CVE-2017-17910— Hoermann BiSecur设备安全漏洞

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On Hoermann BiSecur devices before 2018, a vulnerability can be exploited by recording a single radio transmission. An attacker can intercept an arbitrary radio frame exchanged between a BiSecur transmitter and a receiver to obtain the encrypted packet and the 32-bit serial number. The interception of the one-time pairing process is specifically not required. Due to use of AES-128 with an initial static random value and static data vector (all of this static information is the same across different customers' installations), the attacker can easily derive the utilized encryption key and decrypt the intercepted packet. The key can be verified by decrypting the intercepted packet and checking for known plaintext. Subsequently, an attacker can create arbitrary radio frames with the correct encryption key to control BiSecur garage and entrance gate operators and possibly other BiSecur systems as well ("wireless cloning"). To conduct the attack, a low cost Software Defined Radio (SDR) is sufficient. This affects Hoermann Hand Transmitter HS5-868-BS, HSE1-868-BS, and HSE2-868-BS devices.

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Hoermann BiSecur设备安全漏洞

Hoermann BiSecur devices是德国霍曼（Hoermann）公司的一款防盗门遥控器设备。 Hoermann BiSecur设备2018之前版本中存在安全漏洞。攻击者可通过记录单个无线电广播利用该漏洞拦截BiSecur发射器和接收器之间的无线电帧，获取加密的数据包和32位的序列号，获取加密密钥并解密拦截的数据包。

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