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Secunia Security Advisory 32947

Secunia Security Advisory 32947
Posted Dec 2, 2008
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Some vulnerabilities have been reported in Zaptel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) and potentially gain escalated privileges.

tags | advisory, denial of service, local, vulnerability
SHA-256 | 431daed36b557e940494d4ee6855731ca2264623f29dd3a32f42824590237bbf

Secunia Security Advisory 32947

Change Mirror Download
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Did you know that a change in our assessment rating, exploit code
availability, or if an updated patch is released by the vendor, is
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http://secunia.com/advisories/business_solutions/

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TITLE:
Zaptel "ZT_SPANCONFIG" IOCTL Privilege Escalation Vulnerabilities

SECUNIA ADVISORY ID:
SA32947

VERIFY ADVISORY:
http://secunia.com/advisories/32947/

CRITICAL:
Not critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
Zaptel 1.x
http://secunia.com/advisories/product/20644/

DESCRIPTION:
Some vulnerabilities have been reported in Zaptel, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service) and potentially gain escalated privileges.

The vulnerabilities are caused due to the "tor2_spanconfig()"
function in kernel/tor2.c and the "torisa_spanconfig()" function in
kernel/torisa.c not properly sanitising the "sync" field of the
"ZT_SPANCONFIG" IOCTL. This can potentially be exploited to gain
escalated privileges by sending a specially crafted "ZT_SPANCONFIG"
IOCTL to a vulnerable driver.

Successful exploitation requires that the driver for the "Tormenta 2
Quad-T1 PCI" or "Tormenta ISA" card is used.

SOLUTION:
Fixed in the SVN repository.

Zaptel 1.2.x:
http://svn.digium.com/view/zaptel?view=rev&revision=4587

Zaptel 1.4.x:
http://svn.digium.com/view/zaptel?view=rev&revision=4588

PROVIDED AND/OR DISCOVERED BY:
Tzafrir Cohen

ORIGINAL ADVISORY:
Digium Bug #13954:
http://bugs.digium.com/view.php?id=13954

Debian Bug #507459:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=507459

----------------------------------------------------------------------

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/advisories/secunia_security_advisories/

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