description: A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
problem types: CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
affected:
{
vendor: Zyxel
product: ATP series firmware
versions:
version: 4.32 through 5.36 Patch 1, status: affected
}
{
vendor: Zyxel
product: USG FLEX series firmware
versions:
version: 4.50 through 5.36 Patch 1, status: affected
}
{
vendor: Zyxel
product: USG FLEX 50(W) firmware
versions:
version: 4.25 through 5.36 Patch 1, status: affected
}
{
vendor: Zyxel
product: USG20(W)-VPN firmware
versions:
version: 4.25 through 5.36 Patch 1, status: affected
}
{
vendor: Zyxel
product: VPN series firmware
versions:
version: 4.30 through 5.36 Patch 1, status: affected
}
{
vendor: Zyxel
product: ZyWALL/USG series firmware
versions:
version: 4.25 through 4.73 Patch 1, status: affected
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
baseScore: 9.8
baseSeverity: CRITICAL
]