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TITLE:
SILC Server and Toolkit Insecure Temporary File Creation

SECUNIA ADVISORY ID:
SA16659

VERIFY ADVISORY:
http://secunia.com/advisories/16659/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
SILC Secure Internet Live Conferencing Server 1.x
http://secunia.com/product/1029/
SILC Secure Internet Live Conferencing Toolkit 0.9.x
http://secunia.com/product/5646/

DESCRIPTION:
Eric Romang has reported a vulnerability in SILC Server and Toolkit,
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 silcd.c to store server statistics. This can
be exploited via symlink attacks to create or overwrite arbitrary
files with the privileges of the user running the affected
application.

The vulnerability has been reported in SILC Server versions 1.0 and
prior, and in SILC Toolkit versions 0.9.12-r3 and prior.

SOLUTION:
Grant only trusted users access to affected systems.

PROVIDED AND/OR DISCOVERED BY:
Eric Romang, ZATAZ Audit.

ORIGINAL ADVISORY:
http://www.zataz.net/adviso/silc-server-toolkit-06152005.txt

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


Please Note:
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Secunia NEVER sends attached files with advisories.
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