title: WAGO: PLC families 750-88x and 750-352 prone to DoS attack
description: Older firmware versions (FW1 up to FW10) of the WAGO PLC family 750-88x and 750-352 are vulnerable for a special denial of service attack.
problem types: CWE-400 Uncontrolled Resource Consumption
affected:
{
product: 750-331/xxx-xxx
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-352
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-829
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-831/xxx-xxx
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-852
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-880/xxx-xxx
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-881
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-882
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-885
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
{
product: 750-889
vendor: WAGO
versions:
status: affected, version: FW1<=FW10
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
solutions: Update the device to the latest FW version.
workarounds: Restrict network access to the device.
Do not directly connect the device to the internet
Disable unused TCP/UDP-ports