description:
A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration.
problem types: CWE-134 Use of Externally-Controlled Format String
affected:
{
defaultStatus: unaffected
product: ATP series firmware
vendor: Zyxel
versions:
status: affected, version: version 4.32 through 5.37 Patch 1
}
{
defaultStatus: unaffected
product: USG FLEX series firmware
vendor: Zyxel
versions:
status: affected, version: version 4.50 through 5.37 Patch 1
}
{
defaultStatus: unaffected
product: USG FLEX 50(W) series firmware
vendor: Zyxel
versions:
status: affected, version: version 4.16 through 5.37 Patch 1
}
{
defaultStatus: unaffected
product: USG20(W)-VPN series firmware
vendor: Zyxel
versions:
status: affected, version: version 4.16 through 5.37 Patch 1
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.1
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL