From: IKEDA Soji Date: Sun, 28 Aug 2022 08:02:41 +0000 (+0900) Subject: [Fix] milter_headers: Header fields may be inserted at wrong position. X-Git-Tag: 3.3~45^2 X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=refs%2Fpull%2F4259%2Fhead;p=rspamd.git [Fix] milter_headers: Header fields may be inserted at wrong position. --- diff --git a/lualib/lua_mime.lua b/lualib/lua_mime.lua index 50c6ccd43..1087b7fd5 100644 --- a/lualib/lua_mime.lua +++ b/lualib/lua_mime.lua @@ -19,6 +19,7 @@ limitations under the License. -- This module contains helper functions to modify mime parts --]] +local logger = require "rspamd_logger" local rspamd_util = require "rspamd_util" local rspamd_text = require "rspamd_text" local ucl = require "ucl" @@ -519,21 +520,35 @@ exports.modify_headers = function(task, hdr_alterations) local add = hdr_alterations.add or {} local remove = hdr_alterations.remove or {} + local add_headers = {} -- For Milter reply local hdr_flattened = {} -- For C API local function flatten_add_header(hname, hdr) + if not add_headers[hname] then + add_headers[hname] = {} + end if not hdr_flattened[hname] then hdr_flattened[hname] = {add = {}} end local add_tbl = hdr_flattened[hname].add if hdr.value then + table.insert(add_headers[hname], { + order = (tonumber(hdr.order) or -1), + value = hdr.value, + }) table.insert(add_tbl, {tonumber(hdr.order) or -1, hdr.value}) elseif type(hdr) == 'table' then for _,v in ipairs(hdr) do - table.insert(add_tbl, {-1, v}) + flatten_add_header(hname, v) end elseif type(hdr) == 'string' then + table.insert(add_headers[hname], { + order = -1, + value = hdr, + }) table.insert(add_tbl, {-1, hdr}) + else + logger.errx(task, 'invalid modification of header: %s', hdr) end end if hdr_alterations.order then @@ -566,7 +581,7 @@ exports.modify_headers = function(task, hdr_alterations) end task:set_milter_reply({ - add_headers = hdr_alterations.add, + add_headers = add_headers, remove_headers = hdr_alterations.remove }) diff --git a/src/libserver/milter.c b/src/libserver/milter.c index f8ed7be32..8c78a6c7a 100644 --- a/src/libserver/milter.c +++ b/src/libserver/milter.c @@ -1652,17 +1652,21 @@ rspamd_milter_remove_header_safe (struct rspamd_milter_session *session, hname = g_string_new (key); hvalue = g_string_new (""); - if (nhdr >= 1) { - rspamd_milter_send_action (session, - RSPAMD_MILTER_CHGHEADER, - nhdr, hname, hvalue); + if (nhdr > 0) { + if (ar->len >= nhdr) { + rspamd_milter_send_action (session, + RSPAMD_MILTER_CHGHEADER, + nhdr, hname, hvalue); + priv->cur_hdr --; + } } - else if (nhdr == 0 && ar->len > 0) { + else if (nhdr == 0) { /* We need to clear all headers */ for (i = ar->len; i > 0; i --) { rspamd_milter_send_action (session, RSPAMD_MILTER_CHGHEADER, i, hname, hvalue); + priv->cur_hdr --; } } else { @@ -1671,11 +1675,17 @@ rspamd_milter_remove_header_safe (struct rspamd_milter_session *session, rspamd_milter_send_action (session, RSPAMD_MILTER_CHGHEADER, ar->len + nhdr + 1, hname, hvalue); + priv->cur_hdr --; } } g_string_free (hname, TRUE); g_string_free (hvalue, TRUE); + + if (priv->cur_hdr < 0) { + msg_err_milter("negative header count after removing %s", key); + priv->cur_hdr = 0; + } } } @@ -1715,10 +1725,19 @@ rspamd_milter_extract_single_header (struct rspamd_milter_session *session, else { /* Calculate negative offset */ - if (-idx <= priv->cur_hdr) { + if (idx == -1) { + rspamd_milter_send_action (session, + RSPAMD_MILTER_ADDHEADER, + hname, hvalue); + } + else if (-idx <= priv->cur_hdr) { + /* + * Note: We should account MTA's own "Received:" field + * which wasn't passed by Milter's header command. + */ rspamd_milter_send_action (session, RSPAMD_MILTER_INSHEADER, - priv->cur_hdr + idx + 1, + priv->cur_hdr + idx + 2, hname, hvalue); } else { @@ -1735,6 +1754,8 @@ rspamd_milter_extract_single_header (struct rspamd_milter_session *session, hname, hvalue); } + priv->cur_hdr ++; + g_string_free (hname, TRUE); g_string_free (hvalue, TRUE); } diff --git a/src/plugins/lua/milter_headers.lua b/src/plugins/lua/milter_headers.lua index 750b9c453..d83115fc5 100644 --- a/src/plugins/lua/milter_headers.lua +++ b/src/plugins/lua/milter_headers.lua @@ -195,48 +195,13 @@ local function milter_headers(task) local function add_header(name, value, stop_chars, order) local hname = settings.routines[name].header - if order then - if not add[hname] then - add[hname] = { - order = order, - value = lua_util.fold_header(task, hname, value, stop_chars) - } - else - if not add[hname][1] then - -- Convert to a table - add[hname] = { - [1] = add[hname] - } - end - - table.insert(add[hname], { - order = order, - value = lua_util.fold_header(task, hname, value, stop_chars) - }) - end - else - if not add[hname] then - add[hname] = lua_util.fold_header(task, hname, value, stop_chars) - else - if not add[hname][1] then - -- Convert to a table - add[hname] = { - [1] = add[hname] - } - end - - if settings.default_headers_order then - table.insert(add[hname], { - order = settings.default_headers_order, - value = lua_util.fold_header(task, hname, value, stop_chars) - }) - else - table.insert(add[hname], - lua_util.fold_header(task, hname, value, stop_chars)) - end - - end + if not add[hname] then + add[hname] = {} end + table.insert(add[hname], { + order = (order or settings.default_headers_order or -1), + value = lua_util.fold_header(task, hname, value, stop_chars) + }) end routines['x-spamd-result'] = function()