9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.2 Medium
AI Score
Confidence
High
0.163 Low
EPSS
Percentile
96.0%
Multiple Zyxel devices are prone to multiple
vulnerabilities.
# SPDX-FileCopyrightText: 2022 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
include("plugin_feed_info.inc");
CPE_PREFIX = "cpe:/o:zyxel:";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.149030");
script_version("2024-07-03T06:48:05+0000");
script_tag(name:"last_modification", value:"2024-07-03 06:48:05 +0000 (Wed, 03 Jul 2024)");
script_tag(name:"creation_date", value:"2022-12-19 06:33:38 +0000 (Mon, 19 Dec 2022)");
script_tag(name:"cvss_base", value:"10.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2023-05-08 18:15:00 +0000 (Mon, 08 May 2023)");
script_cve_id("CVE-2022-45440", "CVE-2023-28769", "CVE-2023-28770");
script_tag(name:"qod_type", value:"exploit");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Zyxel Devices Multiple Vulnerabilities (Dec 2022) - Active Check");
script_category(ACT_ATTACK);
script_copyright("Copyright (C) 2022 Greenbone AG");
script_family("Web application abuses");
script_dependencies("gb_zyxel_router_http_detect.nasl");
if(FEED_NAME == "GSF" || FEED_NAME == "GEF" || FEED_NAME == "SCM")
script_dependencies("gsf/gb_zyxel_vpn_firewall_consolidation.nasl");
script_mandatory_keys("zyxel/device/http/detected");
script_require_ports("Services/www", 80);
script_tag(name:"summary", value:"Multiple Zyxel devices are prone to multiple
vulnerabilities.");
script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET requests and checks the response.");
script_tag(name:"insight", value:"The following vulnerabilities exist:
- CVE-2023-28769: Multiple unauthenticated buffer overflows in zhttpd and libclinkc.so
- CVE-2023-28770: Unauthenticated local file disclosure (LFI) in zhttpd
- No CVE: Unsafe storage of sensitive data
- No CVE: Authenticated command injection
- No CVE: Broken access control
- CVE-2022-45440: Processing of symbolic links in ftpd
- No CVE: Inadequate CSRF implementation
- No CVE: Stored cross-site scripting (XSS)");
script_tag(name:"affected", value:"Multiple Zyxel devices are affected.");
script_tag(name:"solution", value:"See the referenced advisories.
Note: Some devices are End of Live (EoL) and will not receive any fix.");
script_xref(name:"URL", value:"https://sec-consult.com/vulnerability-lab/advisory/multiple-critical-vulnerabilities-in-multiple-zyxel-devices/");
script_xref(name:"URL", value:"https://sec-consult.com/blog/detail/enemy-within-unauthenticated-buffer-overflows-zyxel-routers/");
script_xref(name:"URL", value:"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities");
exit(0);
}
include("host_details.inc");
include("http_func.inc");
include("http_keepalive.inc");
include("misc_func.inc");
include("os_func.inc");
if (!infos = get_app_port_from_cpe_prefix(cpe: CPE_PREFIX, service: "www"))
exit(0);
cpe = infos["cpe"];
port = infos["port"];
if (!dir = get_app_location(cpe: cpe, port: port))
exit(0);
if (dir == "/")
dir = "";
files = traversal_files("linux");
foreach pattern (keys(files)) {
url = dir + "/Export_Log?/" + files[pattern];
if (http_vuln_check(port: port, url: url, pattern: pattern)) {
report = http_report_vuln_url(port: port, url: url);
security_message(port: port, data: report);
exit(0);
}
}
exit(0);
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.2 Medium
AI Score
Confidence
High
0.163 Low
EPSS
Percentile
96.0%