Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : YARA vulnerabilities (USN-8080-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8080-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(301679);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/10");

  script_cve_id(
    "CVE-2016-10211",
    "CVE-2017-5923",
    "CVE-2017-5924",
    "CVE-2017-8294",
    "CVE-2017-8929",
    "CVE-2017-9304",
    "CVE-2017-9438",
    "CVE-2017-9465",
    "CVE-2017-11328",
    "CVE-2018-12034",
    "CVE-2018-12035",
    "CVE-2018-19974",
    "CVE-2018-19975",
    "CVE-2018-19976",
    "CVE-2019-19648",
    "CVE-2021-3402",
    "CVE-2021-45429"
  );
  script_xref(name:"USN", value:"8080-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : YARA vulnerabilities (USN-8080-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-8080-1 advisory.

    Kamil Frankowicz discovered that a number of YARA's functions generated memory exceptions when processing
    specially crafted rules or files. A remote attacker could possibly use these issues to cause YARA to
    crash, resulting in a denial of service. These issues only affected Ubuntu 16.04 LTS. (CVE-2016-10211,
    CVE-2017-5923, CVE-2017-5924, CVE-2017-8294, CVE-2017-8929, CVE-2017-9304, CVE-2017-9438, CVE-2017-9465)

    Jurriaan Bremer discovered that YARA's yr_object_array_set_limit() function could result in a heap buffer
    overflow when scanning specially crafted .NET files. A remote attacker could possibly use this issue to
    cause YARA to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS.
    (CVE-2017-11328)

    It was discovered that YARA's yr_execute_code() function could cause an out-of-bounds read or write when
    parsing specially crafted compiled rule files. A remote attacker could possibly use these issues to cause
    YARA to crash, resulting in a denial of service. These issues only affected Ubuntu 16.04 LTS and Ubuntu
    18.04 LTS. (CVE-2018-12034, CVE-2018-12035)

    It was discovered that YARA's virtual machine could be escaped in certain instances. A remote attacker
    could possibly use these issues to execute arbitrary code. These issues only affected Ubuntu 16.04 LTS and
    Ubuntu 18.04 LTS. (CVE-2018-19974, CVE-2018-19975, CVE-2018-19976)

    It was discovered that YARA's macho_parse_file() function would generate an out-of-bounds memory access
    error when parsing a specially crafted Mach-O file. A remote attacker could possibly use this issue to
    cause YARA to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected
    Ubuntu 20.04 LTS. (CVE-2019-19648)

    It was discovered that YARA's macho.c implementation contained several overflow reads, which could be
    triggered when parsing specially crafted Mach-O files. A remote attacker could possibly use this issue to
    cause YARA to crash, resulting in a denial of service, or to learn sensitive information. This issue only
    affected Ubuntu 20.04 LTS. (CVE-2021-3402)

    It was discovered that YARA's yr_set_configuration() function could trigger a buffer overflow when parsing
    specially crafted rules. A remote attacker could possibly use this issue to cause YARA to crash, resulting
    in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-45429)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-8080-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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-2018-19975");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-3402");

  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:"2017/04/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libyara-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libyara3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-yara");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-yara");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:yara");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '16.04', 'pkgname': 'libyara-dev', 'pkgver': '3.4.0+dfsg-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2017-11328', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976']},
    {'osver': '16.04', 'pkgname': 'libyara3', 'pkgver': '3.4.0+dfsg-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2017-11328', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976']},
    {'osver': '16.04', 'pkgname': 'python-yara', 'pkgver': '3.4.0+dfsg-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2017-11328', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976']},
    {'osver': '16.04', 'pkgname': 'python3-yara', 'pkgver': '3.4.0+dfsg-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2017-11328', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976']},
    {'osver': '16.04', 'pkgname': 'yara', 'pkgver': '3.4.0+dfsg-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2017-11328', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976']},
    {'osver': '18.04', 'pkgname': 'libyara-dev', 'pkgver': '3.7.1-1ubuntu2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976', 'CVE-2021-45429']},
    {'osver': '18.04', 'pkgname': 'libyara3', 'pkgver': '3.7.1-1ubuntu2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976', 'CVE-2021-45429']},
    {'osver': '18.04', 'pkgname': 'yara', 'pkgver': '3.7.1-1ubuntu2+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976', 'CVE-2021-45429']},
    {'osver': '20.04', 'pkgname': 'libyara-dev', 'pkgver': '3.9.0-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976', 'CVE-2019-19648', 'CVE-2021-3402', 'CVE-2021-45429']},
    {'osver': '20.04', 'pkgname': 'libyara3', 'pkgver': '3.9.0-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976', 'CVE-2019-19648', 'CVE-2021-3402', 'CVE-2021-45429']},
    {'osver': '20.04', 'pkgname': 'yara', 'pkgver': '3.9.0-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2016-10211', 'CVE-2017-5923', 'CVE-2017-5924', 'CVE-2017-8294', 'CVE-2017-8929', 'CVE-2017-9304', 'CVE-2017-9438', 'CVE-2017-9465', 'CVE-2018-12034', 'CVE-2018-12035', 'CVE-2018-19974', 'CVE-2018-19975', 'CVE-2018-19976', 'CVE-2019-19648', 'CVE-2021-3402', 'CVE-2021-45429']}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) {
        flag++;
        if (!ubuntu_pro_detected && !pro_caveat_needed) pro_caveat_needed = pro_required;
    }
  }
}

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libyara-dev / libyara3 / python-yara / python3-yara / yara');
}