Huawei eSpace U1900 switch series provides professional IP voice solutions to meet communications requirements from various enterprises of different sizes. Huawei eSpace U1900 series includes eSpace U1910, U1911, U1930, U1960, U1980, and U1981.
The U1900 series uses the Command Line Interface (CLI) module to process command line login and interaction. The CLI module enables CLI clients to log in to the U1900 devices and to manage and maintain U1900 devices using command lines.
A vulnerability exists in the exception handling mechanism of the U1900 CLI module. An attacker may exploit this vulnerability to launch DoS attacks, which make the CLI function unavailable. (Vulnerability ID: HWPSIRT-2015-08046)
The attacker accesses the network that the U1900 series resides. If a user uses SSH to log in to the CLI module, the attacker sends specific abnormal packets to the U1900 devices and makes the CLI function unavailable because the U1900 devices handles such exceptions improperly.
This vulnerability was reported privately to Huawei by Mickey Shkatov from Intel Advanced Threat Research Team and Jesse Michael from Intel. Huawei expresses our appreciation for Mickey Shkatov’s and Jesse Michael’s coordinated vulnerability disclosure with Huawei.
Huawei PSIRT is not aware of any malicious use of the vulnerabilities described in this advisory.
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