CVE-2017-9861
CriticalSummary
An issue was discovered in SMA Solar Technology products related to the SIP implementation, which does not properly use authentication with encryption. This makes it vulnerable to replay attacks, packet injection attacks, and man in the middle attacks.
Risk Assessment
An attacker can communicate with the device within the LAN, potentially leading to device crashes, disruption of communication with SMA servers, and leakage of sensitive information. Additionally, the lack of encryption allows for eavesdropping on communications.
Recommendation
It is recommended to implement encryption and appropriate authentication mechanisms to secure SIP communications. Consider updating or replacing vulnerable devices.
Original NVD description (English source)
An issue was discovered in SMA Solar Technology products. The SIP implementation does not properly use authentication with encryption: it is vulnerable to replay attacks, packet injection attacks, and man in the middle attacks. An attacker is able to successfully use SIP to communicate with the device from anywhere within the LAN. An attacker may use this to crash the device, stop it from communicating with the SMA servers, exploit known SIP vulnerabilities, or find sensitive information from the SIP communications. Furthermore, because the SIP communication channel is unencrypted, an attacker capable of understanding the protocol can eavesdrop on communications. For example, passwords can be extracted. NOTE: the vendor's position is that authentication with encryption is not required on an isolated subnetwork. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected