4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9 Medium
AI Score
Confidence
High
0.004 Low
EPSS
Percentile
72.1%
A vulnerability in Session Initiation Protocol (SIP) call handling of
Cisco IP Phone 8800 Series devices could allow an unauthenticated, remote attacker to cause a denial of service
(DoS) condition due to the SIP process unexpectedly restarting. All active phone calls are dropped as the SIP
process restarts.
# 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
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.106860");
script_version("2023-07-25T05:05:58+0000");
script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
script_tag(name:"creation_date", value:"2017-06-08 13:49:55 +0700 (Thu, 08 Jun 2017)");
script_tag(name:"cvss_base", value:"4.3");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/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:"2017-07-08 01:29:00 +0000 (Sat, 08 Jul 2017)");
script_cve_id("CVE-2017-6656");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Cisco IP Phone 8800 Series SIP Denial of Service Vulnerability");
script_category(ACT_GATHER_INFO);
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_copyright("Copyright (C) 2017 Greenbone AG");
script_family("CISCO");
script_dependencies("gb_cisco_ip_phone_detect.nasl");
script_mandatory_keys("cisco/ip_phone/model");
script_tag(name:"summary", value:"A vulnerability in Session Initiation Protocol (SIP) call handling of
Cisco IP Phone 8800 Series devices could allow an unauthenticated, remote attacker to cause a denial of service
(DoS) condition due to the SIP process unexpectedly restarting. All active phone calls are dropped as the SIP
process restarts.");
script_tag(name:"insight", value:"The vulnerability is due to incomplete input validation of the SIP packet
header. An attacker could exploit this vulnerability by sending a malformed SIP packet to a targeted phone.");
script_tag(name:"impact", value:"An exploit could allow the attacker to cause a DoS condition when all phone
calls are dropped, due to the SIP process unexpectedly restarting.");
script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");
script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-sip");
exit(0);
}
include("version_func.inc");
if (!model = get_kb_item("cisco/ip_phone/model"))
exit(0);
if (model =~ "^CP-88..") {
if (!version = get_kb_item("cisco/ip_phone/version"))
exit(0);
version = eregmatch(pattern: "sip88xx\.([0-9-]+)", string: version);
if (version[1] && version[1] =~ "^11-0-0-1") {
report = report_fixed_ver(installed_version: version[1], fixed_version: "See advisory");
security_message(port: 0, data: report);
}
}
exit(0);
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9 Medium
AI Score
Confidence
High
0.004 Low
EPSS
Percentile
72.1%