CVE-2023-35136 : An improper input validation vulnerability in the “Quagga” package of the Zy

An improper input validation vulnerability in the “Quagga” package 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 authenticated local attacker to access configuration files on an affected device.

Published 2023-11-28 02:15:42

Updated 2023-12-04 18:09:38

Source Zyxel Corporation

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2023-35136

Zyxel » ZLD
Versions from including (>=) 4.50 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 100 » Version: N/A
When used together with: Zyxel » Usg Flex 100w » Version: N/A
When used together with: Zyxel » Usg Flex 200 » Version: N/A
When used together with: Zyxel » Usg Flex 50 » Version: N/A
When used together with: Zyxel » Usg Flex 500 » Version: N/A
When used together with: Zyxel » Usg Flex 50w » Version: N/A
When used together with: Zyxel » Usg Flex 700 » Version: N/A
Zyxel » ZLD
Versions from including (>=) 4.16 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg 20w-vpn » Version: N/A
When used together with: Zyxel » Vpn50w » Version: N/A
Zyxel » ZLD
Versions from including (>=) 4.32 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp100 » Version: N/A
When used together with: Zyxel » Atp100w » Version: N/A
When used together with: Zyxel » Atp200 » Version: N/A
When used together with: Zyxel » Atp500 » Version: N/A
When used together with: Zyxel » Atp700 » Version: N/A
When used together with: Zyxel » Atp800 » Version: N/A
Zyxel » ZLD
Versions from including (>=) 4.30 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Vpn100 » Version: N/A
When used together with: Zyxel » Vpn1000 » Version: N/A
When used together with: Zyxel » Vpn300 » Version: N/A
When used together with: Zyxel » Vpn50 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2023-35136

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-35136

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	1.8	3.6	Zyxel Corporation
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2023-35136

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: security@zyxel.com.tw (Primary)

References for CVE-2023-35136

https://https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps

Zyxel security advisory for multiple vulnerabilities in firewalls and APs | Zyxel Networks
Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2023-35136

Products affected by CVE-2023-35136

Exploit prediction scoring system (EPSS) score for CVE-2023-35136

CVSS scores for CVE-2023-35136

CWE ids for CVE-2023-35136

References for CVE-2023-35136