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zabbix: fix CVE-2023-32726 and CVE-2023-32727

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CVE-2023-32726:
The vulnerability is caused by improper check for check
if RDLENGTH does not overflow the buffer in response
from DNS server.

CVE-2023-32727:
An attacker who has the privilege to configure Zabbix
items can use function icmpping() with additional
malicious command inside it to execute arbitrary code
on the current Zabbix server.

Refernces:
https://nvd.nist.gov/vuln/detail/CVE-2023-32726
https://security-tracker.debian.org/tracker/CVE-2023-32726
https://nvd.nist.gov/vuln/detail/CVE-2023-32727
https://security-tracker.debian.org/tracker/CVE-2023-32727

Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
This commit is contained in:
Yogita Urade
2024-01-15 11:24:16 +00:00
committed by Armin Kuster
parent 4af7df7929
commit de760c31d1
4 changed files with 405 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta-oe/recipes-connectivity/zabbix/zabbix/CVE-2023-32726.patch
+160
View File
@@ -0,0 +1,160 @@
From 53ef2b7119f57f4140e6bd9c5cd2d3c6af228179 Mon Sep 17 00:00:00 2001
From: Armands Arseniuss Skolmeisters <armands.skolmeisters@zabbix.com>
Date: Thu, 11 Jan 2024 12:00:24 +0000
Subject: [PATCH] ...G...... [DEV-2702] fixed buffer overread in DNS response
* commit '893902999ab7f0b15cce91e8555cb251b32b6df4':
...G...... [DEV-2702] fixed DNS record data length check
...G...... [DEV-2702] improved DNS error messages
...G...... [DEV-2702] fixed DNS error messages
...G...... [DEV-2702] improved DNS error messages
...G...... [DEV-2702] fixed buffer overread in DNS response
CVE: CVE-2023-32726
Upstream-Status: Backport [https://github.com/zabbix/zabbix/commit/53ef2b7119f57f4140e6bd9c5cd2d3c6af228179]
Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
---
src/libs/zbxsysinfo/common/dns.c | 65 +++++++++++++++++++++++++++-----
1 file changed, 56 insertions(+), 9 deletions(-)
diff --git a/src/libs/zbxsysinfo/common/dns.c b/src/libs/zbxsysinfo/common/dns.c
index e8938d8..bf456f2 100644
--- a/src/libs/zbxsysinfo/common/dns.c
+++ b/src/libs/zbxsysinfo/common/dns.c
@@ -638,7 +638,8 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
{
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr)))
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL,
+ "Cannot decode DNS response: cannot expand domain name."));
ret = SYSINFO_RET_FAIL;
goto clean;
}
@@ -651,6 +652,13 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
GETSHORT(q_len, msg_ptr);
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %-8s", decode_type(q_type));
+ if (msg_ptr + q_len > msg_end)
+ {
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response: record overflow."));
+ ret = SYSINFO_RET_FAIL;
+ goto clean;
+ }
+
switch (q_type)
{
case T_A:
@@ -695,8 +703,40 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
case T_PTR:
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr)))
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+#define ERR_MSG_PREFIX "Cannot decode DNS response: cannot expand "
+ const char *err_msg = NULL;
+
+ switch (q_type)
+ {
+ case T_NS:
+ err_msg = ERR_MSG_PREFIX "name server name.";
+ break;
+ case T_CNAME:
+ err_msg = ERR_MSG_PREFIX "canonical name.";
+ break;
+ case T_MB:
+ err_msg = ERR_MSG_PREFIX "mailbox name.";
+ break;
+ case T_MD:
+ err_msg = ERR_MSG_PREFIX "mail destination name.";
+ break;
+ case T_MF:
+ err_msg = ERR_MSG_PREFIX "mail forwarder name.";
+ break;
+ case T_MG:
+ err_msg = ERR_MSG_PREFIX "mail group name.";
+ break;
+ case T_MR:
+ err_msg = ERR_MSG_PREFIX "renamed mailbox name.";
+ break;
+ case T_PTR:
+ err_msg = ERR_MSG_PREFIX "PTR name.";
+ break;
+ }
+
+ SET_MSG_RESULT(result, zbx_strdup(NULL, err_msg));
return SYSINFO_RET_FAIL;
+#undef ERR_MSG_PREFIX
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
break;
@@ -706,7 +746,8 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr))) /* exchange */
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " cannot expand mail exchange name."));
return SYSINFO_RET_FAIL;
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
@@ -715,14 +756,16 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
case T_SOA:
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr))) /* source host */
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " cannot expand source nameserver name."));
return SYSINFO_RET_FAIL;
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr))) /* administrator */
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " cannot expand administrator mailbox name."));
return SYSINFO_RET_FAIL;
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
@@ -750,7 +793,8 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
case T_WKS:
if (INT32SZ + 1 > q_len)
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " malformed WKS resource record."));
return SYSINFO_RET_FAIL;
}
@@ -816,14 +860,16 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
case T_MINFO:
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr))) /* mailbox responsible for mailing lists */
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " cannot expand mailbox responsible for mailing lists."));
return SYSINFO_RET_FAIL;
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr))) /* mailbox for error messages */
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " cannot expand mailbox for error messages."));
return SYSINFO_RET_FAIL;
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
@@ -854,7 +900,8 @@ static int dns_query(AGENT_REQUEST *request, AGENT_RESULT *result, int short_ans
if (NULL == (name = get_name(answer.buffer, msg_end, &msg_ptr))) /* target */
{
- SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response."));
+ SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot decode DNS response:"
+ " cannot expand service target hostname."));
return SYSINFO_RET_FAIL;
}
offset += zbx_snprintf(buffer + offset, sizeof(buffer) - offset, " %s", name);
--
2.40.0
meta-oe/recipes-connectivity/zabbix/zabbix/CVE-2023-32727_0001.patch
+193
View File
@@ -0,0 +1,193 @@
From 93e090592fc6de7ec5d3d42c1bb9074ad1f3ba34 Mon Sep 17 00:00:00 2001
From: Andris Zeila <andris.zeila@zabbix.com>
Date: Fri, 12 Jan 2024 05:48:31 +0000
Subject: [PATCH] .......PS. [DEV-2695] changed fping tests to read address
from file
Merge in ZBX/zabbix from feature/DEV-2695-6.0 to release/6.0
* commit '6603893ff94620e28fc543d5d0d4c86b9be3342e':
.......PS. [DEV-2695] fixed signal blocking
.......PS. [DEV-2695] added target hostname/ip validation in fping feature tests
.......PS. [DEV-2695] added error messages when failed to prepare temporary file for fping tests
.......PS. [DEV-2695] changed fping tests to read address from file
CVE: CVE-2023-32727
Upstream-Status: BAckport [https://github.com/zabbix/zabbix/commit/93e090592fc6de7ec5d3d42c1bb9074ad1f3ba34]
Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
---
src/libs/zbxicmpping/icmpping.c | 125 ++++++++++++++++++++++++++++----
1 file changed, 112 insertions(+), 13 deletions(-)
diff --git a/src/libs/zbxicmpping/icmpping.c b/src/libs/zbxicmpping/icmpping.c
index 72f7e86..9a751b7 100644
--- a/src/libs/zbxicmpping/icmpping.c
+++ b/src/libs/zbxicmpping/icmpping.c
@@ -59,6 +59,8 @@ static void get_source_ip_option(const char *fping, const char **option, unsigne
zbx_snprintf(tmp, sizeof(tmp), "%s -h 2>&1", fping);
+ zabbix_log(LOG_LEVEL_DEBUG, "executing %s", tmp);
+
if (NULL == (f = popen(tmp, "r")))
return;
@@ -85,6 +87,110 @@ static void get_source_ip_option(const char *fping, const char **option, unsigne
*checked = 1;
}
+/******************************************************************************
+ * *
+ * Purpose: execute external program and return stdout and stderr values *
+ * *
+ * Parameters: fping - [IN] location of fping program *
+ * out - [OUT] stdout and stderr values *
+ * error - [OUT] error string if function fails *
+ * max_error_len - [IN] length of error buffer *
+ * *
+ * Return value: SUCCEED if processed successfully or FAIL otherwise *
+ * *
+ ******************************************************************************/
+static int get_fping_out(const char *fping, const char *address, char **out, char *error, size_t max_error_len)
+{
+ FILE *f;
+ size_t buf_size = 0, offset = 0, len;
+ ssize_t n;
+ char tmp[MAX_STRING_LEN], *buffer = NULL;
+ int ret = FAIL, fd;
+ sigset_t mask, orig_mask;
+ char filename[MAX_STRING_LEN];
+
+ if (FAIL == zbx_validate_hostname(address) && FAIL == is_supported_ip(address))
+ {
+ zbx_strlcpy(error, "Invalid host name or IP address", max_error_len);
+ return FAIL;
+ }
+
+ zbx_snprintf(filename, sizeof(filename), "%s/%s_XXXXXX", CONFIG_TMPDIR, progname);
+ if (-1 == (fd = mkstemp(filename)))
+ {
+ zbx_snprintf(error, max_error_len, "Cannot create temporary file \"%s\": %s", filename,
+ zbx_strerror(errno));
+
+ return FAIL;
+ }
+
+ sigemptyset(&mask);
+ sigaddset(&mask, SIGINT);
+ sigaddset(&mask, SIGQUIT);
+
+ len = strlen(address);
+ if (-1 == (n = write(fd, address, len)))
+ {
+ zbx_snprintf(error, max_error_len, "Cannot write address into temporary file: %s", zbx_strerror(errno));
+ (void)close(fd);
+ goto out;
+ }
+
+ if (n != (ssize_t)len)
+ {
+ zbx_strlcpy(error, "Cannot write full address into temporary file", max_error_len);
+ (void)close(fd);
+ goto out;
+ }
+
+ if (-1 == close(fd))
+ {
+ zbx_snprintf(error, max_error_len, "Cannot close temporary file: %s", zbx_strerror(errno));
+ goto out;
+ }
+
+ zbx_snprintf(tmp, sizeof(tmp), "%s 2>&1 < %s", fping, filename);
+
+ if (0 > sigprocmask(SIG_BLOCK, &mask, &orig_mask))
+ zbx_error("cannot set sigprocmask to block the user signal");
+
+ zabbix_log(LOG_LEVEL_DEBUG, "executing %s", tmp);
+
+ if (NULL == (f = popen(tmp, "r")))
+ {
+ zbx_strlcpy(error, zbx_strerror(errno), max_error_len);
+ goto out;
+ }
+
+ while (NULL != zbx_fgets(tmp, sizeof(tmp), f))
+ {
+ len = strlen(tmp);
+
+ if (MAX_EXECUTE_OUTPUT_LEN < offset + len)
+ break;
+
+ zbx_strncpy_alloc(&buffer, &buf_size, &offset, tmp, len);
+ }
+
+ pclose(f);
+
+ if (NULL == buffer)
+ {
+ zbx_strlcpy(error, "Cannot obtain the program output", max_error_len);
+ goto out;
+ }
+
+ *out = buffer;
+ ret = SUCCEED;
+out:
+ unlink(filename);
+
+ if (0 > sigprocmask(SIG_SETMASK, &orig_mask, NULL))
+ zbx_error("cannot restore sigprocmask");
+
+ return ret;
+}
+
/******************************************************************************
* *
* Function: get_interval_option *
@@ -137,19 +243,12 @@ static int get_interval_option(const char *fping, ZBX_FPING_HOST *hosts, int hos
zabbix_log(LOG_LEVEL_DEBUG, "testing fping interval %u ms", intervals[j]);
- zbx_snprintf(tmp, sizeof(tmp), "%s -c1 -t50 -i%u %s", fping, intervals[j], dst);
+ zbx_snprintf(tmp, sizeof(tmp), "%s -c1 -t50 -i%u", fping, intervals[j]);
zbx_free(out);
/* call fping, ignore its exit code but mind execution failures */
- if (TIMEOUT_ERROR == (ret_exec = zbx_execute(tmp, &out, err, sizeof(err), 1,
- ZBX_EXIT_CODE_CHECKS_DISABLED, NULL)))
- {
- zbx_snprintf(error, max_error_len, "Timeout while executing \"%s\"", tmp);
- goto out;
- }
-
- if (FAIL == ret_exec)
+ if (SUCCEED != (ret_exec = get_fping_out(tmp, dst, &out, err, sizeof(err))))
{
zbx_snprintf(error, max_error_len, "Cannot execute \"%s\": %s", tmp, err);
goto out;
@@ -251,10 +350,10 @@ static int get_ipv6_support(const char * fping, const char *dst)
int ret;
char tmp[MAX_STRING_LEN], error[255], *out = NULL;
- zbx_snprintf(tmp, sizeof(tmp), "%s -6 -c1 -t50 %s", fping, dst);
+ zbx_snprintf(tmp, sizeof(tmp), "%s -6 -c1 -t50", fping);
- if ((SUCCEED == (ret = zbx_execute(tmp, &out, error, sizeof(error), 1, ZBX_EXIT_CODE_CHECKS_DISABLED, NULL)) &&
- ZBX_KIBIBYTE > strlen(out) && NULL != strstr(out, dst)) || TIMEOUT_ERROR == ret)
+ if (SUCCEED == (ret = get_fping_out(tmp, dst, &out, error, sizeof(error)) &&
+ ZBX_KIBIBYTE > strlen(out) && NULL != strstr(out, dst)))
{
ret = SUCCEED;
}
@@ -538,7 +637,7 @@ static int process_ping(ZBX_FPING_HOST *hosts, int hosts_count, int count, int i
fclose(f);
- zabbix_log(LOG_LEVEL_DEBUG, "%s", tmp);
+ zabbix_log(LOG_LEVEL_DEBUG, "executing %s", tmp);
sigemptyset(&mask);
sigaddset(&mask, SIGINT);
--
2.40.0
meta-oe/recipes-connectivity/zabbix/zabbix/CVE-2023-32727_0002.patch
+49
View File
@@ -0,0 +1,49 @@
From 610f9fdbb86667f4094972547deb936c6cdfc6d5 Mon Sep 17 00:00:00 2001
From: Andris Zeila <andris.zeila@zabbix.com>
Date: Fri, 12 Jan 2024 06:06:02 +0000
Subject: [PATCH] .......PS. [DEV-2695] removed group/all access flags for
fping temporary files
Merge in ZBX/zabbix from feature/DEV-2695-6.5 to master
* commit 'cf07db1d5c2b8fe4a9de85fed22cf05035e08914':
.......PS. [DEV-2695] remove group/all access flags when creating fping input file for testing fping features
(cherry picked from commit cd12f0a2d89c3ef05f0e9f50dcb73fdaf3a7e8a9)
CVE: CVE-2023-32727
Upstream_Status: Backport [https://github.com/zabbix/zabbix/commit/610f9fdbb86667f4094972547deb936c6cdfc6d5]
Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
---
src/libs/zbxicmpping/icmpping.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/libs/zbxicmpping/icmpping.c b/src/libs/zbxicmpping/icmpping.c
index 9a751b7..bab3d09 100644
--- a/src/libs/zbxicmpping/icmpping.c
+++ b/src/libs/zbxicmpping/icmpping.c
@@ -108,6 +108,7 @@ static int get_fping_out(const char *fping, const char *address, char **out, cha
int ret = FAIL, fd;
sigset_t mask, orig_mask;
char filename[MAX_STRING_LEN];
+ mode_t mode;
if (FAIL == zbx_validate_hostname(address) && FAIL == is_supported_ip(address))
{
@@ -116,7 +117,12 @@ static int get_fping_out(const char *fping, const char *address, char **out, cha
}
zbx_snprintf(filename, sizeof(filename), "%s/%s_XXXXXX", CONFIG_TMPDIR, progname);
- if (-1 == (fd = mkstemp(filename)))
+
+ mode = umask(077);
+ fd = mkstemp(filename);
+ umask(mode);
+
+ if (-1 == fd)
{
zbx_snprintf(error, max_error_len, "Cannot create temporary file \"%s\": %s", filename,
zbx_strerror(errno));
--
2.40.0
meta-oe/recipes-connectivity/zabbix/zabbix_5.4.12.bb
+3
View File
@@ -31,6 +31,9 @@ SRC_URI = "https://cdn.zabbix.com/zabbix/sources/stable/5.4/${BPN}-${PV}.tar.gz
file://CVE-2023-29451.patch \ file://CVE-2023-29451.patch \
file://CVE-2023-29449.patch \ file://CVE-2023-29449.patch \
file://CVE-2023-29450.patch \ file://CVE-2023-29450.patch \
file://CVE-2023-32726.patch \
file://CVE-2023-32727_0001.patch \
file://CVE-2023-32727_0002.patch \
" "
SRC_URI[md5sum] = "f295fd2df86143d72f6ff26e47d9e39e" SRC_URI[md5sum] = "f295fd2df86143d72f6ff26e47d9e39e"