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), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name label parsing functionality does not properly validate the null-terminated name in DNS-responses. The parsing of malformed responses could result in a read past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition or leak the read memory.
problem types: CWE-170: Improper Null Termination
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, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: Nucleus ReadyStart V3
versions:
version: All versions < V2017.02.3, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: Nucleus ReadyStart V4
versions:
version: All versions < V4.1.0, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: Nucleus Source Code
versions:
version: Versions including affected DNS modules, status: affected
defaultStatus: unknown
}
{
vendor: Siemens
product: SIMOTICS CONNECT 400
versions:
version: All versions < V0.5.0.0, 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:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:P/RL:O/RC:C
baseScore: 6.5
baseSeverity: MEDIUM
]