CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
68.7%
The version of Apache APISIX installed on the remote host is prior to 2.10.2. It is, therefore, potentially affected by a security bypass vulnerability. The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions.
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(181928);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/28");
script_cve_id("CVE-2021-43557");
script_name(english:"Apache APISIX < 2.10.2 Security Bypass");
script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote host is missing a vendor-supplied update.");
script_set_attribute(attribute:"description", value:
"The version of Apache APISIX installed on the remote host is prior to 2.10.2. It is, therefore, potentially affected by
a security bypass vulnerability. The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without
verification. The $request_uri is the full original request URI without normalization. This makes it possible to
construct a URI to bypass the block list on some occasions.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h");
script_set_attribute(attribute:"solution", value:
"Upgrade to Apache APISIX version 2.10.2 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-43557");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/22");
script_set_attribute(attribute:"patch_publication_date", value:"2021/11/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/27");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:apisix");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Misc.");
script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("apache_apisix_http_detect.nbin");
script_require_keys("installed_sw/Apache APISIX");
exit(0);
}
include('http.inc');
include('vcf.inc');
var port = get_http_port(default:9080);
var app_info = vcf::get_app_info(app:'Apache APISIX', port:port, service:TRUE);
# Not able to check for mitigation
if (report_paranoia < 2)
audit(AUDIT_POTENTIAL_VULN);
var constraints = [
{'fixed_version': '2.10.2'}
];
vcf::check_version_and_report(
app_info:app_info,
constraints:constraints,
severity:SECURITY_WARNING
);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
68.7%