Huawei EulerOS: Security Advisory for ntp (EulerOS-SA-2019-1557)

# Copyright (C) 2020 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (C) the respective author(s)
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.1.2.2019.1557");
  script_version("2020-01-23T12:14:39+0000");
  script_cve_id("CVE-2014-9296", "CVE-2015-1798", "CVE-2015-7705", "CVE-2015-7850", "CVE-2015-7853", "CVE-2015-7855", "CVE-2015-7871", "CVE-2015-7976", "CVE-2018-7185");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2020-01-23 12:14:39 +0000 (Thu, 23 Jan 2020)");
  script_tag(name:"creation_date", value:"2020-01-23 12:14:39 +0000 (Thu, 23 Jan 2020)");
  script_name("Huawei EulerOS: Security Advisory for ntp (EulerOS-SA-2019-1557)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("Huawei EulerOS Local Security Checks");
  script_dependencies("gb_huawei_euleros_consolidation.nasl");
  script_mandatory_keys("ssh/login/euleros", "ssh/login/rpms", re:"ssh/login/release=EULEROSVIRT-3\.0\.1\.0");

  script_xref(name:"EulerOS-SA", value:"2019-1557");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1557");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS
  'ntp' package(s) announced via the EulerOS-SA-2019-1557 advisory.");

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

  script_tag(name:"insight", value:"It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key.(CVE-2015-1798)

A missing return statement in the receive() function could potentially allow a remote attacker to bypass NTP's authentication mechanism.(CVE-2014-9296)

The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.(CVE-2015-7705)

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.(CVE-2015-7853)

Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.(CVE-2015-7871)

The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the ''other side'' of an interleaved association causing the victim ntpd to reset its association.(CVE-2018-7185)

The ntpq saveconfig command in NTP 4.1.2, 4.2.x before 4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not properly filter special characters, which allows attackers to cause unspecified impact via a crafted filename.(CVE-2015-7976)

ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to cause a denial of service (infinite loop or crash) by pointing the key file at the log file.(CVE-2015-7850)

The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.(CVE-2015-7855)");

  script_tag(name:"affected", value:"'ntp' package(s) on Huawei EulerOS Virtualization 3.0.1.0.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

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

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "EULEROSVIRT-3.0.1.0") {

  if(!isnull(res = isrpmvuln(pkg:"ntp", rpm:"ntp~4.2.6p5~28.h8", rls:"EULEROSVIRT-3.0.1.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"ntpdate", rpm:"ntpdate~4.2.6p5~28.h8", rls:"EULEROSVIRT-3.0.1.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"sntp", rpm:"sntp~4.2.6p5~28.h8", rls:"EULEROSVIRT-3.0.1.0"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if (__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);