description: A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions < V5.2), Nucleus ReadyStart V3 (All versions < V2012.12), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). Initial Sequence Numbers (ISNs) for TCP connections are derived from an insufficiently random source. As a result, the ISN of current and future TCP connections could be predictable. An attacker could hijack existing sessions or spoof future ones.
problem types: CWE-342: Predictable Exact Value from Previous Values
affected:
{
vendor: Siemens
product: APOGEE PXC Compact (BACnet)
versions:
version: All versions < V3.5.5, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: APOGEE PXC Compact (P2 Ethernet)
versions:
version: All versions < V2.8.20, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: APOGEE PXC Modular (BACnet)
versions:
version: All versions < V3.5.5, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: APOGEE PXC Modular (P2 Ethernet)
versions:
version: All versions < V2.8.20, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: Nucleus NET
versions:
version: All versions < V5.2, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: Nucleus ReadyStart V3
versions:
version: All versions < V2012.12, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: Nucleus Source Code
versions:
version: All versions, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: PLUSCONTROL 1st Gen
versions:
version: All versions, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: TALON TC Compact (BACnet)
versions:
version: All versions < V3.5.5, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: TALON TC Modular (BACnet)
versions:
version: All versions < V3.5.5, status: affected
defaultStatus: unknown
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C
baseScore: 6.5
baseSeverity: MEDIUM
]