Amazon Linux 2 : libvirt (ALAS-2019-1361)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2019-1361.
#

include('compat.inc');

if (description)
{
  script_id(131029);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/02/21");

  script_cve_id("CVE-2019-3840");
  script_xref(name:"ALAS", value:"2019-1361");

  script_name(english:"Amazon Linux 2 : libvirt (ALAS-2019-1361)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"A NULL pointer dereference flaw was discovered in libvirt in the way
it gets interface information through the QEMU agent. An attacker in a
guest VM can use this flaw to crash libvirtd and cause a denial of
service. (CVE-2019-3840)");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/AL2/ALAS-2019-1361.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update libvirt' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3840");
  script_set_attribute(attribute:"cvss3_score_rationale", value:"Scoring adjustsed to align with CVSS 3.1 attack complexity guidance.");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-admin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-bash-completion");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-config-network");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-config-nwfilter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-interface");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-lxc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-network");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-nodedev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-nwfilter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-secret");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-disk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-logical");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-mpath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-scsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-lxc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-lock-sanlock");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-login-shell");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-nss");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

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


flag = 0;
if (rpm_check(release:"AL2", reference:"libvirt-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-admin-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-bash-completion-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-client-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-config-network-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-config-nwfilter-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-interface-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-lxc-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-network-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-nodedev-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-nwfilter-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-qemu-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-secret-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-core-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-disk-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-gluster-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-iscsi-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-logical-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-mpath-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-rbd-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-driver-storage-scsi-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-kvm-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-daemon-lxc-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-debuginfo-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-devel-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-docs-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-libs-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-lock-sanlock-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-login-shell-4.5.0-23.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"libvirt-nss-4.5.0-23.amzn2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libvirt / libvirt-admin / libvirt-bash-completion / libvirt-client / etc");
}