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83 lines
2.8 KiB
83 lines
2.8 KiB
From e048e9c65a52f0879d482531e70735c1d314d43a Mon Sep 17 00:00:00 2001
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From: Chrostoper Ertl <chertl@microsoft.com>
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Date: Thu, 28 Nov 2019 17:06:39 +0000
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Subject: [PATCH 10/11] lanp: Fix buffer overflows in get_lan_param_select
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Partial fix for CVE-2020-5208, see
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https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
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The `get_lan_param_select` function is missing a validation check on the
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response’s `data_len`, which it then returns to caller functions, where
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stack buffer overflow can occur.
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---
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lib/ipmi_lanp.c | 14 +++++++-------
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1 file changed, 7 insertions(+), 7 deletions(-)
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--- a/lib/ipmi_lanp.c
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+++ b/lib/ipmi_lanp.c
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@@ -1809,7 +1809,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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/* set new ipaddr */
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memcpy(data+3, temp, 4);
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printf("Setting LAN Alert %d IP Address to %d.%d.%d.%d\n", alert,
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@@ -1824,7 +1824,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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/* set new macaddr */
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memcpy(data+7, temp, 6);
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printf("Setting LAN Alert %d MAC Address to "
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@@ -1838,7 +1838,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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if (strncasecmp(argv[1], "def", 3) == 0 ||
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strncasecmp(argv[1], "default", 7) == 0) {
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@@ -1864,7 +1864,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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if (strncasecmp(argv[1], "on", 2) == 0 ||
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strncasecmp(argv[1], "yes", 3) == 0) {
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@@ -1889,7 +1889,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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if (strncasecmp(argv[1], "pet", 3) == 0) {
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printf("Setting LAN Alert %d destination to PET Trap\n", alert);
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@@ -1917,7 +1917,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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if (str2uchar(argv[1], &data[2]) != 0) {
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lprintf(LOG_ERR, "Invalid time: %s", argv[1]);
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@@ -1933,7 +1933,7 @@ ipmi_lan_alert_set(struct ipmi_intf * in
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if (p == NULL) {
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return (-1);
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}
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- memcpy(data, p->data, p->data_len);
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+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
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if (str2uchar(argv[1], &data[3]) != 0) {
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lprintf(LOG_ERR, "Invalid retry: %s", argv[1]);
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