TITLE:
Cfengine Insecure Temporary File Creation Vulnerabilities

SECUNIA ADVISORY ID:
SA17037

VERIFY ADVISORY:
http://secunia.com/advisories/17037/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
Cfengine 1.x
http://secunia.com/product/5790/
Cfengine 2.x
http://secunia.com/product/2248/

DESCRIPTION:
Javier Fernandez-Sanguino Pena has reported some vulnerabilities in
Cfengine, which can be exploited by malicious, local users to perform
certain actions on a vulnerable system with escalated privileges.

1) Temporary files are being created insecurely in "/tmp" by
"contrib/vicf.in" This can be exploited via symlink attacks to create
or overwrite arbitrary files with the privileges of the user running
the affected script.

The vulnerability affects version 1.6.5 and 2.1.16. Other versions
may also be vulnerable.

2) Temporary files are being created insecurely in "/tmp" by
"/bin/cfmailfilter" and "/contrib/cfcron.in". This can be exploited
via symlink attacks to create or overwrite arbitrary files with the
privileges of the user running the affected script.

The vulnerability affects version 1.6.5. Prior versions may also be
affected.

SOLUTION:
Grant only trusted users access to affected systems.

Some Linux vendors have issued fixed packages.

PROVIDED AND/OR DISCOVERED BY:
Javier Fernandez-Sanguino Pena

ORIGINAL ADVISORY:
Debian:
http://www.debian.org/security/2005/dsa-835
http://www.debian.org/security/2005/dsa-836

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