SUSE SLED15 / SLES15 Security Update : dnsmasq (SUSE-SU-2021:0163-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2021:0163-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(145108);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id(
    "CVE-2020-25681",
    "CVE-2020-25682",
    "CVE-2020-25683",
    "CVE-2020-25684",
    "CVE-2020-25685",
    "CVE-2020-25686",
    "CVE-2020-25687"
  );
  script_xref(name:"CEA-ID", value:"CEA-2021-0003");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : dnsmasq (SUSE-SU-2021:0163-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"This update for dnsmasq fixes the following issues :

bsc#1177077: Fixed DNSpooq vulnerabilities

CVE-2020-25684, CVE-2020-25685, CVE-2020-25686: Fixed multiple Cache
Poisoning attacks.

CVE-2020-25681, CVE-2020-25682, CVE-2020-25683, CVE-2020-25687: Fixed
multiple potential Heap-based overflows when DNSSEC is enabled.

Retry query to other servers on receipt of SERVFAIL rcode
(bsc#1176076)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1176076");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1177077");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25681/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25682/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25683/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25684/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25685/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25686/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-25687/");
  # https://www.suse.com/support/update/announcement/2021/suse-su-20210163-1
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f0170268");
  script_set_attribute(attribute:"solution", value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-163=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2021-163=1");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25682");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/01/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/01/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/01/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dnsmasq");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dnsmasq-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dnsmasq-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(1|2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP1/2", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(1|2)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP1/2", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"1", reference:"dnsmasq-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"dnsmasq-debuginfo-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"dnsmasq-debugsource-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"dnsmasq-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"dnsmasq-debuginfo-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"dnsmasq-debugsource-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"dnsmasq-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"dnsmasq-debuginfo-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"dnsmasq-debugsource-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"dnsmasq-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"dnsmasq-debuginfo-2.78-7.6.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"dnsmasq-debugsource-2.78-7.6.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "dnsmasq");
}