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.

Multiple heap-based buffer overflows in Huawei Campus Series Switches S3700HI, S5700, S6700, S3300HI, S5300, S6300, S9300, S7700, and LSW S9700 with software V200R001 before V200R001SPH013; S5700, S6700, S5300, and S6300 with software V200R002 before V200R002SPH005; S7700, S9300, S9300E, S5300, S5700, S6300, S6700, S2350, S2750, and LSW S9700 with software V200R003 before V200R003SPH005; and S7700, S9300, S9300E, and LSW S9700 with software V200R005 before V200R005C00SPC300 allow remote attackers to cause a denial of service (device restart) via a crafted length field in a packet.