Lucene search

K
openvasCopyright (C) 2019 Greenbone AGOPENVAS:1361412562310142856
HistorySep 06, 2019 - 12:00 a.m.

Asterisk T.38 DoS Vulnerability (AST-2019-004)

2019-09-0600:00:00
Copyright (C) 2019 Greenbone AG
plugins.openvas.org
78

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

6.3 Medium

AI Score

Confidence

High

4 Medium

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.006 Low

EPSS

Percentile

79.2%

Asterisk is prone to a denial of service vulnerability when
negotiating for T.38 with a declined stream.

# SPDX-FileCopyrightText: 2019 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("1.3.6.1.4.1.25623.1.0.142856");
  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:"2019-09-06 05:00:46 +0000 (Fri, 06 Sep 2019)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-03-05 18:15:00 +0000 (Fri, 05 Mar 2021)");

  script_cve_id("CVE-2019-15297");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Asterisk T.38 DoS Vulnerability (AST-2019-004)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 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 when
  negotiating for T.38 with a declined stream.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"When Asterisk sends a re-invite initiating T.38 faxing, and the
  endpoint responds with a declined media stream a crash will then occur in Asterisk.");

  script_tag(name:"affected", value:"Asterisk Open Source 15.x and 16.x.");

  script_tag(name:"solution", value:"Update to version 15.7.4, 16.5.1 or later.");

  script_xref(name:"URL", value:"https://downloads.asterisk.org/pub/security/AST-2019-004.html");

  exit(0);
}

include("host_details.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 =~ "^15\.") {
  if (version_is_less(version: version, test_version: "15.7.4")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.7.4");
    security_message(port: port, data: report, proto: "udp");
    exit(0);
  }
}

if (version =~ "^16\.") {
  if (version_is_less(version: version, test_version: "16.5.1")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "16.5.1");
    security_message(port: port, data: report, proto: "udp");
    exit(0);
  }
}

exit(0);

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

6.3 Medium

AI Score

Confidence

High

4 Medium

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.006 Low

EPSS

Percentile

79.2%