From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Thu, 11 Jun 2020 23:46:34 +0000 (+0100)
Subject: Taint: fix radius expansion condition
X-Git-Url: https://git.exim.org/users/heiko/exim.git/commitdiff_plain/94d719d803caf2c0c902dceeb787795eac11a63b?ds=sidebyside

Taint: fix radius expansion condition

(cherry picked from commit f91219c114a3d95792d052555664a5a7a3984a8d)
---

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 612005803..41d8c6276 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -9,7 +9,7 @@ Since Exim version 4.94
 JH/02 Bug 2587: Fix pam expansion condition.  Tainted values are commonly used
       as arguments, so an implementation trying to copy these into a local
       buffer was taking a taint-enforcement trap.  Fix by using dynamically
-      created buffers.
+      created buffers.  Similar fix for radius expansion condition.
 
 JH/03 Bug 2586: Fix listcount expansion operator.  Using tainted arguments is
       reasonable, eg. to count headers.  Fix by using dynamically created
diff --git a/src/src/auths/call_radius.c b/src/src/auths/call_radius.c
index cc269dcd5..9d10b34c6 100644
--- a/src/src/auths/call_radius.c
+++ b/src/src/auths/call_radius.c
@@ -96,8 +96,7 @@ int sep = 0;
 #endif
 
 
-user = string_nextinlist(&radius_args, &sep, big_buffer, big_buffer_size);
-if (!user) user = US"";
+if (!(user = string_nextinlist(&radius_args, &sep, NULL, 0))) user = US"";
 
 DEBUG(D_auth) debug_printf("Running RADIUS authentication for user \"%s\" "
                "and \"%s\"\n", user, radius_args);