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Test ID:1.3.6.1.4.1.25623.1.0.870550
Category:Red Hat Local Security Checks
Title:RedHat Update for vixie-cron RHSA-2012:0304-03
Summary:The remote host is missing an update for the 'vixie-cron'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'vixie-cron'
package(s) announced via the referenced advisory.

Vulnerability Insight:
The vixie-cron package contains the Vixie version of cron. Cron is a
standard UNIX daemon that runs specified programs at scheduled times. The
vixie-cron package adds improved security and more powerful configuration
options to the standard version of cron.

A race condition was found in the way the crontab program performed file
time stamp updates on a temporary file created when editing a user crontab
file. A local attacker could use this flaw to change the modification time
of arbitrary system files via a symbolic link attack. (CVE-2010-0424)

Red Hat would like to thank Dan Rosenberg for reporting this issue.

This update also fixes the following bugs:

* Cron jobs of users with home directories mounted on a Lightweight
Directory Access Protocol (LDAP) server or Network File System (NFS) were
often refused because jobs were marked as orphaned (typically due to a
temporary NSS lookup failure, when NIS and LDAP servers were unreachable).
With this update, a database of orphans is created, and cron jobs are
performed as expected. (BZ#455664)

* Previously, cron did not log any errors if a cron job file located in the
/etc/cron.d/ directory contained invalid entries. An upstream patch has
been applied to address this problem and invalid entries in the cron job
files now produce warning messages. (BZ#460070)

* Previously, the '@reboot' crontab macro incorrectly ran jobs when the
crond daemon was restarted. If the user used the macro on multiple
machines, all entries with the '@reboot' option were executed every time
the crond daemon was restarted. With this update, jobs are executed only
when the machine is rebooted. (BZ#476972)

* The crontab utility is now compiled as a position-independent executable
(PIE), which enhances the security of the system. (BZ#480930)

* When the parent crond daemon was stopped, but a child crond daemon was
running (executing a program), the 'service crond status' command
incorrectly reported that crond was running. The source code has been
modified, and the 'service crond status' command now correctly reports that
crond is stopped. (BZ#529632)

* According to the pam(8) manual page, the cron daemon, crond, supports
access control with PAM (Pluggable Authentication Module). However, the PAM
configuration file for crond did not export environment variables correctly
and, consequently, setting PAM variables via cron did not work. This update
includes a corrected /etc/pam.d/crond file that exports environmen ...

Description truncated, please see the referenced URL(s) for more information.

Affected Software/OS:
vixie-cron on Red Hat Enterprise Linux (v. 5 server)

Solution:
Please Install the Updated Packages.

CVSS Score:
3.3

CVSS Vector:
AV:L/AC:M/Au:N/C:N/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2010-0424
BugTraq ID: 38391
http://www.securityfocus.com/bid/38391
http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035762.html
http://secunia.com/advisories/38700
http://secunia.com/advisories/38741
http://secunia.com/advisories/48104
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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