Session fixation vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are 02 or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are 01 or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are 08 or before, RD81MES96N MES Interface Module First 2 digits of serial number are 04 or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are 04 or before) allows a remote unauthenticated attacker to stop the network functions of the products via a specially crafted packet.
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 |
|---|---|---|---|
| Melsec_iq-rj71eip91_firmware | Mitsubishielectric | - (including) | - (including) |
Such a scenario is commonly observed when:
In the generic exploit of session fixation vulnerabilities, an attacker creates a new session on a web application and records the associated session identifier. The attacker then causes the victim to associate, and possibly authenticate, against the server using that session identifier, giving the attacker access to the user’s account through the active session.