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diff -urNp old/agent/mibgroup/agent/extend.c new/agent/mibgroup/agent/extend.c
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--- old/agent/mibgroup/agent/extend.c 2020-11-11 12:41:46.377115142 +0100
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+++ new/agent/mibgroup/agent/extend.c 2020-11-11 12:50:28.047142105 +0100
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@@ -16,6 +16,12 @@
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#define SHELLCOMMAND 3
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#endif
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+/* This mib is potentially dangerous to turn on by default, since it
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+ * allows arbitrary commands to be set by anyone with SNMP WRITE
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+ * access to the MIB table. If all of your users are "root" level
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+ * users, then it may be safe to turn on. */
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+#define ENABLE_EXTEND_WRITE_ACCESS 0
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+
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netsnmp_feature_require(extract_table_row_data)
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netsnmp_feature_require(table_data_delete_table)
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#ifndef NETSNMP_NO_WRITE_SUPPORT
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@@ -723,7 +729,7 @@ handle_nsExtendConfigTable(netsnmp_mib_h
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*
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**********/
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-#ifndef NETSNMP_NO_WRITE_SUPPORT
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+#if !defined(NETSNMP_NO_WRITE_SUPPORT) && ENABLE_EXTEND_WRITE_ACCESS
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case MODE_SET_RESERVE1:
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/*
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* Validate the new assignments
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@@ -1049,7 +1055,7 @@ handle_nsExtendConfigTable(netsnmp_mib_h
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}
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}
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break;
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-#endif /* !NETSNMP_NO_WRITE_SUPPORT */
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+#endif /* !NETSNMP_NO_WRITE_SUPPORT and ENABLE_EXTEND_WRITE_ACCESS */
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default:
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netsnmp_set_request_error(reqinfo, request, SNMP_ERR_GENERR);
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@@ -1057,7 +1063,7 @@ handle_nsExtendConfigTable(netsnmp_mib_h
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}
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}
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-#ifndef NETSNMP_NO_WRITE_SUPPORT
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+#if !defined(NETSNMP_NO_WRITE_SUPPORT) && ENABLE_EXTEND_WRITE_ACCESS
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/*
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* If we're marking a given row as active,
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* then we need to check that it's ready.
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@@ -1082,7 +1088,7 @@ handle_nsExtendConfigTable(netsnmp_mib_h
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}
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}
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}
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-#endif /* !NETSNMP_NO_WRITE_SUPPORT */
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+#endif /* !NETSNMP_NO_WRITE_SUPPORT && ENABLE_EXTEND_WRITE_ACCESS */
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return SNMP_ERR_NOERROR;
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}
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@@ -1571,7 +1577,7 @@ fixExec2Error(int action,
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idx = name[name_len-1] -1;
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exten = &compatability_entries[ idx ];
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-#ifndef NETSNMP_NO_WRITE_SUPPORT
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+#if !defined(NETSNMP_NO_WRITE_SUPPORT) && ENABLE_EXTEND_WRITE_ACCESS
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switch (action) {
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case MODE_SET_RESERVE1:
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if (var_val_type != ASN_INTEGER) {
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@@ -1592,7 +1598,7 @@ fixExec2Error(int action,
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case MODE_SET_COMMIT:
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netsnmp_cache_check_and_reload( exten->efix_entry->cache );
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}
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-#endif /* !NETSNMP_NO_WRITE_SUPPORT */
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+#endif /* !NETSNMP_NO_WRITE_SUPPORT && ENABLE_EXTEND_WRITE_ACCESS */
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return SNMP_ERR_NOERROR;
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}
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#endif /* USING_UCD_SNMP_EXTENSIBLE_MODULE */
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