[pve-devel] [PATCH manager] fix #3389: Skip CSRF token check also for API tokens on file upload

Lorenz Stechauner l.stechauner at proxmox.com
Wed Apr 21 13:59:43 CEST 2021


On file upload, the check for CSRF tokens was already skipped
when performing user authentication.This now happens for API
tokens also.

Signed-off-by: Lorenz Stechauner <l.stechauner at proxmox.com>
---
 PVE/HTTPServer.pm | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/PVE/HTTPServer.pm b/PVE/HTTPServer.pm
index 64976c7c..63b8583e 100755
--- a/PVE/HTTPServer.pm
+++ b/PVE/HTTPServer.pm
@@ -79,8 +79,8 @@ sub auth_handler {
 
     if ($require_auth) {
 	if ($api_token) {
+	    # returns tokenid actually
 	    $username = PVE::AccessControl::verify_token($api_token);
-	    $rpcenv->set_user($username); #actually tokenid in this case
 	} else {
 	    die "No ticket\n" if !$ticket;
 
@@ -94,25 +94,25 @@ sub auth_handler {
 		die "No ticket\n"
 		    if ($rel_uri ne '/access/tfa' || $method ne 'POST');
 	    }
+	}
 
-	    $rpcenv->set_user($username);
-
-	    if ($method eq 'POST' && $rel_uri =~ m|^/nodes/([^/]+)/storage/([^/]+)/upload$|) {
-		my ($node, $storeid) = ($1, $2);
-		# we disable CSRF checks if $isUpload is set,
-		# to improve security we check user upload permission here
-		my $perm = { check => ['perm', "/storage/$storeid", ['Datastore.AllocateTemplate']] };
-		$rpcenv->check_api2_permissions($perm, $username, {});
-		$isUpload = 1;
-	    }
+	$rpcenv->set_user($username);
 
-	    # we skip CSRF check for file upload, because it is
-	    # difficult to pass CSRF HTTP headers with native html forms,
-	    # and it should not be necessary at all.
-	    my $euid = $>;
-	    PVE::AccessControl::verify_csrf_prevention_token($username, $token)
-		if !$isUpload && ($euid != 0) && ($method ne 'GET');
+	if ($method eq 'POST' && $rel_uri =~ m|^/nodes/([^/]+)/storage/([^/]+)/upload$|) {
+	    my ($node, $storeid) = ($1, $2);
+	    # we disable CSRF checks if $isUpload is set,
+	    # to improve security we check user upload permission here
+	    my $perm = { check => ['perm', "/storage/$storeid", ['Datastore.AllocateTemplate']] };
+	    $rpcenv->check_api2_permissions($perm, $username, {});
+	    $isUpload = 1;
 	}
+
+	# we skip CSRF check for file upload, because it is
+	# difficult to pass CSRF HTTP headers with native html forms,
+	# and it should not be necessary at all.
+	my $euid = $>;
+	PVE::AccessControl::verify_csrf_prevention_token($username, $token)
+	    if !$isUpload && ($euid != 0) && ($method ne 'GET');
     }
 
     return {
-- 
2.20.1




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