SUSE SLED15 / SLES15 / openSUSE 15 Security Update : openssl-1_1 (SUSE-SU-2023:2648-1)

2023-06-2800:00:00

www.tenable.com

suse sled15

sles15

opensuse 15

security update

openssl

timing side channel

rsa decryption

plaintext recovery

bleichenbacher attack

network vulnerability

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.002

Percentile

55.2%

JSON

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:2648-1 advisory.

A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption.
The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection. (CVE-2022-4304)

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 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2023:2648-1. The text itself
# is copyright (C) SUSE.
##

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

if (description)
{
  script_id(177704);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/14");

  script_cve_id("CVE-2022-4304");
  script_xref(name:"SuSE", value:"SUSE-SU-2023:2648-1");

  script_name(english:"SUSE SLED15 / SLES15 / openSUSE 15 Security Update : openssl-1_1 (SUSE-SU-2023:2648-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing a security update.");
  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 a vulnerability as referenced in the SUSE-SU-2023:2648-1 advisory.

  - A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient
    to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful
    decryption an attacker would have to be able to send a very large number of trial messages for decryption.
    The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS
    connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An
    attacker that had observed a genuine connection between a client and a server could use this flaw to send
    trial messages to the server and record the time taken to process them. After a sufficiently large number
    of messages the attacker could recover the pre-master secret used for the original connection and thus be
    able to decrypt the application data sent over that connection. (CVE-2022-4304)

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/1201627");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1207534");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-4304");
  # https://lists.suse.com/pipermail/sle-security-updates/2023-June/015323.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?767999a9");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/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:H/PR:N/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-2022-4304");

  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:"2022/12/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/06/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/06/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl-1_1-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl-1_1-devel-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1-hmac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1-hmac-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssl-1_1");
  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) 2023 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\.4)$", 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:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED15 SP4", os_ver + " SP" + service_pack);
if (os_ver == "SLED_SAP15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED_SAP15 SP4", os_ver + " SP" + service_pack);
if (os_ver == "SLES15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP4", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP15 SP4", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'libopenssl-1_1-devel-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl-1_1-devel-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl-1_1-devel-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl-1_1-devel-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-hmac-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-hmac-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-hmac-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl1_1-hmac-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'openssl-1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'openssl-1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libopenssl-1_1-devel-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl-1_1-devel-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl-1_1-devel-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl-1_1-devel-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-hmac-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-hmac-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-hmac-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl1_1-hmac-32bit-1.1.1l-150400.7.42.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'openssl-1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'openssl-1_1-1.1.1l-150400.7.42.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4', 'suse-manager-server-release-4.3']},
    {'reference':'libopenssl-1_1-devel-1.1.1l-150400.7.42.1', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'libopenssl-1_1-devel-32bit-1.1.1l-150400.7.42.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'libopenssl1_1-1.1.1l-150400.7.42.1', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'libopenssl1_1-32bit-1.1.1l-150400.7.42.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'libopenssl1_1-hmac-1.1.1l-150400.7.42.1', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'libopenssl1_1-hmac-32bit-1.1.1l-150400.7.42.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'openssl-1_1-1.1.1l-150400.7.42.1', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
    {'reference':'openssl-1_1-doc-1.1.1l-150400.7.42.1', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']}
];

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, 'libopenssl-1_1-devel / libopenssl-1_1-devel-32bit / libopenssl1_1 / etc');
}