IBM i Access Client Solutions (ACS) 1.1.2 through 1.1.4 and 1.1.4.3 through 1.1.9.4 is vulnerable to NT LAN Manager (NTLM) hash disclosure by an attacker modifying UNC capable paths within ACS configuration files to point to a hostile server. If NTLM is enabled, the Windows operating system will try to authenticate using the current users session. The hostile server could capture the NTLM hash information to obtain the users credentials. IBM X-Force ID: 279091.
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| I_access_client_solutions | Ibm | 1.1.2 (including) | 1.1.4 (including) |
| I_access_client_solutions | Ibm | 1.1.4.3 (including) | 1.1.9.4 (including) |
Such a scenario is commonly observed when: