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From f45e6d84b75dcd649e18c9256c136cda354de6fd Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 17:06:39 +0000
Subject: [PATCH 5/6] lanp: Fix buffer overflows in get_lan_param_select
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Partial fix for CVE-2020-5208, see
https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
The `get_lan_param_select` function is missing a validation check on the
response’s `data_len`, which it then returns to caller functions, where
stack buffer overflow can occur.
Upstream-Status: Backport[https://github.com/ipmitool/ipmitool/commit/d45572d71e70840e0d4c50bf48218492b79c1a10]
CVE: CVE-2020-5208
[Make some changes to apply it]
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
---
lib/ipmi_lanp.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/lib/ipmi_lanp.c b/lib/ipmi_lanp.c
index 65d881b..022c7f1 100644
--- a/lib/ipmi_lanp.c
+++ b/lib/ipmi_lanp.c
@@ -1809,7 +1809,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
/* set new ipaddr */
memcpy(data+3, temp, 4);
printf("Setting LAN Alert %d IP Address to %d.%d.%d.%d\n", alert,
@@ -1824,7 +1824,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
/* set new macaddr */
memcpy(data+7, temp, 6);
printf("Setting LAN Alert %d MAC Address to "
@@ -1838,7 +1838,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
if (strncasecmp(argv[1], "def", 3) == 0 ||
strncasecmp(argv[1], "default", 7) == 0) {
@@ -1864,7 +1864,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
if (strncasecmp(argv[1], "on", 2) == 0 ||
strncasecmp(argv[1], "yes", 3) == 0) {
@@ -1889,7 +1889,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
if (strncasecmp(argv[1], "pet", 3) == 0) {
printf("Setting LAN Alert %d destination to PET Trap\n", alert);
@@ -1917,7 +1917,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
if (str2uchar(argv[1], &data[2]) != 0) {
lprintf(LOG_ERR, "Invalid time: %s", argv[1]);
@@ -1933,7 +1933,7 @@ ipmi_lan_alert_set(struct ipmi_intf * intf, uint8_t chan, uint8_t alert,
if (p == NULL) {
return (-1);
}
- memcpy(data, p->data, p->data_len);
+ memcpy(data, p->data, __min(p->data_len, sizeof(data)));
if (str2uchar(argv[1], &data[3]) != 0) {
lprintf(LOG_ERR, "Invalid retry: %s", argv[1]);
--
2.23.0
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