SB2017011301 - SQL injection and authentication bypass in Advantech WebAccess

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) SQL injection (CVE-ID: CVE-2017-5154)

The vulnerability allows a remote attacker to execute arbitrary SQL commands in web application database.

The vulnerability exists due to insufficient sanitization of user-supplied data passed to updateTemplate.aspx script in Advantech WebAccess. A remote authenticated attacker can send a specially crafted HTTP request to vulnerable script and execute arbitrary SQL commands in web application database.

Successful exploitation of the vulnerability may allow an attacker to gain administrative access to vulnerable web application.

Note: authentication is required to exploit this vulnerability, however another vulnerability, described in this advisory, can be used to bypass authentication process.

2) Authentication bypass (CVE-ID: CVE-2017-5152)

The vulnerability allows a remote attacker to bypass authentication.

The vulnerability exists due to incorrectly imposed permissions to specific URL. A remote attacker can use a specially crafted URL to gain unauthorized access to Advantech WebAccess.

Successful exploitation will grant an attacker unauthorized access to web application.

Remediation

Install update from vendor's website.

References

• https://ics-cert.us-cert.gov/advisories/ICSA-17-012-01
• http://www.zerodayinitiative.com/advisories/ZDI-17-043/