Bug 241677 - tcpdump -Z -C should drop root privileges completely
tcpdump -Z -C should drop root privileges completely
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: tcpdump (Show other bugs)
5.0
All Linux
medium Severity medium
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Assigned To: Miroslav Lichvar
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Depends On:
Blocks:
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Reported: 2007-05-29 10:54 EDT by Miroslav Lichvar
Modified: 2007-11-30 17:07 EST (History)
0 users

See Also:
Fixed In Version: RHSA-2007-0368
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2007-11-07 10:33:34 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Miroslav Lichvar 2007-05-29 10:54:23 EDT
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-3.9.4-8.1

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 RHEL Product and Program Management 2007-05-29 11:04:20 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.
Comment 6 errata-xmlrpc 2007-11-07 10:33:34 EST
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2007-0368.html

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