CVE-2023-6764
Zyxel IPSec VPN Format String Remote Code Execution
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.
INFO
Published Date :
Feb. 20, 2024, 3:15 a.m.
Last Modified :
Jan. 21, 2025, 6:35 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.2
Affected Products
The following products are affected by CVE-2023-6764
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.
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-2023-6764.
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-2023-6764 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-6764 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.
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Initial Analysis by [email protected]
Jan. 21, 2025
Action Type Old Value New Value Added CWE NIST CWE-134 Added CPE Configuration AND OR *cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 *cpe:2.3:o:zyxel:atp100_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:atp100_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 *cpe:2.3:o:zyxel:atp100w_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:atp100w_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:atp100w:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 *cpe:2.3:o:zyxel:atp200_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:atp200_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 *cpe:2.3:o:zyxel:atp500_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:atp500_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 *cpe:2.3:o:zyxel:atp700_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:atp700_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:atp700:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:* versions from (including) 4.32 up to (excluding) 5.37 *cpe:2.3:o:zyxel:atp800_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:atp800_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:* versions from (including) 4.16 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg20-vpn_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg20-vpn_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:* versions from (including) 4.16 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg20w-vpn_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg20w-vpn_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg20w-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 *cpe:2.3:o:zyxel:usg_flex_100_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_100_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_100ax_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_100ax_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_100ax_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_100ax:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_100h_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_100h_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_100h_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_100h:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.37:patch1:*:*:*:*:*:* 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 *cpe:2.3:o:zyxel:usg_flex_200_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_200_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_200h_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_200h_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_200h_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_200h:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_200hp_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_200hp_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_200hp_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_200hp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_500_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_500_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_500h_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_500h_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_500h_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_500h:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:* versions from (including) 4.16 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_50_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_50_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:* versions from (including) 4.16 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.37:patch1:*:*:*:*:*:* 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 *cpe:2.3:o:zyxel:usg_flex_700_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_700_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:usg_flex_700h_firmware:*:*:*:*:*:*:*:* versions from (including) 4.50 up to (excluding) 5.37 *cpe:2.3:o:zyxel:usg_flex_700h_firmware:5.37:-:*:*:*:*:*:* *cpe:2.3:o:zyxel:usg_flex_700h_firmware:5.37:patch1:*:*:*:*:*:* OR cpe:2.3:h:zyxel:usg_flex_700h:-:*:*:*:*:*:*:* Changed Reference Type https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 No Types Assigned https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 Vendor Advisory Changed Reference Type https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 No Types Assigned https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Received by [email protected]
Feb. 20, 2024
Action Type Old Value New Value Added 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. Added Reference Zyxel Corporation https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 [No types assigned] Added CWE Zyxel Corporation CWE-134 Added CVSS V3.1 Zyxel Corporation AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-6764 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-2023-6764
weaknesses.