ICS-CERT has released an additional security advisory to address the Advantech Studio directory traversal vulnerability.
Advantech Studio contains a vulnerability that could allow an unauthenticated, remote attacker to conduct directory traversal attacks on a targeted system.
The vulnerability is due to insufficient sanitization of user-supplied input by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted requests to the targeted system. Processing the requests could allow the attacker to conduct directory traversal attacks on the targeted system.
Proof-of-concept code that exploits this vulnerability is publicly available.
Reports indicate that Advantech has confirmed the vulnerability and released software updates; however, official confirmation from Advantech is not publicly available.
The following products are affected:
Advantech Studio version 7.0 and prior
Indusoft Studio version 7.0 and prior
Advantech no longer supports Studio; the product has been rebranded as Indusoft Web Studio.
To exploit this vulnerability, the attacker must send crafted requests to the targeted system. To achieve this objective, the attacker may require access to trusted, internal networks. This access requirement decreases the likelihood of a successful exploit.
An unauthenticated, remote attacker could exploit this vulnerability to access arbitrary file locations on the targeted system. An attacker could use the information to launch further attacks.
The vulnerability exists in the CreateFileW function of the sub_401A90 routine in the NTWebServer.exe file used by the affected software.
Additional technical information is not available.
Administrators are advised to apply the appropriate updates.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to monitor affected systems.
Indusoft customers are advised to obtain updated patches through their normal support channels.
Version 1, January 9, 2013, 1:04 PM: Advantech Studio contains a vulnerability that could allow an unauthenticated, remote attacker to conduct directory traversal attacks on the targeted system. Updates are not available.
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