Merge pull request openwrt#12419 from lynxis/ipmitool

ipmitool: fix CVE-2020-5208

admin/ipmitool/Makefile

@@ -9,13 +9,14 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ipmitool
 PKG_VERSION:=1.8.18
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=@SF/$(PKG_NAME)
 PKG_HASH:=0c1ba3b1555edefb7c32ae8cd6a3e04322056bc087918f07189eeedfc8b81e01
 PKG_LICENSE:=BSD-3-clause
 PKG_LICENSE_FILES:=COPYING
+PKG_CPE_ID:=cpe:/a:ipmitool_project:ipmitool
 
 include $(INCLUDE_DIR)/package.mk
 

admin/ipmitool/patches/0006-CVE-2020-5208-fru-Fix-buffer-overflow-vulnerabilities.patch

@@ -0,0 +1,128 @@
+From 960dbb956d9f9cb05b719087faed53c88dc80956 Mon Sep 17 00:00:00 2001
+From: Chrostoper Ertl <[email protected]>
+Date: Thu, 28 Nov 2019 16:33:59 +0000
+Subject: [PATCH 06/11] fru: Fix buffer overflow vulnerabilities
+
+Partial fix for CVE-2020-5208, see
+https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
+
+The `read_fru_area_section` function only performs size validation of
+requested read size, and falsely assumes that the IPMI message will not
+respond with more than the requested amount of data; it uses the
+unvalidated response size to copy into `frubuf`. If the response is
+larger than the request, this can result in overflowing the buffer.
+
+The same issue affects the `read_fru_area` function.
+---
+ lib/ipmi_fru.c | 33 +++++++++++++++++++++++++++++++--
+ 1 file changed, 31 insertions(+), 2 deletions(-)
+
+diff --git a/lib/ipmi_fru.c b/lib/ipmi_fru.c
+index cf00effc82a2..af99aa99444c 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
+-- 
+2.27.0
+

admin/ipmitool/patches/0007-CVE-2020-5208-fru-Fix-buffer-overflow-in-ipmi_spd_print_fru.patch

@@ -0,0 +1,48 @@
+From 910e5782b7d9f222d4e34d3505d0d636ff757103 Mon Sep 17 00:00:00 2001
+From: Chrostoper Ertl <[email protected]>
+Date: Thu, 28 Nov 2019 16:44:18 +0000
+Subject: [PATCH 07/11] fru: Fix buffer overflow in ipmi_spd_print_fru
+
+Partial fix for CVE-2020-5208, see
+https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
+
+The `ipmi_spd_print_fru` function has a similar issue as the one fixed
+by the previous commit in `read_fru_area_section`. An initial request is
+made to get the `fru.size`, which is used as the size for the allocation
+of `spd_data`. Inside a loop, further requests are performed to get the
+copy sizes which are not checked before being used as the size for a
+copy into the buffer.
+---
+ lib/dimm_spd.c | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/lib/dimm_spd.c b/lib/dimm_spd.c
+index 41e30dbb4bda..68f3b4fa1eff 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);
+-- 
+2.27.0
+

admin/ipmitool/patches/0008-CVE-2020-5208-session-Fix-buffer-overflow-in-ipmi_get_session_info.patch

@@ -0,0 +1,48 @@
+From 4f7778ed232a92bde388f38917b94f458a82c78e Mon Sep 17 00:00:00 2001
+From: Chrostoper Ertl <[email protected]>
+Date: Thu, 28 Nov 2019 16:51:49 +0000
+Subject: [PATCH 08/11] session: Fix buffer overflow in ipmi_get_session_info
+
+Partial fix for CVE-2020-5208, see
+https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
+
+The `ipmi_get_session_info` function does not properly check the
+response `data_len`, which is used as a copy size, allowing stack buffer
+overflow.
+---
+ lib/ipmi_session.c | 12 ++++++++----
+ 1 file changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/lib/ipmi_session.c b/lib/ipmi_session.c
+index 141f0f4ec8dd..b9af1fd75d40 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;
+-- 
+2.27.0
+

admin/ipmitool/patches/0009-CVE-2020-5208-channel-Fix-buffer-overflow.patch

@@ -0,0 +1,37 @@
+From 743dd4faa302f22950e4438cf684e1e398eb47eb Mon Sep 17 00:00:00 2001
+From: Chrostoper Ertl <[email protected]>
+Date: Thu, 28 Nov 2019 16:56:38 +0000
+Subject: [PATCH 09/11] channel: Fix buffer overflow
+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 `ipmi_get_channel_cipher_suites` function does not properly check
+the final response’s `data_len`, which can lead to stack buffer overflow
+on the final copy.
+---
+ lib/ipmi_channel.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/lib/ipmi_channel.c b/lib/ipmi_channel.c
+index fab2e5483d12..8cd7c59a4273 100644
+--- a/lib/ipmi_channel.c
++++ b/lib/ipmi_channel.c
+@@ -413,7 +413,10 @@ 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 > 0) {
++		if (rsp->ccode
++		    || rsp->data_len < 1
++		    || rsp->data_len > sizeof(uint8_t) + 0x10)
++		{
+ 			lprintf(LOG_ERR, "Get Channel Cipher Suites failed: %s",
+ 					val2str(rsp->ccode, completion_code_vals));
+ 			return -1;
+-- 
+2.27.0
+

admin/ipmitool/patches/0010-CVE-2020-5208-lanp-Fix-buffer-overflows-in-get_lan_param_select.patch

@@ -0,0 +1,88 @@
+From e048e9c65a52f0879d482531e70735c1d314d43a Mon Sep 17 00:00:00 2001
+From: Chrostoper Ertl <[email protected]>
+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
+