Fix CVE-2019-10149

[exim.git] / src / src / deliver.c

diff --git a/src/src/deliver.c b/src/src/deliver.c
index 59256ac2cb91f9abf1a40bdb8a33500b8ef8acf6..45cc0723f9203a5bf55aecb06ad6736cc173f387 100644 (file)
--- a/src/src/deliver.c
+++ b/src/src/deliver.c
@@ -6227,17 +6227,23 @@ if (process_recipients != RECIP_IGNORE)
        {
        uschar * save_local =  deliver_localpart;
        const uschar * save_domain = deliver_domain;
+       uschar * addr = new->address, * errmsg = NULL;
+       int start, end, dom;
 
-       deliver_localpart = expand_string(
-                     string_sprintf("${local_part:%s}", new->address));
-       deliver_domain =    expand_string(
-                     string_sprintf("${domain:%s}", new->address));
+       if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE))
+         log_write(0, LOG_MAIN|LOG_PANIC,
+                "failed to parse address '%.100s': %s\n", addr, errmsg);
+       else
+         {
+         deliver_localpart =
+           string_copyn(addr+start, dom ? (dom-1) - start : end - start);
+         deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS"";
 
-       (void) event_raise(event_action,
-                     US"msg:fail:internal", new->message);
+         event_raise(event_action, US"msg:fail:internal", new->message);
 
-       deliver_localpart = save_local;
-       deliver_domain =    save_domain;
+         deliver_localpart = save_local;
+         deliver_domain = save_domain;
+         }
        }
 #endif
       }