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TITLE:
HylaFAX Insecure Temporary File Creation Vulnerability

SECUNIA ADVISORY ID:
SA16906

VERIFY ADVISORY:
http://secunia.com/advisories/16906/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
HylaFAX 4.x
http://secunia.com/product/2528/

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

The vulnerability is caused due to temporary files being created
insecurely in "/tmp" by the "xferfaxstats" script. 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 has been reported in version 4.2.1. Other versions
may also be vulnerable.

SOLUTION:
Grant only trusted users access to affected systems.

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

ORIGINAL ADVISORY:
Debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=329384

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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