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nessusThis script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.SUSE_SU-2024-1923-1.NASL
HistoryJun 05, 2024 - 12:00 a.m.

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : unbound (SUSE-SU-2024:1923-1)

2024-06-0500:00:00
This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
4
suse linux
sled15
sles15
opensuse 15
unbound
security update
vulnerabilities
dns over https
cve-2023-50387
cve-2023-50868
cve-2022-30698
cve-2022-30699
cve-2022-3204
package update
security advisory

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.7

Confidence

Low

EPSS

0.05

Percentile

92.9%

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1923-1 advisory.

unbound was updated to 1.20.0:

* A lot of bugfixes and added features.
  For a complete list take a look at the changelog located at:
  /usr/share/doc/packages/unbound/Changelog or       https://www.nlnetlabs.nl/projects/unbound/download/

Some Noteworthy Changes:

* Removed DLV. The DLV has been decommisioned since unbound       1.5.4 and has been advised to stop using it since. The use of       dlv options displays a warning.
* Remove EDNS lame procedure, do not re-query without EDNS after       timeout.
* Add DNS over HTTPS
* libunbound has been upgraded to major version 8

Security Fixes:
* CVE-2023-50387: DNSSEC verification complexity can be       exploited to exhaust CPU resources and stall DNS resolvers.  [bsc#1219823]
* CVE-2023-50868: NSEC3 closest encloser proof can exhaust CPU.
  [bsc#1219826]
* CVE-2022-30698: Novel 'ghost domain names' attack by       introducing subdomain delegations.  [bsc#1202033]
* CVE-2022-30699: Novel 'ghost domain names' attack by       updating almost expired delegation information.  [bsc#1202031]
* CVE-2022-3204: NRDelegation attack leads to uncontrolled       resource consumption (Non-Responsive Delegation Attack).  [bsc#1203643]

Packaging Changes:

* Use prefixes instead of sudo in unbound.service
* Remove no longer necessary BuildRequires: libfstrm-devel and       libprotobuf-c-devel

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

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

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2024:1923-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(200108);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/05");

  script_cve_id(
    "CVE-2022-3204",
    "CVE-2022-30698",
    "CVE-2022-30699",
    "CVE-2023-50387",
    "CVE-2023-50868"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2024:1923-1");

  script_name(english:"SUSE SLED15 / SLES15 / openSUSE 15 Security Update : unbound (SUSE-SU-2024:1923-1)");

  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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are
affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1923-1 advisory.

    unbound was updated to 1.20.0:

    * A lot of bugfixes and added features.
      For a complete list take a look at the changelog located at:
      /usr/share/doc/packages/unbound/Changelog or
      https://www.nlnetlabs.nl/projects/unbound/download/

    Some Noteworthy Changes:

    * Removed DLV. The DLV has been decommisioned since unbound
      1.5.4 and has been advised to stop using it since. The use of
      dlv options displays a warning.
    * Remove EDNS lame procedure, do not re-query without EDNS after
      timeout.
    * Add DNS over HTTPS
    * libunbound has been upgraded to major version 8

    Security Fixes:
    * CVE-2023-50387: DNSSEC verification complexity can be
      exploited to exhaust CPU resources and stall DNS resolvers.  [bsc#1219823]
    * CVE-2023-50868: NSEC3 closest encloser proof can exhaust CPU.
      [bsc#1219826]
    * CVE-2022-30698: Novel 'ghost domain names' attack by
      introducing subdomain delegations.  [bsc#1202033]
    * CVE-2022-30699: Novel 'ghost domain names' attack by
      updating almost expired delegation information.  [bsc#1202031]
    * CVE-2022-3204: NRDelegation attack leads to uncontrolled
      resource consumption (Non-Responsive Delegation Attack).  [bsc#1203643]

    Packaging Changes:

    * Use prefixes instead of sudo in unbound.service
    * Remove no longer necessary BuildRequires: libfstrm-devel and
      libprotobuf-c-devel

Tenable has extracted the preceding description block directly from the SUSE 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://bugzilla.suse.com/1202031");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1202033");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1203643");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1219823");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1219826");
  # https://lists.suse.com/pipermail/sle-security-updates/2024-June/018654.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a4517447");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-30698");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-30699");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-3204");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-50387");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-50868");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-30699");

  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:"2022/08/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/06/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libunbound8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:unbound");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:unbound-anchor");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:unbound-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:unbound-python");
  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) 2024 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('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES|SUSE)") audit(AUDIT_OS_NOT, "SUSE / openSUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+|SUSE([\d.]+))", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE / openSUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLED_SAP15|SLES15|SLES_SAP15|SUSE15\.6)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15', 'SUSE / openSUSE (' + os_ver + ')');

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, 'SUSE / openSUSE (' + os_ver + ')', cpu);

var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLED15" && (! preg(pattern:"^(6)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED15 SP6", os_ver + " SP" + service_pack);
if (os_ver == "SLED_SAP15" && (! preg(pattern:"^(6)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED_SAP15 SP6", os_ver + " SP" + service_pack);
if (os_ver == "SLES15" && (! preg(pattern:"^(6)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP6", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP15" && (! preg(pattern:"^(6)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP15 SP6", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'libunbound8-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.6']},
    {'reference':'libunbound8-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.6']},
    {'reference':'unbound-anchor-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.6']},
    {'reference':'unbound-anchor-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.6']},
    {'reference':'unbound-devel-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.6']},
    {'reference':'unbound-devel-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.6']},
    {'reference':'libunbound8-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.6', 'sle-module-basesystem-release-15.6', 'sled-release-15.6', 'sles-release-15.6']},
    {'reference':'libunbound8-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.6', 'sle-module-basesystem-release-15.6', 'sled-release-15.6', 'sles-release-15.6']},
    {'reference':'unbound-anchor-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.6', 'sle-module-basesystem-release-15.6', 'sled-release-15.6', 'sles-release-15.6']},
    {'reference':'unbound-anchor-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.6', 'sle-module-basesystem-release-15.6', 'sled-release-15.6', 'sles-release-15.6']},
    {'reference':'unbound-devel-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.6', 'sle-module-basesystem-release-15.6', 'sled-release-15.6', 'sles-release-15.6']},
    {'reference':'unbound-devel-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.6', 'sle-module-basesystem-release-15.6', 'sled-release-15.6', 'sles-release-15.6']},
    {'reference':'libunbound8-1.20.0-150600.23.3.1', 'release':'SUSE15.6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.6']},
    {'reference':'unbound-1.20.0-150600.23.3.1', 'release':'SUSE15.6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.6']},
    {'reference':'unbound-anchor-1.20.0-150600.23.3.1', 'release':'SUSE15.6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.6']},
    {'reference':'unbound-devel-1.20.0-150600.23.3.1', 'release':'SUSE15.6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.6']},
    {'reference':'unbound-munin-1.20.0-150600.23.3.1', 'release':'SUSE15.6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.6']},
    {'reference':'unbound-python-1.20.0-150600.23.3.1', 'release':'SUSE15.6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.6']},
    {'reference':'unbound-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-packagehub-subpackages-release-15.6']},
    {'reference':'unbound-python-1.20.0-150600.23.3.1', 'sp':'6', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-packagehub-subpackages-release-15.6']}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var exists_check = 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['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (reference && _release) {
    if (exists_check) {
      var check_flag = 0;
      foreach var check (exists_check) {
        if (!rpm_exists(release:_release, rpm:check)) continue;
        check_flag++;
      }
      if (!check_flag) continue;
    }
    if (rpm_check(release:_release, sp:sp, 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, 'libunbound8 / unbound / unbound-anchor / unbound-devel / etc');
}

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.7

Confidence

Low

EPSS

0.05

Percentile

92.9%