Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM : RPM Package Manager vulnerabilities (USN-5273-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5273-1. 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(183159);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");

  script_cve_id("CVE-2021-3421", "CVE-2021-20266", "CVE-2021-20271");
  script_xref(name:"USN", value:"5273-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM : RPM Package Manager vulnerabilities (USN-5273-1)");

  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 ESM / 18.04 ESM / 20.04 ESM host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-5273-1 advisory.

  - A flaw was found in RPM's hdrblobInit() in lib/header.c. This flaw allows an attacker who can modify the
    rpmdb to cause an out-of-bounds read. The highest threat from this vulnerability is to system
    availability. (CVE-2021-20266)

  - A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an
    attacker who can convince a victim to install a seemingly verifiable package, whose signature header was
    modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is
    to data integrity, confidentiality, and system availability. (CVE-2021-20271)

  - A flaw was found in the RPM package in the read functionality. This flaw allows an attacker who can
    convince a victim to install a seemingly verifiable package or compromise an RPM repository, to cause RPM
    database corruption. The highest threat from this vulnerability is to data integrity. This flaw affects
    RPM versions before 4.17.0-alpha. (CVE-2021-3421)

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-5273-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:N/UI:R/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-2021-20271");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/07/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:debugedit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpm-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpm3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpm8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpmbuild3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpmbuild8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpmio3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpmio8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpmsign3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:librpmsign8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rpm-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rpm-i18n");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rpm2cpio");
  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) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.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 pkgs = [
    {'osver': '16.04', 'pkgname': 'debugedit', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'librpm-dev', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'librpm3', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'librpmbuild3', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'librpmio3', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'librpmsign3', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'python-rpm', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'python3-rpm', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'rpm', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'rpm-common', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'rpm-i18n', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '16.04', 'pkgname': 'rpm2cpio', 'pkgver': '4.12.0.1+dfsg1-3ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'debugedit', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'librpm-dev', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'librpm8', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'librpmbuild8', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'librpmio8', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'librpmsign8', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'python-rpm', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'python3-rpm', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'rpm', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'rpm-common', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'rpm-i18n', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '18.04', 'pkgname': 'rpm2cpio', 'pkgver': '4.14.1+dfsg1-2ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'debugedit', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'librpm-dev', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'librpm8', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'librpmbuild8', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'librpmio8', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'librpmsign8', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'python-rpm', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'python3-rpm', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'rpm', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'rpm-common', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'rpm-i18n', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'rpm2cpio', 'pkgver': '4.14.2.1+dfsg1-1ubuntu0.1~esm1'}
];

var flag = 0;
foreach 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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'debugedit / librpm-dev / librpm3 / librpm8 / librpmbuild3 / etc');
}