Description: Fix CVE-2020-5208
Origin: backport from
 https://github.com/ipmitool/ipmitool/commit/e824c23316ae50beb7f7488f2055ac65e8b341f2
 https://github.com/ipmitool/ipmitool/commit/840fb1cbb4fb365cb9797300e3374d4faefcdb10
 https://github.com/ipmitool/ipmitool/commit/41d7026946fafbd4d1ec0bcaca3ea30a6e8eed22
 https://github.com/ipmitool/ipmitool/commit/9452be87181a6e83cfcc768b3ed8321763db50e4
 https://github.com/ipmitool/ipmitool/commit/d45572d71e70840e0d4c50bf48218492b79c1a10
 https://github.com/ipmitool/ipmitool/commit/7ccea283dd62a05a320c1921e3d8d71a87772637
Bug: https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=950761
Forwarded: not-needed
Last-Update: 2021-01-03
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
Index: trunk/lib/ipmi_fru.c
===================================================================
--- trunk.orig/lib/ipmi_fru.c
+++ trunk/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, s
 
 	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, s
 		}
 	}
 
+	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, s
 		}
 
 		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 *
 			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 *
 
 	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 *
 	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 *
 		}
 
 		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,
 		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);
 
Index: trunk/lib/ipmi_sdr.c
===================================================================
--- trunk.orig/lib/ipmi_sdr.c
+++ trunk/lib/ipmi_sdr.c
@@ -2084,7 +2084,7 @@ ipmi_sdr_print_sensor_eventonly(struct i
 		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",
@@ -2135,7 +2135,7 @@ ipmi_sdr_print_sensor_mc_locator(struct
 		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)
@@ -2228,7 +2228,7 @@ ipmi_sdr_print_sensor_generic_locator(st
 	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)
@@ -2285,7 +2285,7 @@ ipmi_sdr_print_sensor_fru_locator(struct
 	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)
@@ -2489,35 +2489,43 @@ ipmi_sdr_print_name_from_rawentry(struct
 
    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;
 }
 
Index: trunk/lib/ipmi_channel.c
===================================================================
--- trunk.orig/lib/ipmi_channel.c
+++ trunk/lib/ipmi_channel.c
@@ -378,7 +378,10 @@ ipmi_get_channel_cipher_suites(struct ip
 		lprintf(LOG_ERR, "Unable to Get Channel Cipher Suites");
 		return -1;
 	}
-	if (rsp->ccode > 0) {
+	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;
Index: trunk/lib/ipmi_session.c
===================================================================
--- trunk.orig/lib/ipmi_session.c
+++ trunk/lib/ipmi_session.c
@@ -309,8 +309,10 @@ ipmi_get_session_info(struct ipmi_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;
 		
@@ -341,9 +343,10 @@ ipmi_get_session_info(struct ipmi_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;
 	}
Index: trunk/lib/dimm_spd.c
===================================================================
--- trunk.orig/lib/dimm_spd.c
+++ trunk/lib/dimm_spd.c
@@ -1621,7 +1621,7 @@ ipmi_spd_print_fru(struct ipmi_intf * in
 	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 * in
 		}
 
 		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);