diff mbox series

[Openvpn-devel,v1] clean up environment variable handling in verify_user_pass_script

Message ID 20251030194402.1729-1-gert@greenie.muc.de
State New
Headers show
Series [Openvpn-devel,v1] clean up environment variable handling in verify_user_pass_script | expand

Commit Message

Gert Doering Oct. 30, 2025, 7:43 p.m. UTC 
From: Arne Schwabe <arne@rfc2549.org>

The username environment variable is already set by the
set_verify_user_pass_env function before the verify_user_pass_script
function is called, so this call is not doing anything but might erroneously
made people think that this needs to be cleaned up.

Also ensure that the password is clean from the env even in an error case.

Reported-by: Joshua Rogers <contact@joshua.hu>
Found-by: ZeroPath (https://zeropath.com/)
Change-Id: I6c502508026c6b85bb092ada4d16d985b20dd41f
Signed-off-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1326
---

This change was reviewed on Gerrit and approved by at least one
developer. I request to merge it to master.

Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1326
This mail reflects revision 1 of this Change.

Signed-off-by line for the author was added as per our policy.

Acked-by according to Gerrit (reflected above):
Gert Doering <gert@greenie.muc.de>

Comments

Gert Doering Oct. 30, 2025, 8:55 p.m. UTC | #1 
Stared at the code (verified the claims about "username is already
exported"), and ran this through the t_server tests which do need a
working script/plugin env.  Works.

Your patch has been applied to the master branch.

commit 3fbba254b8645d2d1241e59f6ebd05e85ce05b52
Author: Arne Schwabe
Date:   Thu Oct 30 20:43:56 2025 +0100

     clean up environment variable handling in verify_user_pass_script

     Signed-off-by: Arne Schwabe <arne-openvpn@rfc2549.org>
     Acked-by: Gert Doering <gert@greenie.muc.de>
     Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1326
     Message-Id: <20251030194402.1729-1-gert@greenie.muc.de>
     URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg34069.html
     Signed-off-by: Gert Doering <gert@greenie.muc.de>


--
kind regards,

Gert Doering
diff mbox series

Patch

diff --git a/src/openvpn/ssl_verify.c b/src/openvpn/ssl_verify.c
index 04ef27e..993d22c 100644
--- a/src/openvpn/ssl_verify.c
+++ b/src/openvpn/ssl_verify.c
@@ -1329,7 +1329,7 @@ 
     }
     else
     {
-        setenv_str(session->opt->es, "username", up->username);
+        /* username env is already set by set_verify_user_pass_env */
         setenv_str(session->opt->es, "password", up->password);
     }
 
@@ -1377,10 +1377,6 @@ 
         /* purge auth control filename (and file itself) for non-deferred returns */
         key_state_rm_auth_control_files(&ks->script_auth);
     }
-    if (!session->opt->auth_user_pass_verify_script_via_file)
-    {
-        setenv_del(session->opt->es, "password");
-    }
 
 done:
     if (tmp_file && strlen(tmp_file) > 0)
@@ -1389,6 +1385,11 @@ 
     }
 
 error:
+    if (!session->opt->auth_user_pass_verify_script_via_file)
+    {
+        setenv_del(session->opt->es, "password");
+    }
+
     argv_free(&argv);
     gc_free(&gc);
     return retval;