CVE-2018-15208

Vulnerability

BPC SmartVista 2 (specifically the SmartVista Front-End SVFE version 2) is vulnerable to session fixation. The application accepts a user-supplied JSESSIONID cookie without verifying its origin, allowing an attacker to force a victim's browser to use a predetermined session identifier. This vulnerability exists in the login mechanism and requires no special configuration to be triggered [1].

Exploitation

An attacker first obtains a valid session cookie from the login page (e.g., by establishing a session themselves). They then craft a payload (e.g., via a malicious link or injected JavaScript) that sets the victim's JSESSIONID to the attacker's chosen value. When the victim accesses the application with the fixed cookie, the server accepts this session ID and associates it with the victim's subsequent authenticated requests. The attacker can then use the same session cookie to impersonate the victim [1].

Impact

Successful exploitation allows the attacker to hijack the victim's session and gain full access to their account. This can lead to unauthorized information disclosure, transaction manipulation, and other malicious activities on behalf of the victim. The impact includes both confidentiality and integrity breaches [1].

Mitigation

The available references do not provide a specific patch version or workaround from the vendor. Users should implement secure session management practices, such as regenerating session IDs upon successful authentication, using secure cookies (HttpOnly, Secure, SameSite), and validating client-side cookie integrity. Until a vendor fix is confirmed, immediate mitigation requires application-level changes to session handling [1].