CVE-2021-31886

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). FTP server does not properly validate the length of the “USER” command, leading to stack-based buffer overflows. This may result in Denial-of-Service conditions and Remote Code Execution. (FSMD-2021-0010)

• siemens nucleus net • siemens nucleus readystart v3 (< 2017.02.4) • siemens nucleus source code • siemens apogee modular building controller firmware • siemens apogee modular equiment controller firmware • siemens apogee pxc compact firmware (< 2.8.19) • siemens apogee pxc compact firmware (< 3.5.4) • siemens apogee pxc modular firmware (< 2.8.19) • siemens apogee pxc modular firmware (< 3.5.4) • siemens talon tc compact firmware (< 3.5.4) • siemens talon tc modular firmware (< 3.5.4) • siemens desigo pxc00-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc00-u firmware (>= 2.3 < 6.30.016) • siemens desigo pxc001-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc12-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc22-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc22.1-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc36.1-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc50-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc64-u firmware (>= 2.3 < 6.30.016) • siemens desigo pxc100-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxc128-u firmware (>= 2.3 < 6.30.016) • siemens desigo pxc200-e.d firmware (>= 2.3 < 6.30.016) • siemens desigo pxm20-e firmware (>= 2.3 < 6.30.016)