls_process_fragment() patch by Jouni Malinen from the hostapd project
Filename:
MIME Type:
Creator:
Jan Lieskovsky
Created:
2012-09-24 11:58:16 UTC
Size:
872 bytes
patch
obsolete
>diff --git a/src/eap_server/eap_server_tls_common.c b/src/eap_server/eap_server_tls_common.c >index 31be2ec..9efb5b2 100644 >--- a/src/eap_server/eap_server_tls_common.c >+++ b/src/eap_server/eap_server_tls_common.c >@@ -228,6 +228,14 @@ static int eap_server_tls_process_fragment(struct eap_ssl_data *data, > return -1; > } > >+ if (len > message_length) { >+ wpa_printf(MSG_INFO, "SSL: Too much data (%d bytes) in " >+ "first fragment of frame (TLS Message " >+ "Length %d bytes)", >+ (int) len, (int) message_length); >+ return -1; >+ } >+ > data->tls_in = wpabuf_alloc(message_length); > if (data->tls_in == NULL) { > wpa_printf(MSG_DEBUG, "SSL: No memory for message");
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