The user authentication module in Huawei Campus switches S5700, S5300, S6300, and S6700 with software before V200R001SPH012 and S7700, S9300, and S9700 with software before V200R001SPH015 allows remote attackers to cause a denial of service (device restart) via vectors involving authentication, which trigger an array access violation.

Huawei AC6605 with software V200R001C00; AC6605 with software V200R002C00; ACU with software V200R001C00; ACU with software V200R002C00; S2300, S3300, S2700, S3700 with software V100R006C05 and earlier versions; S5300, S5700, S6300, S6700 with software V100R006, V200R001, V200R002, V200R003, V200R005C00SPC300 and earlier versions; S7700, S9300, S9300E, S9700 with software V100R006, V200R001, V200R002, V200R003, V200R005C00SPC300 and earlier versions could allow remote attackers to send a special SSH packet to the VRP device to cause a denial of service.

Huawei S9300 with software before V100R006SPH013 and S2300,S3300,S5300,S6300 with software before V100R006SPH010 support Y.1731 and therefore have the Y.1731 vulnerability in processing special packets. The vulnerability causes the restart of switches.