Bug 244860

Summary:	tcpdump -Z -C should drop root privileges completely
Product:	[Fedora] Fedora	Reporter:	Miroslav Lichvar <mlichvar>
Component:	tcpdump	Assignee:	Miroslav Lichvar <mlichvar>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	3.9.7-1.fc7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-07-31 22:55:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Miroslav Lichvar 2007-06-19 14:54:38 UTC

Description of problem:
tcpdump sets only effective uid and gid when -Z option is used (enabled by
default) with -C option. It is a result of the patch for bug #176010.

Setting only euid removes an extra security layer that might otherwise have
mitigated an eventual security problem.

A better solution for the bug is to call setuid() before the first file is
opened, then all files will have pcap owner and tcpdump can drop root privileges
completely.

Version-Release number of selected component (if applicable):
tcpdump-3.9.5-3.fc7

Steps to Reproduce:
1. tcpdump -C 1 -w dump
2. cat /proc/{tcpdump}/status | grep Uid
  
Actual results:
Uid:	0	77	0	77

Expected results:
Uid:	77	77	77	77

Comment 1 Miroslav Lichvar 2007-07-25 08:48:45 UTC

Fixed in tcpdump-3.9.7-1.fc8.

Comment 2 Fedora Update System 2007-07-31 22:55:26 UTC

tcpdump-3.9.7-1.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.