Vixie Cron 'do_command.c' May Let Local Users Gain Elevated Privileges
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SecurityTracker Alert ID: 1016480
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SecurityTracker URL: http://securitytracker.com/id?1016480
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CVE Reference: CVE-2006-2607
(Links to External Site)
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OSVDB Reference: 25850
(Links to External Site)
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Date: Jul 12 2006
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Impact: Execution of arbitrary code via local system, Root access via local system
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Version(s): 4.1
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Description: A vulnerability was reported in Vixie cron. A local user can obtain elevated privileges on the target system.
When the '/etc/security/limits.conf' file has been configured with limits for a user and that user has sufficient privileges to execute
cron, the user can exceed the limits to execute arbitrary programs with root privileges. The 'do_command.c' code does not check
the return code of a setuid call and may permit the command when it should not be permitted.
Roman Veretelnikov reported this
vulnerability in January 2006.
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Impact: A local user can obtain elevated privileges on the target system.
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Solution: No solution was available at the time of this entry.
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Cause: Access control error, State error
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Underlying OS: Linux (Any), UNIX (Any)
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Reported By: Justin M. Forbes <jmforbes@rpath.com>
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: May 25 2006 07:31PM
From: Justin M. Forbes <jmforbes@rpath.com>
Subject: rPSA-2006-0082-1 vixie-cron
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rPath Security Advisory: 2006-0082-1
Published: 2006-05-25
Products: rPath Linux 1
Rating: Critical
Exposure Level Classification:
Local Root Deterministic Privilege Escalation
Updated Versions:
vixie-cron=/conary.rpath.com@rpl:devel//1/4.1-5.2-1
References:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-xxxx-xxxx
http://bugs.rpath.com/show_bug.cgi?id=1166
Description:
In previous versions of the vixie-cron package, when the
/etc/security/limits.conf file has been set up with limits for
any user, and that user has permission to use the cron facility,
that user can use vixie-cron to run arbitrary programs as root by
exceeding the limits set in /etc/security/limits.conf.
By default, rPath Linux does not include any limits configured
in the /etc/security/limits.conf file. The /etc/security/limits.conf
file is provided by the pam:data component, so to determine whether
it has been changed in any way, run the command:
# conary verify pam:data | grep /etc/security/limits.conf
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