7.5

CVE-2023-4398

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.

Data is provided by the National Vulnerability Database (NVD)
Zyxel ≫ Zld Version >= 4.32 <= 5.37
   Zyxel ≫ Atp100 Version-
   Zyxel ≫ Atp100w Version-
   Zyxel ≫ Atp200 Version-
   Zyxel ≫ Atp500 Version-
   Zyxel ≫ Atp700 Version-
   Zyxel ≫ Atp800 Version-
Zyxel ≫ Zld Version >= 4.50 <= 5.37
   Zyxel ≫ Usg Flex 100 Version-
   Zyxel ≫ Usg Flex 100w Version-
   Zyxel ≫ Usg Flex 200 Version-
   Zyxel ≫ Usg Flex 50 Version-
   Zyxel ≫ Usg Flex 500 Version-
   Zyxel ≫ Usg Flex 50w Version-
   Zyxel ≫ Usg Flex 700 Version-
Zyxel ≫ Zld Version >= 4.16 <= 5.37
   Zyxel ≫ Usg 20w-vpn Version-
   Zyxel ≫ Vpn50w Version-
Zyxel ≫ Zld Version >= 4.30 <= 5.37
   Zyxel ≫ Vpn100 Version-
   Zyxel ≫ Vpn1000 Version-
   Zyxel ≫ Vpn300 Version-
   Zyxel ≫ Vpn50 Version-
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.19% 0.418
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
security@zyxel.com.tw 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.