Vulnerability identifier: #VU43732

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-4277

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Smarty
Web applications / CMS

Vendor: smarty.php.net

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in the smarty_function_html_options_optoutput function in distribution/libs/plugins/function.html_options.php in Smarty before 3.1.8. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Smarty: 1.0 - 1.0a, 1.1.0, 1.2.0 - 1.2.2, 1.3.0 - 1.3.2, 1.4.0 - 1.4.6, 1.5.0 - 1.5.2, 2.0.0 - 2.0.1, 2.1.0 - 2.1.1, 2.2.0, 2.3.0 - 2.3.1, 2.4.0 - 2.4.2, 2.5.0, 2.6.0 - 2.6.26, 3.0.0 - 3.0.7, 3.1 - 3.1.6

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External links
http://code.google.com/p/smarty-php/issues/detail?id=98&can=1
http://code.google.com/p/smarty-php/source/detail?r=4612
http://secunia.com/advisories/49164
http://smarty-php.googlecode.com/svn/trunk/distribution/change_log.txt
http://www.securitytracker.com/id?1027061

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.