description: An integer overflow vulnerability in the source code of the QuickSec IPSec toolkit used in the VPN feature of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions on an affected device by sending a crafted IKE packet.
problem types: CWE-190 Integer Overflow or Wraparound
affected:
{
defaultStatus: unaffected
product: ATP series firmware
vendor: Zyxel
versions:
status: affected, version: versions 4.32 through 5.37
}
{
defaultStatus: unaffected
product: USG FLEX series firmware
vendor: Zyxel
versions:
status: affected, version: versions 4.50 through 5.37
}
{
defaultStatus: unaffected
product: USG FLEX 50(W) series firmware
vendor: Zyxel
versions:
status: affected, version: versions 4.16 through 5.37
}
{
defaultStatus: unaffected
product: USG20(W)-VPN series firmware
vendor: Zyxel
versions:
status: affected, version: versions 4.16 through 5.37
}
{
defaultStatus: unaffected
product: VPN series firmware
vendor: Zyxel
versions:
status: affected, version: versions 4.30 through 5.37
}
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
]
format: CVSS
scenarios: GENERAL