Huawei EulerOS: Security Advisory for bind (EulerOS-SA-2020-1203)

# 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("1.3.6.1.4.1.25623.1.1.2.2020.1203");
  script_version("2020-03-13T07:13:57+0000");
  script_cve_id("CVE-2016-6170", "CVE-2018-5741", "CVE-2018-5745", "CVE-2019-6465");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2020-03-13 07:13:57 +0000 (Fri, 13 Mar 2020)");
  script_tag(name:"creation_date", value:"2020-03-13 07:13:57 +0000 (Fri, 13 Mar 2020)");
  script_name("Huawei EulerOS: Security Advisory for bind (EulerOS-SA-2020-1203)");
  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=EULEROSVIRTARM64-3\.0\.2\.0");

  script_xref(name:"EulerOS-SA", value:"2020-1203");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-1203");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS
  'bind' package(s) announced via the EulerOS-SA-2020-1203 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 bind does not implement reasonable restrictions for zone sizes. This allows an explicitly configured primary DNS server for a zone to crash a secondary DNS server, affecting service of other zones hosted on the same secondary server.(CVE-2016-6170)

Controls for zone transfers may not be properly applied to Dynamically Loadable Zones (DLZs) if the zones are writable Versions affected: BIND 9.9.0 - 9.10.8-P1, 9.11.0 - 9.11.5-P2, 9.12.0 - 9.12.3-P2, and versions 9.9.3-S1 - 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 - 9.13.6 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2019-6465.(CVE-2019-6465)

To provide fine-grained controls over the ability to use Dynamic DNS (DDNS) to update records in a zone, BIND 9 provides a feature called update-policy. Various rules can be configured to limit the types of updates that can be performed by a client, depending on the key used when sending the update request. Unfortunately, some rule types were not initially documented, and when documentation for them was added to the Administrator Reference Manual (ARM) in change #3112, the language that was added to the ARM at that time incorrectly described the behavior of two rule types, krb5-subdomain and ms-subdomain. This incorrect documentation could mislead operators into believing that policies they had configured were more restrictive than they actually were. This affects BIND versions prior to BIND 9.11.5 and BIND 9.12.3.(CVE-2018-5741)

'managed-keys' is a feature which allows a BIND resolver to automatically maintain the keys used by trust anchors which operators configure for use in DNSSEC validation. Due to an error in the managed-keys feature it is possible for a BIND server which uses managed-keys to exit due to an assertion failure if, during key rollover, a trust anchor's keys are replaced with keys which use an unsupported algorithm. Versions affected: BIND 9.9.0 - 9.10.8-P1, 9.11.0 - 9.11.5-P1, 9.12.0 - 9.12.3-P1, and versions 9.9.3-S1 - 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 - 9.13.6 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5745.(CVE-2018-5745)");

  script_tag(name:"affected", value:"'bind' package(s) on Huawei EulerOS Virtualization for ARM 64 3.0.2.0.");

  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 == "EULEROSVIRTARM64-3.0.2.0") {

  if(!isnull(res = isrpmvuln(pkg:"bind-libs", rpm:"bind-libs~9.9.4~61.1.h10", rls:"EULEROSVIRTARM64-3.0.2.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"bind-libs-lite", rpm:"bind-libs-lite~9.9.4~61.1.h10", rls:"EULEROSVIRTARM64-3.0.2.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"bind-license", rpm:"bind-license~9.9.4~61.1.h10", rls:"EULEROSVIRTARM64-3.0.2.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"bind-utils", rpm:"bind-utils~9.9.4~61.1.h10", rls:"EULEROSVIRTARM64-3.0.2.0"))) {
    report += res;
  }

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

exit(0);