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|
Description: patch for CVE-2014-3565
taken from http://sourceforge.net/p/net-snmp/official-patches/48/
Origin: upstream
Bug-Debian: http://bugs.debian.org/760132
Last-Update: 2012-07-17
commit 7f4a7b891332899cea26e95be0337aae01648742
Author: Jan Safranek <jsafranek@users.sourceforge.net>
Date: Thu Jul 31 13:46:49 2014 +0200
Added checks for printing variables with wrong types.
When -OQ command line argument is used, variable formatter preffers the type
of the varible parsed from a MIB file instead of checking type of the variable
as parsed from SNMP message.
This can lead to crashes when incoming packets contains a variable with
NULL type, while the MIB says the variable should be non-NULL, like Integer.
The formatter then tries to interpret the NULL (from packet) as Integer (from
MIB file).
Index: pkg-net-snmp/snmplib/mib.c
===================================================================
--- pkg-net-snmp.orig/snmplib/mib.c 2014-05-15 23:29:58.461566805 +0900
+++ pkg-net-snmp/snmplib/mib.c 2014-09-15 22:50:53.677839395 +0900
@@ -464,17 +464,16 @@
u_char *cp;
int output_format, cnt;
- if ((var->type != ASN_OCTET_STR) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- const char str[] = "Wrong Type (should be OCTET STRING): ";
- if (snmp_cstrcat
- (buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_OCTET_STR) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ const char str[] = "Wrong Type (should be OCTET STRING): ";
+ if (!snmp_cstrcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
@@ -742,16 +741,16 @@
const struct enum_list *enums,
const char *hint, const char *units)
{
- if ((var->type != ASN_OPAQUE_FLOAT) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- if (snmp_cstrcat(buf, buf_len, out_len, allow_realloc,
- "Wrong Type (should be Float): ")) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_OPAQUE_FLOAT) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Float): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -812,17 +811,16 @@
const struct enum_list *enums,
const char *hint, const char *units)
{
- if ((var->type != ASN_OPAQUE_DOUBLE) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- if (snmp_cstrcat
- (buf, buf_len, out_len, allow_realloc,
- "Wrong Type (should be Double): ")) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_OPAQUE_DOUBLE) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Double): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -887,20 +885,21 @@
{
char a64buf[I64CHARSZ + 1];
- if ((var->type != ASN_COUNTER64
+ if (var->type != ASN_COUNTER64
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
&& var->type != ASN_OPAQUE_COUNTER64
&& var->type != ASN_OPAQUE_I64 && var->type != ASN_OPAQUE_U64
#endif
- ) && (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- if (snmp_cstrcat(buf, buf_len, out_len, allow_realloc,
- "Wrong Type (should be Counter64): ")) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ ) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Counter64): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -988,23 +987,25 @@
const struct enum_list *enums,
const char *hint, const char *units)
{
- if ((var->type != ASN_OPAQUE
+ if (var->type != ASN_OPAQUE
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
&& var->type != ASN_OPAQUE_COUNTER64
&& var->type != ASN_OPAQUE_U64
&& var->type != ASN_OPAQUE_I64
&& var->type != ASN_OPAQUE_FLOAT && var->type != ASN_OPAQUE_DOUBLE
#endif /* NETSNMP_WITH_OPAQUE_SPECIAL_TYPES */
- ) && (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- if (snmp_cstrcat(buf, buf_len, out_len, allow_realloc,
- "Wrong Type (should be Opaque): ")) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ ) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Opaque): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
+
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
switch (var->type) {
case ASN_OPAQUE_COUNTER64:
@@ -1080,17 +1081,16 @@
{
int buf_overflow = 0;
- if ((var->type != ASN_OBJECT_ID) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] =
- "Wrong Type (should be OBJECT IDENTIFIER): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_OBJECT_ID) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be OBJECT IDENTIFIER): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -1150,16 +1150,16 @@
{
char timebuf[40];
- if ((var->type != ASN_TIMETICKS) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be Timeticks): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_TIMETICKS) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Timeticks): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_NUMERIC_TIMETICKS)) {
@@ -1298,17 +1298,18 @@
{
char *enum_string = NULL;
- if ((var->type != ASN_INTEGER) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be INTEGER): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_INTEGER) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be INTEGER): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
+
for (; enums; enums = enums->next) {
if (enums->value == *var->val.integer) {
enum_string = enums->label;
@@ -1401,16 +1402,16 @@
{
char *enum_string = NULL;
- if ((var->type != ASN_UINTEGER) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be UInteger32): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_UINTEGER) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be UInteger32): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
for (; enums; enums = enums->next) {
@@ -1498,17 +1499,16 @@
{
char tmp[32];
- if ((var->type != ASN_GAUGE) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] =
- "Wrong Type (should be Gauge32 or Unsigned32): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_GAUGE) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Gauge32 or Unsigned32): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -1571,16 +1571,16 @@
{
char tmp[32];
- if ((var->type != ASN_COUNTER) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be Counter32): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_COUNTER) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be Counter32): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -1634,16 +1634,16 @@
{
size_t i;
- if ((var->type != ASN_IPADDRESS) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be NetworkAddress): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_IPADDRESS) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be NetworkAddress): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -1700,16 +1700,16 @@
{
u_char *ip = var->val.string;
- if ((var->type != ASN_IPADDRESS) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be IpAddress): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_IPADDRESS) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be IpAddress): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -1758,20 +1758,20 @@
const struct enum_list *enums,
const char *hint, const char *units)
{
- if ((var->type != ASN_NULL) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be NULL): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_NULL) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be NULL): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
- } else {
- u_char str[] = "NULL";
- return snmp_strcat(buf, buf_len, out_len, allow_realloc, str);
}
+
+ u_char str[] = "NULL";
+ return snmp_strcat(buf, buf_len, out_len, allow_realloc, str);
}
@@ -1806,16 +1806,16 @@
u_char *cp;
char *enum_string;
- if ((var->type != ASN_BIT_STR && var->type != ASN_OCTET_STR) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be BITS): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_BIT_STR && var->type != ASN_OCTET_STR) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be BITS): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
@@ -1890,16 +1890,16 @@
const struct enum_list *enums, const char *hint,
const char *units)
{
- if ((var->type != ASN_NSAP) &&
- (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
- u_char str[] = "Wrong Type (should be NsapAddress): ";
- if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
- return sprint_realloc_by_type(buf, buf_len, out_len,
+ if (var->type != ASN_NSAP) {
+ if (!netsnmp_ds_get_boolean(
+ NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT)) {
+ u_char str[] = "Wrong Type (should be NsapAddress): ";
+ if (!snmp_strcat(buf, buf_len, out_len, allow_realloc, str))
+ return 0;
+ }
+ return sprint_realloc_by_type(buf, buf_len, out_len,
allow_realloc, var, NULL, NULL,
NULL);
- } else {
- return 0;
- }
}
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
|
