description: A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 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:
{
defaultStatus: unaffected
product: ATP series firmware
vendor: Zyxel
versions:
status: affected, version: 4.60 through 5.36 Patch 1
}
{
defaultStatus: unaffected
product: USG FLEX series firmware
vendor: Zyxel
versions:
status: affected, version: 4.60 through 5.36 Patch 1
}
{
defaultStatus: unaffected
product: USG FLEX 50(W) firmware
vendor: Zyxel
versions:
status: affected, version: 4.60 through 5.36 Patch 1
}
{
defaultStatus: unaffected
product: USG20(W)-VPN firmware
vendor: Zyxel
versions:
status: affected, version: 4.60 through 5.36 Patch 1
}
{
defaultStatus: unaffected
product: VPN series firmware
vendor: Zyxel
versions:
status: affected, version: 4.60 through 5.36 Patch 1
}
{
defaultStatus: unaffected
product: ZyWALL/USG series firmware
vendor: Zyxel
versions:
status: affected, version: 4.60 through 4.73 Patch 1
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9.8
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL