5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4 High
AI Score
Confidence
High
0.693 Medium
EPSS
Percentile
98.0%
Asterisk is prone to a denial of service vulnerability.
# SPDX-FileCopyrightText: 2017 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-only
CPE = "cpe:/a:digium:asterisk";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.140577");
script_version("2023-12-19T05:05:25+0000");
script_tag(name:"last_modification", value:"2023-12-19 05:05:25 +0000 (Tue, 19 Dec 2023)");
script_tag(name:"creation_date", value:"2017-12-05 09:31:51 +0700 (Tue, 05 Dec 2017)");
script_tag(name:"cvss_base", value:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
script_cve_id("CVE-2017-17090");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Asterisk DoS Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2017 Greenbone AG");
script_family("Denial of Service");
script_dependencies("gb_digium_asterisk_sip_detect.nasl");
script_mandatory_keys("digium/asterisk/detected");
script_tag(name:"summary", value:"Asterisk is prone to a denial of service vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"If the chan_skinny (AKA SCCP protocol) channel driver is flooded
with certain requests it can cause the asterisk process to use excessive amounts of virtual memory
eventually causing asterisk to stop processing requests of any kind.");
script_tag(name:"affected", value:"Asterisk Open Source 13.x, 14.x, 15.x and Certified Asterisk
13.13.");
script_tag(name:"solution", value:"Update to version 13.18.3, 14.7.3, 15.1.3, 13.13-cert8 or
later.");
script_xref(name:"URL", value:"http://downloads.asterisk.org/pub/security/AST-2017-013.html");
exit(0);
}
include("host_details.inc");
include("revisions-lib.inc");
include("version_func.inc");
if (!port = get_app_port(cpe: CPE))
exit(0);
if (!version = get_app_version(cpe: CPE, port: port))
exit(0);
if (version =~ "^13\.") {
if (version =~ "^13\.13cert") {
if (revcomp(a: version, b: "13.13cert8") < 0) {
report = report_fixed_ver(installed_version: version, fixed_version: "13.13-cert8");
security_message(port: port, data: report, proto: "udp");
exit(0);
}
}
else {
if (version_is_less(version: version, test_version: "13.18.3")) {
report = report_fixed_ver(installed_version: version, fixed_version: "13.18.3");
security_message(port: port, data: report, proto: "udp");
exit(0);
}
}
}
if (version =~ "^14\.") {
if (version_is_less(version: version, test_version: "14.7.3")) {
report = report_fixed_ver(installed_version: version, fixed_version: "14.7.3");
security_message(port: port, data: report, proto: "udp");
exit(0);
}
}
if (version =~ "^15\.") {
if (version_is_less(version: version, test_version: "15.1.3")) {
report = report_fixed_ver(installed_version: version, fixed_version: "15.1.3");
security_message(port: port, data: report, proto: "udp");
exit(0);
}
}
exit(0);
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4 High
AI Score
Confidence
High
0.693 Medium
EPSS
Percentile
98.0%