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nessusThis script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.OPENSUSE-2021-2685.NASL
HistoryAug 14, 2021 - 12:00 a.m.

openSUSE 15 Security Update : libdnf (openSUSE-SU-2021:2685-1)

2021-08-1400:00:00
This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
65

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:2685-1 advisory.

  • 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)

  • A flaw was found in libdnf’s signature verification functionality in versions before 0.60.1. This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it. The highest risk of this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3445)

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# openSUSE Security Update openSUSE-SU-2021:2685-1. The text itself
# is copyright (C) SUSE.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(152562);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/25");

  script_cve_id("CVE-2021-3421", "CVE-2021-3445", "CVE-2021-20271");

  script_name(english:"openSUSE 15 Security Update : libdnf (openSUSE-SU-2021:2685-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in
the openSUSE-SU-2021:2685-1 advisory.

  - 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)

  - A flaw was found in libdnf's signature verification functionality in versions before 0.60.1. This flaw
    allows an attacker to achieve code execution if they can alter the header information of an RPM package
    and then trick a user or system into installing it. The highest risk of this vulnerability is to
    confidentiality, integrity, as well as system availability. (CVE-2021-3445)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1183779");
  # https://lists.opensuse.org/archives/list/[email protected]/thread/PUJW4L55UGKEL4ROYV7WZNQDNBJXXLLG/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4fbf0c45");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-20271");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3421");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3445");
  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:N/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-2021-3445");

  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:"2021/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:hawkey-man");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libdnf-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libdnf-repo-config-zypp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libdnf2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-hawkey");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-libdnf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.3");
  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('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/SuSE/release');
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, 'openSUSE');
var os_ver = pregmatch(pattern: "^SUSE([\d.]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'openSUSE');
os_ver = os_ver[1];
if (release !~ "^(SUSE15\.3)$") audit(AUDIT_OS_RELEASE_NOT, 'openSUSE', '15.3', release);
if (!get_kb_item("Host/SuSE/rpm-list")) 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, 'openSUSE ' + os_ver, cpu);

var pkgs = [
    {'reference':'hawkey-man-0.62.0-5.3.1', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libdnf-devel-0.62.0-5.3.1', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libdnf-repo-config-zypp-0.62.0-5.3.1', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libdnf2-0.62.0-5.3.1', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python3-hawkey-0.62.0-5.3.1', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python3-libdnf-0.62.0-5.3.1', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var cpu = NULL;
  var rpm_spec_vers_cmp = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (reference && release) {
    if (rpm_check(release:release, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'hawkey-man / libdnf-devel / libdnf-repo-config-zypp / libdnf2 / etc');
}