6.5
MEDIUM
CVE-2023-34140
Zyxel ATP/USG FLEX/NXC Lan-Based CAPWAP Daemon Buffer Overflow DoS
Description

A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.36 Patch 2, USG FLEX series firmware versions 4.50 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.16 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.16 through 5.36 Patch 2, VPN series firmware versions 4.30 through 5.36 Patch 2, NXC2500 firmware versions 6.10(AAIG.0) through 6.10(AAIG.3), and NXC5500 firmware versions 6.10(AAOS.0) through 6.10(AAOS.4), could allow an unauthenticated, LAN-based attacker to cause denial of service (DoS) conditions by sending a crafted request to the CAPWAP daemon.

INFO

Published Date :

July 17, 2023, 6:15 p.m.

Last Modified :

July 26, 2023, 9:29 p.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2023-34140 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Zyxel zywall_vpn_50_firmware
2 Zyxel zywall_vpn_100_firmware
3 Zyxel zywall_vpn_300_firmware
4 Zyxel usg_2200-vpn_firmware
5 Zyxel usg_20w-vpn_firmware
6 Zyxel usg_flex_100_firmware
7 Zyxel usg_flex_100w_firmware
8 Zyxel usg_flex_200_firmware
9 Zyxel usg_flex_50_firmware
10 Zyxel usg_flex_500_firmware
11 Zyxel usg_flex_50w_firmware
12 Zyxel usg_flex_700_firmware
13 Zyxel zywall_vpn100_firmware
14 Zyxel zywall_vpn2s_firmware
15 Zyxel zywall_vpn300_firmware
16 Zyxel zywall_vpn50_firmware
17 Zyxel zywall_atp100_firmware
18 Zyxel zywall_atp100w_firmware
19 Zyxel zywall_atp200_firmware
20 Zyxel zywall_atp500_firmware
21 Zyxel zywall_atp700_firmware
22 Zyxel zywall_atp800_firmware
23 Zyxel nxc2500_firmware
24 Zyxel nxc5500_firmware
25 Zyxel vpn100_firmware
26 Zyxel atp100_firmware
: Total Affected Vendor : 1 | Products : 26
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-34140.

URL Resource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-34140 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-34140 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jul. 26, 2023

    Action Type Old Value New Value
    Changed Reference Type https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers No Types Assigned https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers Vendor Advisory
    Added CWE NIST CWE-120
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:* versions from (including) 4.16 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_2200-vpn_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_2200-vpn:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_atp100_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_atp100:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_atp100w_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_atp100w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_atp200_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_atp200:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_atp500_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_atp500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_atp700_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_atp700:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_atp800_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_atp800:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn100:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn2s_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn2s:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn300:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn50_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn50:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn_100_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn_100:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn_300_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn_300:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:zywall_vpn_50_firmware:*:*:*:*:*:*:*:* versions from (including) 4.30 up to (excluding) 5.37 OR cpe:2.3:h:zyxel:zywall_vpn_50:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:nxc2500_firmware:*:*:*:*:*:*:*:* versions from (including) 6.10\(aaig.0\) up to (including) 6.10\(aaig.3\) OR cpe:2.3:h:zyxel:nxc2500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:zyxel:nxc5500_firmware:*:*:*:*:*:*:*:* versions from (including) 6.10\(aaos.0\) up to (including) 6.10\(aaos.4\) OR cpe:2.3:h:zyxel:nxc5500:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-34140 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-34140 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.04 }} 0.00%

score

0.10628

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: