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| author | Kim Alvefur <zash@zash.se> | 2020-11-11 16:00:41 +0100 |
|---|---|---|
| committer | Kim Alvefur <zash@zash.se> | 2020-11-11 16:00:41 +0100 |
| commit | 8328e6681e7a999c59be05c9e08158a0cf9f95d0 (patch) | |
| tree | e750b29cd09996fd6d557a93df15a226e465e6ba | |
| parent | 63f44f3640ba88bec4b910b27a1e0801cb0c0fcf (diff) | |
| download | prosody-8328e6681e7a999c59be05c9e08158a0cf9f95d0.tar.gz prosody-8328e6681e7a999c59be05c9e08158a0cf9f95d0.zip | |
util.stanza: Reject ASCII control characters (fixes #1606)
| -rw-r--r-- | spec/util_stanza_spec.lua | 1 | ||||
| -rw-r--r-- | util/stanza.lua | 10 |
2 files changed, 10 insertions, 1 deletions
diff --git a/spec/util_stanza_spec.lua b/spec/util_stanza_spec.lua index 6fbae41a..da29f890 100644 --- a/spec/util_stanza_spec.lua +++ b/spec/util_stanza_spec.lua @@ -200,6 +200,7 @@ describe("util.stanza", function() ["number"] = 1234, ["table"] = {}; ["utf8"] = string.char(0xF4, 0x90, 0x80, 0x80); ["nil"] = "nil"; ["boolean"] = true; + ["control characters"] = "\0\1\2\3"; }; for value_type, value in pairs(invalid_names) do diff --git a/util/stanza.lua b/util/stanza.lua index a90d56b3..cf2818ec 100644 --- a/util/stanza.lua +++ b/util/stanza.lua @@ -45,6 +45,10 @@ local _ENV = nil; local stanza_mt = { __name = "stanza" }; stanza_mt.__index = stanza_mt; +local function valid_xml_cdata(str, attr) + return not s_find(str, attr and "[^\1\9\10\13\20-~\128-\247]" or "[^\9\10\13\20-~\128-\247]"); +end + local function check_name(name, name_type) if type(name) ~= "string" then error("invalid "..name_type.." name: expected string, got "..type(name)); @@ -52,6 +56,8 @@ local function check_name(name, name_type) error("invalid "..name_type.." name: empty string"); elseif s_find(name, "[<>& '\"]") then error("invalid "..name_type.." name: contains invalid characters"); + elseif not valid_xml_cdata(name, name_type == "attribute") then + error("invalid "..name_type.." name: contains control characters"); elseif not valid_utf8(name) then error("invalid "..name_type.." name: contains invalid utf8"); end @@ -60,7 +66,9 @@ end local function check_text(text, text_type) if type(text) ~= "string" then error("invalid "..text_type.." value: expected string, got "..type(text)); - elseif not valid_utf8(text) then + elseif not valid_xml_cdata(text) then + error("invalid "..text_type.." value: contains control characters"); + elseif not valid_utf8(text, false) then error("invalid "..text_type.." value: contains invalid utf8"); end end |