Apply patch by Jouni Malinen. We don't have CONFIG_EAP_PWD enabled so we are
not affected: EAP-pwd peer error path failure on unexpected Confirm message Published: November 10, 2015 Identifier: CVE-2015-5316 Latest version available from: http://w1.fi/security/2015-8/ Vulnerability A vulnerability was found in EAP-pwd peer implementation used in wpa_supplicant. If an EAP-pwd Confirm message is received unexpectedly before the Identity exchange, the error path processing ended up dereferencing a NULL pointer and terminating the process. For wpa_supplicant with EAP-pwd enabled in a network configuration profile, this could allow a denial of service attack by an attacker within radio range. Vulnerable versions/configurations wpa_supplicant v2.3-v2.5 with CONFIG_EAP_PWD=y in the build configuration (wpa_supplicant/.config) and EAP-pwd enabled in a network profile at runtime. Possible mitigation steps - Merge the following commits and rebuild wpa_supplicant: EAP-pwd peer: Fix error path for unexpected Confirm message This patch is available from http://w1.fi/security/2015-8/ - Update to wpa_supplicant v2.6 or newer, once available - Remove CONFIG_EAP_PWD=y from build configuration - Disable EAP-pwd in runtime configuration
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@ -187,6 +187,12 @@ static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
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end = ptr + key_len_total;
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end = ptr + key_len_total;
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wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
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wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
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if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
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wpa_msg(wpa_s, MSG_INFO,
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"WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
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return;
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}
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while (ptr + 1 < end) {
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while (ptr + 1 < end) {
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if (ptr + 2 + ptr[1] > end) {
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if (ptr + 2 + ptr[1] > end) {
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wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
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wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
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