Secunia Security Advisory - Aliaksandr Hartsuyeu has reported two vulnerabilities in Guestex, which can be exploited by malicious people to conduct cross-site scripting attacks and to compromise a vulnerable system.
159e86b54cad58b12e2f8589fbecdaf52f6659d20efaea02be25b57169ce5d0f
TITLE:
Guestex Shell Command Injection and Cross-Site Scripting
SECUNIA ADVISORY ID:
SA18927
VERIFY ADVISORY:
http://secunia.com/advisories/18927/
CRITICAL:
Highly critical
IMPACT:
Cross Site Scripting, System access
WHERE:
>From remote
SOFTWARE:
Guestex 1.x
http://secunia.com/product/8125/
DESCRIPTION:
Aliaksandr Hartsuyeu has reported two vulnerabilities in Guestex,
which can be exploited by malicious people to conduct cross-site
scripting attacks and to compromise a vulnerable system.
1) Input passed to the "mail" parameter in guestex.pl isn't properly
sanitised before being passed to sendmail as an argument. This can be
exploited to inject arbitrary shell commands.
2) Input passed to the "url" parameter isn't properly sanitised
before being returned to the user. This can be exploited to execute
arbitrary HTML and script code in a user's browser session in context
of an affected site.
The vulnerabilities have been reported in version 1.0. Other versions
may also be affected.
SOLUTION:
Edit the source code to ensure that input is properly sanitised.
PROVIDED AND/OR DISCOVERED BY:
Aliaksandr Hartsuyeu
ORIGINAL ADVISORY:
http://evuln.com/vulns/76/description.html
http://evuln.com/vulns/77/description.html
----------------------------------------------------------------------
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.
----------------------------------------------------------------------