From b3e74778c65ba3ffc8a9b3133c87588ee5d18a74 Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 16:33:59 +0000
Subject: [PATCH] Fixes for CVE-2020-5208
see https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
This patch is combination of following commits:
pick e824c23316ae50beb7f7488f2055ac65e8b341f2 fru: Fix buffer overflow vulnerabilities
pick 840fb1cbb4fb365cb9797300e3374d4faefcdb10 fru: Fix buffer overflow in ipmi_spd_print_fru
pick 41d7026946fafbd4d1ec0bcaca3ea30a6e8eed22 session: Fix buffer overflow in ipmi_get_session_info
pick 9452be87181a6e83cfcc768b3ed8321763db50e4 channel: Fix buffer overflow
pick d45572d71e70840e0d4c50bf48218492b79c1a10 lanp: Fix buffer overflows in get_lan_param_select
pick 7ccea283dd62a05a320c1921e3d8d71a87772637 fru, sdr: Fix id_string buffer overflows
---
lib/dimm_spd.c | 9 ++++++++-
lib/ipmi_channel.c | 5 ++++-
lib/ipmi_fru.c | 35 ++++++++++++++++++++++++++++++++---
lib/ipmi_lanp.c | 14 +++++++-------
lib/ipmi_sdr.c | 40 ++++++++++++++++++++++++----------------
lib/ipmi_session.c | 12 ++++++++----
6 files changed, 83 insertions(+), 32 deletions(-)
diff --git a/lib/dimm_spd.c b/lib/dimm_spd.c
index 41e30db..68f3b4f 100644
--- a/lib/dimm_spd.c
+++ b/lib/dimm_spd.c
@@ -1621,7 +1621,7 @@ ipmi_spd_print_fru(struct ipmi_intf * intf, uint8_t id)
struct ipmi_rq req;
struct fru_info fru;
uint8_t *spd_data, msg_data[4];
- int len, offset;
+ uint32_t len, offset;
msg_data[0] = id;
@@ -1697,6 +1697,13 @@ ipmi_spd_print_fru(struct ipmi_intf * intf, uint8_t id)
}
len = rsp->data[0];
+ if(rsp->data_len < 1
+ || len > rsp->data_len - 1
+ || len > fru.size - offset)
+ {
+ printf(" Not enough buffer size");
+ return -1;
+ }
memcpy(&spd_data[offset], rsp->data + 1, len);
offset += len;
} while (offset < fru.size);
diff --git a/lib/ipmi_channel.c b/lib/ipmi_channel.c
index 3ae3104..80ba522 100644
--- a/lib/ipmi_channel.c
+++ b/lib/ipmi_channel.c
@@ -447,7 +447,10 @@ ipmi_get_channel_cipher_suites(struct ipmi_intf *intf, const char *payload_type,
lprintf(LOG_ERR, "Unable to Get Channel Cipher Suites");
return -1;
}
- if (rsp->ccode || rsp->data_len < 1) {
+ if (rsp->ccode
+ || rsp->data_len < 1
+ || rsp->data_len > sizeof(uint8_t) + MAX_CIPHER_SUITE_DATA_LEN)
+ {
lprintf(LOG_ERR, "Get Channel Cipher Suites failed: %s",
val2str(rsp->ccode, completion_code_vals));
return -1;
diff --git a/lib/ipmi_fru.c b/lib/ipmi_fru.c
index cf00eff..98bc984 100644
--- a/lib/ipmi_fru.c
+++ b/lib/ipmi_fru.c
@@ -615,7 +615,10 @@ int
read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
uint32_t offset, uint32_t length, uint8_t *frubuf)
{
- uint32_t off = offset, tmp, finish;
+ uint32_t off = offset;
+ uint32_t tmp;
+ uint32_t finish;
+ uint32_t size_left_in_buffer;
struct ipmi_rs * rsp;
struct ipmi_rq req;
uint8_t msg_data[4];
@@ -628,10 +631,12 @@ read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
finish = offset + length;
if (finish > fru->size) {
+ memset(frubuf + fru->size, 0, length - fru->size);
finish = fru->size;
lprintf(LOG_NOTICE, "Read FRU Area length %d too large, "
"Adjusting to %d",
offset + length, finish - offset);
+ length = finish - offset;
}
memset(&req, 0, sizeof(req));
@@ -667,6 +672,7 @@ read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
}
}
+ size_left_in_buffer = length;
do {
tmp = fru->access ? off >> 1 : off;
msg_data[0] = id;
@@ -707,9 +713,18 @@ read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
}
tmp = fru->access ? rsp->data[0] << 1 : rsp->data[0];
+ if(rsp->data_len < 1
+ || tmp > rsp->data_len - 1
+ || tmp > size_left_in_buffer)
+ {
+ printf(" Not enough buffer size");
+ return -1;
+ }
+
memcpy(frubuf, rsp->data + 1, tmp);
off += tmp;
frubuf += tmp;
+ size_left_in_buffer -= tmp;
/* sometimes the size returned in the Info command
* is too large. return 0 so higher level function
* still attempts to parse what was returned */
@@ -742,7 +757,9 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
uint32_t offset, uint32_t length, uint8_t *frubuf)
{
static uint32_t fru_data_rqst_size = 20;
- uint32_t off = offset, tmp, finish;
+ uint32_t off = offset;
+ uint32_t tmp, finish;
+ uint32_t size_left_in_buffer;
struct ipmi_rs * rsp;
struct ipmi_rq req;
uint8_t msg_data[4];
@@ -755,10 +772,12 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
finish = offset + length;
if (finish > fru->size) {
+ memset(frubuf + fru->size, 0, length - fru->size);
finish = fru->size;
lprintf(LOG_NOTICE, "Read FRU Area length %d too large, "
"Adjusting to %d",
offset + length, finish - offset);
+ length = finish - offset;
}
memset(&req, 0, sizeof(req));
@@ -773,6 +792,8 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
if (fru->access && fru_data_rqst_size > 16)
#endif
fru_data_rqst_size = 16;
+
+ size_left_in_buffer = length;
do {
tmp = fru->access ? off >> 1 : off;
msg_data[0] = id;
@@ -804,8 +825,16 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id,
}
tmp = fru->access ? rsp->data[0] << 1 : rsp->data[0];
+ if(rsp->data_len < 1
+ || tmp > rsp->data_len - 1
+ || tmp > size_left_in_buffer)
+ {
+ printf(" Not enough buffer size");
+ return -1;
+ }
memcpy((frubuf + off)-offset, rsp->data + 1, tmp);
off += tmp;
+ size_left_in_buffer -= tmp;
/* sometimes the size returned in the Info command
* is too large. return 0 so higher level function
@@ -3033,7 +3062,7 @@ ipmi_fru_print(struct ipmi_intf * intf, struct sdr_record_fru_locator * fru)
return 0;
memset(desc, 0, sizeof(desc));
- memcpy(desc, fru->id_string, fru->id_code & 0x01f);
+ memcpy(desc, fru->id_string, __min(fru->id_code & 0x01f, sizeof(desc)));
desc[fru->id_code & 0x01f] = 0;
printf("FRU Device Description : %s (ID %d)\n", desc, fru->device_id);
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]);
diff --git a/lib/ipmi_sdr.c b/lib/ipmi_sdr.c
index 0f6faab..9890132 100644
--- a/lib/ipmi_sdr.c
+++ b/lib/ipmi_sdr.c
@@ -2086,7 +2086,7 @@ ipmi_sdr_print_sensor_eventonly(struct ipmi_intf *intf,
return -1;
memset(desc, 0, sizeof (desc));
- snprintf(desc, (sensor->id_code & 0x1f) + 1, "%s", sensor->id_string);
+ snprintf(desc, sizeof(desc), "%.*s", (sensor->id_code & 0x1f) + 1, sensor->id_string);
if (verbose) {
printf("Sensor ID : %s (0x%x)\n",
@@ -2137,7 +2137,7 @@ ipmi_sdr_print_sensor_mc_locator(struct ipmi_intf *intf,
return -1;
memset(desc, 0, sizeof (desc));
- snprintf(desc, (mc->id_code & 0x1f) + 1, "%s", mc->id_string);
+ snprintf(desc, sizeof(desc), "%.*s", (mc->id_code & 0x1f) + 1, mc->id_string);
if (verbose == 0) {
if (csv_output)
@@ -2230,7 +2230,7 @@ ipmi_sdr_print_sensor_generic_locator(struct ipmi_intf *intf,
char desc[17];
memset(desc, 0, sizeof (desc));
- snprintf(desc, (dev->id_code & 0x1f) + 1, "%s", dev->id_string);
+ snprintf(desc, sizeof(desc), "%.*s", (dev->id_code & 0x1f) + 1, dev->id_string);
if (!verbose) {
if (csv_output)
@@ -2287,7 +2287,7 @@ ipmi_sdr_print_sensor_fru_locator(struct ipmi_intf *intf,
char desc[17];
memset(desc, 0, sizeof (desc));
- snprintf(desc, (fru->id_code & 0x1f) + 1, "%s", fru->id_string);
+ snprintf(desc, sizeof(desc), "%.*s", (fru->id_code & 0x1f) + 1, fru->id_string);
if (!verbose) {
if (csv_output)
@@ -2491,35 +2491,43 @@ ipmi_sdr_print_name_from_rawentry(struct ipmi_intf *intf, uint16_t id,
int rc =0;
char desc[17];
+ const char *id_string;
+ uint8_t id_code;
memset(desc, ' ', sizeof (desc));
switch ( type) {
case SDR_RECORD_TYPE_FULL_SENSOR:
record.full = (struct sdr_record_full_sensor *) raw;
- snprintf(desc, (record.full->id_code & 0x1f) +1, "%s",
- (const char *)record.full->id_string);
+ id_code = record.full->id_code;
+ id_string = record.full->id_string;
break;
+
case SDR_RECORD_TYPE_COMPACT_SENSOR:
record.compact = (struct sdr_record_compact_sensor *) raw ;
- snprintf(desc, (record.compact->id_code & 0x1f) +1, "%s",
- (const char *)record.compact->id_string);
+ id_code = record.compact->id_code;
+ id_string = record.compact->id_string;
break;
+
case SDR_RECORD_TYPE_EVENTONLY_SENSOR:
record.eventonly = (struct sdr_record_eventonly_sensor *) raw ;
- snprintf(desc, (record.eventonly->id_code & 0x1f) +1, "%s",
- (const char *)record.eventonly->id_string);
- break;
+ id_code = record.eventonly->id_code;
+ id_string = record.eventonly->id_string;
+ break;
+
case SDR_RECORD_TYPE_MC_DEVICE_LOCATOR:
record.mcloc = (struct sdr_record_mc_locator *) raw ;
- snprintf(desc, (record.mcloc->id_code & 0x1f) +1, "%s",
- (const char *)record.mcloc->id_string);
+ id_code = record.mcloc->id_code;
+ id_string = record.mcloc->id_string;
break;
+
default:
rc = -1;
- break;
- }
+ }
+ if (!rc) {
+ snprintf(desc, sizeof(desc), "%.*s", (id_code & 0x1f) + 1, id_string);
+ }
- lprintf(LOG_INFO, "ID: 0x%04x , NAME: %-16s", id, desc);
+ lprintf(LOG_INFO, "ID: 0x%04x , NAME: %-16s", id, desc);
return rc;
}
diff --git a/lib/ipmi_session.c b/lib/ipmi_session.c
index 141f0f4..b9af1fd 100644
--- a/lib/ipmi_session.c
+++ b/lib/ipmi_session.c
@@ -309,8 +309,10 @@ ipmi_get_session_info(struct ipmi_intf * intf,
}
else
{
- memcpy(&session_info, rsp->data, rsp->data_len);
- print_session_info(&session_info, rsp->data_len);
+ memcpy(&session_info, rsp->data,
+ __min(rsp->data_len, sizeof(session_info)));
+ print_session_info(&session_info,
+ __min(rsp->data_len, sizeof(session_info)));
}
break;
@@ -341,8 +343,10 @@ ipmi_get_session_info(struct ipmi_intf * intf,
break;
}
- memcpy(&session_info, rsp->data, rsp->data_len);
- print_session_info(&session_info, rsp->data_len);
+ memcpy(&session_info, rsp->data,
+ __min(rsp->data_len, sizeof(session_info)));
+ print_session_info(&session_info,
+ __min(rsp->data_len, sizeof(session_info)));
} while (i <= session_info.session_slot_count);
break;
--
2.20.1