ipmitool: fixes for CVE-2020-5208

This patch is the other part of the fixes for CVE-2020-5208.

Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
This commit is contained in:
Wenlin Kang
2020-03-17 09:44:32 -07:00
committed by Khem Raj
parent c64b204a3a
commit 464c317c85
6 changed files with 416 additions and 0 deletions
@@ -0,0 +1,53 @@
From 24aed93efb30a8f557aedc2f03b6ccec758ccbf4 Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 16:44:18 +0000
Subject: [PATCH 1/5] 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.
Upstream-Status: Backport[https://github.com/ipmitool/ipmitool/commit/840fb1cbb4fb365cb9797300e3374d4faefcdb10]
CVE: CVE-2020-5208
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
---
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 91ae117..4c9c21d 100644
--- a/lib/dimm_spd.c
+++ b/lib/dimm_spd.c
@@ -1014,7 +1014,7 @@ 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;
@@ -1091,6 +1091,13 @@ 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);
--
1.9.1
@@ -0,0 +1,53 @@
From 81144cfba131b4ddbfcf9c530274b23bfc7e0ea8 Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 16:51:49 +0000
Subject: [PATCH 2/5] 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.
Upstream-Status: Backport[https://github.com/ipmitool/ipmitool/commit/41d7026946fafbd4d1ec0bcaca3ea30a6e8eed22]
CVE: CVE-2020-5208
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
---
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 4855bc4..71bef4c 100644
--- a/lib/ipmi_session.c
+++ b/lib/ipmi_session.c
@@ -319,8 +319,10 @@ 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;
@@ -351,8 +353,10 @@ 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;
--
1.9.1
@@ -0,0 +1,69 @@
From 5057761e30e3a7682edab60f98f631616392ddc6 Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 16:56:38 +0000
Subject: [PATCH 3/3] 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 responses `data_len`, which can lead to stack buffer overflow
on the final copy.
Upstream-Status: Backport[https://github.com/ipmitool/ipmitool/commit/9452be87181a6e83cfcc768b3ed8321763db50e4]
CVE: CVE-2020-5208
[Make some changes to apply it]
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
---
include/ipmitool/ipmi_channel.h | 2 ++
lib/ipmi_channel.c | 10 ++++++++--
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/ipmitool/ipmi_channel.h b/include/ipmitool/ipmi_channel.h
index b138c26..d7cce5e 100644
--- a/include/ipmitool/ipmi_channel.h
+++ b/include/ipmitool/ipmi_channel.h
@@ -77,6 +77,8 @@ struct channel_access_t {
uint8_t user_level_auth;
};
+#define MAX_CIPHER_SUITE_DATA_LEN 0x10
+
/*
* The Get Authentication Capabilities response structure
* From table 22-15 of the IPMI v2.0 spec
diff --git a/lib/ipmi_channel.c b/lib/ipmi_channel.c
index fab2e54..76ecdcd 100644
--- a/lib/ipmi_channel.c
+++ b/lib/ipmi_channel.c
@@ -378,7 +378,10 @@ 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) + MAX_CIPHER_SUITE_DATA_LEN)
+ {
lprintf(LOG_ERR, "Get Channel Cipher Suites failed: %s",
val2str(rsp->ccode, completion_code_vals));
return -1;
@@ -413,7 +416,10 @@ 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) + MAX_CIPHER_SUITE_DATA_LEN)
+ {
lprintf(LOG_ERR, "Get Channel Cipher Suites failed: %s",
val2str(rsp->ccode, completion_code_vals));
return -1;
--
2.18.1
@@ -0,0 +1,94 @@
From e6aa6076f65e71544bd6450d20d943d7baaccb9f Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 17:06:39 +0000
Subject: [PATCH 4/5] 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
responses `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 060e753..dee21ee 100644
--- a/lib/ipmi_lanp.c
+++ b/lib/ipmi_lanp.c
@@ -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)));
/* set new ipaddr */
memcpy(data+3, temp, 4);
printf("Setting LAN Alert %d IP Address to %d.%d.%d.%d\n", alert,
@@ -1932,7 +1932,7 @@ 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 "
@@ -1947,7 +1947,7 @@ 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) {
@@ -1973,7 +1973,7 @@ 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) {
@@ -1998,7 +1998,7 @@ 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);
@@ -2026,7 +2026,7 @@ 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]);
@@ -2042,7 +2042,7 @@ 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]);
--
1.9.1
@@ -0,0 +1,142 @@
From 26e64ca78ae844c5ceedde89531e2924d7d4594c Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 17:13:45 +0000
Subject: [PATCH 5/5] fru, sdr: Fix id_string buffer overflows
Final part of the fixes for CVE-2020-5208, see
https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
9 variants of stack buffer overflow when parsing `id_string` field of
SDR records returned from `CMD_GET_SDR` command.
SDR record structs have an `id_code` field, and an `id_string` `char`
array.
The length of `id_string` is calculated as `(id_code & 0x1f) + 1`,
which can be larger than expected 16 characters (if `id_code = 0xff`,
then length will be `(0xff & 0x1f) + 1 = 32`).
In numerous places, this can cause stack buffer overflow when copying
into fixed buffer of size `17` bytes from this calculated length.
Upstream-Status: Backport[https://github.com/ipmitool/ipmitool/commit/7ccea283dd62a05a320c1921e3d8d71a87772637]
CVE: CVE-2020-5208
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
---
lib/ipmi_fru.c | 2 +-
lib/ipmi_sdr.c | 40 ++++++++++++++++++++++++----------------
2 files changed, 25 insertions(+), 17 deletions(-)
diff --git a/lib/ipmi_fru.c b/lib/ipmi_fru.c
index b71ea23..1decea2 100644
--- a/lib/ipmi_fru.c
+++ b/lib/ipmi_fru.c
@@ -3038,7 +3038,7 @@ 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_sdr.c b/lib/ipmi_sdr.c
index fa7b082..175a86f 100644
--- a/lib/ipmi_sdr.c
+++ b/lib/ipmi_sdr.c
@@ -2113,7 +2113,7 @@ 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",
@@ -2164,7 +2164,7 @@ 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)
@@ -2257,7 +2257,7 @@ 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)
@@ -2314,7 +2314,7 @@ 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)
@@ -2518,35 +2518,43 @@ 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;
}
--
1.9.1
@@ -25,6 +25,11 @@ DEPENDS = "openssl readline ncurses"
SRC_URI = "${SOURCEFORGE_MIRROR}/ipmitool/ipmitool-${PV}.tar.bz2 \
file://0001-Migrate-to-openssl-1.1.patch \
file://0001-fru-Fix-buffer-overflow-vulnerabilities.patch \
file://0001-fru-Fix-buffer-overflow-in-ipmi_spd_print_fru.patch \
file://0002-session-Fix-buffer-overflow-in-ipmi_get_session_info.patch \
file://0003-channel-Fix-buffer-overflow.patch \
file://0004-lanp-Fix-buffer-overflows-in-get_lan_param_select.patch \
file://0005-fru-sdr-Fix-id_string-buffer-overflows.patch \
"
SRC_URI[md5sum] = "bab7ea104c7b85529c3ef65c54427aa3"
SRC_URI[sha256sum] = "0c1ba3b1555edefb7c32ae8cd6a3e04322056bc087918f07189eeedfc8b81e01"