Bug 1134412

Summary:	ncat displays debug message during normal use
Product:	Red Hat Enterprise Linux 7	Reporter:	Martin Žember <mzember>
Component:	nmap	Assignee:	Michal Hlavinka <mhlavink>
Status:	CLOSED ERRATA	QA Contact:	Jaroslav Aster <jaster>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0	CC:	ebenes, jaster, ovasik
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	nmap-6.40-5.el7	Doc Type:	Bug Fix
Doc Text:	Previously, the ncat utility printed debug messages even when verbose mode was not enabled. As a consequence, after connecting through an HTTP proxy, a debug message was displayed together with the received data, which could interfere with the automated processing of standard output. With this update, ncat prints debug messages only in verbose mode as expected.	Story Points:	---
Clone Of:	1000770	Environment:
Last Closed:	2015-11-19 12:49:11 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1000770
Bug Blocks:

Description Martin Žember 2014-08-27 13:15:57 UTC

This bug exists also on RHEL-7.

Version-Release number of selected component (if applicable):
nmap-6.40-4.el7

+++ This bug was initially created as a clone of Bug #1000770 +++

Description of problem:
When using ncat to connect through a HTTP proxy a debug message is displayed on screen. This breaks automated use of ncat.

$ /usr/bin/ncat --proxy-type http --proxy proxy.example.com:3128 www.example.com 443
NCAT DEBUG: Proxy returned status code 200.

Version-Release number of selected component (if applicable):
nmap-5.51-2.el6.i686

How reproducible:
Use ncat to connect through a HTTP proxy.

Steps to Reproduce:
1. see above
2.
3.

Actual results:
Debug message displayed.

Expected results:
No message displayed unless verbose output has been requested.

Additional info:
Fedora 19 had same bug (ticket 994376). If you ask why I'm using "ncat" instead of "nc", that's because "nc" is even more broken for use of HTTP proxy:

$ nc -X connect -x www.example.com:3128 www.example.com 443
nc: Proxy error: "HTTP/1.1 200 Connection established"

Comment 6 errata-xmlrpc 2015-11-19 12:49:11 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2137.html