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- From e048e9c65a52f0879d482531e70735c1d314d43a Mon Sep 17 00:00:00 2001
- From: Chrostoper Ertl <chertl@microsoft.com>
- Date: Thu, 28 Nov 2019 17:06:39 +0000
- Subject: [PATCH 10/11] 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.
- ---
- 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 65d881bc5890..022c7f1605ed 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]);
- --
- 2.27.0
-
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