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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
vixie-cron Security Update
[RHSA-2006:0539-9]
July 13, 2006 23:00 GMT Number Q-247
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PROBLEM: A privilege escalation flaw was found in the way Vixie Cron
runs programs; vixie-cron does not properly verify an attempt
to set the current process user id succeeded.
PLATFORM: Red Hat Desktop (v. 4)
Red Hat Enterprise Linux AS (v. 4)
Red Hat Enterprise Linux ES (v. 4)
Red Hat Enterprise Linux WS (v. 4)
DAMAGE: It was possible for a malicious local users who exhausted
certain limits to execute arbitrary commands as root via cron.
SOLUTION: Apply current patches.
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VULNERABILITY The risk is MEDIUM. A local user can run commands as root.
ASSESSMENT:
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LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-247.shtml
ORIGINAL BULLETIN: https://rhn.redhat.com/errata/RHSA-2006-0539.html
CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2607
______________________________________________________________________________
[***** Start RHSA-2006:0539-9 *****]
Important: vixie-cron security update
Advisory: RHSA-2006:0539-9
Type: Security Advisory
Issued on: 2006-07-12
Last updated on: 2006-07-12
Affected Products: Red Hat Desktop (v. 4)
Red Hat Enterprise Linux AS (v. 4)
Red Hat Enterprise Linux ES (v. 4)
Red Hat Enterprise Linux WS (v. 4)
CVEs (cve.mitre.org): CVE-2006-2607
Details
Updated vixie-cron packages that fix a privilege escalation issue are now
available.
This update has been rated as having important security impact by the Red Hat
Security Response Team.
The vixie-cron package contains the Vixie version of cron. Cron is a
standard UNIX daemon that runs specified programs at scheduled times.
A privilege escalation flaw was found in the way Vixie Cron runs programs;
vixie-cron does not properly verify an attempt to set the current process
user id succeeded. It was possible for a malicious local users who
exhausted certain limits to execute arbitrary commands as root via cron.
(CVE-2006-2607)
All users of vixie-cron should upgrade to these updated packages, which
contain a backported patch to correct this issue.
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
This update is available via Red Hat Network. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
Updated packages
Red Hat Desktop (v. 4)
SRPMS:
vixie-cron-4.1-44.EL4.src.rpm 84ffd65a8877af47400a731ecd1b9ee3
IA-32:
vixie-cron-4.1-44.EL4.i386.rpm 96f8e56c7683001feb3f3af160e5d3bc
x86_64:
vixie-cron-4.1-44.EL4.x86_64.rpm 3d045241d3453e8bc5a6bc260320fbc9
Red Hat Enterprise Linux AS (v. 4)
SRPMS:
vixie-cron-4.1-44.EL4.src.rpm 84ffd65a8877af47400a731ecd1b9ee3
IA-32:
vixie-cron-4.1-44.EL4.i386.rpm 96f8e56c7683001feb3f3af160e5d3bc
IA-64:
vixie-cron-4.1-44.EL4.ia64.rpm a8d8d2c094a1d9aa1e8b565633f63491
PPC:
vixie-cron-4.1-44.EL4.ppc.rpm abbfe3611ef001871714d508cb12ee78
s390:
vixie-cron-4.1-44.EL4.s390.rpm 13a5b37c0c9c360055a75c3b779603c9
s390x:
vixie-cron-4.1-44.EL4.s390x.rpm 869131c337de109964f8acb2e720ee33
x86_64:
vixie-cron-4.1-44.EL4.x86_64.rpm 3d045241d3453e8bc5a6bc260320fbc9
Red Hat Enterprise Linux ES (v. 4)
SRPMS:
vixie-cron-4.1-44.EL4.src.rpm 84ffd65a8877af47400a731ecd1b9ee3
IA-32:
vixie-cron-4.1-44.EL4.i386.rpm 96f8e56c7683001feb3f3af160e5d3bc
IA-64:
vixie-cron-4.1-44.EL4.ia64.rpm a8d8d2c094a1d9aa1e8b565633f63491
x86_64:
vixie-cron-4.1-44.EL4.x86_64.rpm 3d045241d3453e8bc5a6bc260320fbc9
Red Hat Enterprise Linux WS (v. 4)
SRPMS:
vixie-cron-4.1-44.EL4.src.rpm 84ffd65a8877af47400a731ecd1b9ee3
IA-32:
vixie-cron-4.1-44.EL4.i386.rpm 96f8e56c7683001feb3f3af160e5d3bc
IA-64:
vixie-cron-4.1-44.EL4.ia64.rpm a8d8d2c094a1d9aa1e8b565633f63491
x86_64:
vixie-cron-4.1-44.EL4.x86_64.rpm 3d045241d3453e8bc5a6bc260320fbc9
(The unlinked packages above are only available from the Red Hat Network)
Bugs fixed (see bugzilla for more information)
193146 - CVE-2006-2607 Jobs start from root when pam_limits enabled
References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2607
http://www.redhat.com/security/updates/classification/#important
[***** End RHSA-2006:0539-9 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Red Hat for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
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