Oracle Linux 6 / 7 : openssl (ELSA-2016-3621)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2016-3621.
##

include('compat.inc');

if (description)
{
  script_id(181069);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/07");

  script_cve_id(
    "CVE-2016-2177",
    "CVE-2016-2178",
    "CVE-2016-2179",
    "CVE-2016-2180",
    "CVE-2016-2181",
    "CVE-2016-2182",
    "CVE-2016-6302",
    "CVE-2016-6304",
    "CVE-2016-6306"
  );
  script_xref(name:"IAVA", value:"2016-A-0262-S");

  script_name(english:"Oracle Linux 6 / 7 : openssl (ELSA-2016-3621)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in
the ELSA-2016-3621 advisory.

  - OpenSSL through 1.0.2h incorrectly uses pointer arithmetic for heap-buffer boundary checks, which might
    allow remote attackers to cause a denial of service (integer overflow and application crash) or possibly
    have unspecified other impact by leveraging unexpected malloc behavior, related to s3_srvr.c, ssl_sess.c,
    and t1_lib.c. (CVE-2016-2177)

  - The DTLS implementation in OpenSSL before 1.1.0 does not properly restrict the lifetime of queue entries
    associated with unused out-of-order messages, which allows remote attackers to cause a denial of service
    (memory consumption) by maintaining many crafted DTLS sessions simultaneously, related to d1_lib.c,
    statem_dtls.c, statem_lib.c, and statem_srvr.c. (CVE-2016-2179)

  - The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new
    epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial
    of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and
    ssl3_record.c. (CVE-2016-2181)

  - The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size
    during validation of the ticket length, which allows remote attackers to cause a denial of service via a
    ticket that is too short. (CVE-2016-6302)

  - The certificate parser in OpenSSL before 1.0.1u and 1.0.2 before 1.0.2i might allow remote attackers to
    cause a denial of service (out-of-bounds read) via crafted certificate operations, related to s3_clnt.c
    and s3_srvr.c. (CVE-2016-6306)

  - The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure
    the use of constant-time operations, which makes it easier for local users to discover a DSA private key
    via a timing side-channel attack. (CVE-2016-2178)

  - The TS_OBJ_print_bio function in crypto/ts/ts_lib.c in the X.509 Public Key Infrastructure Time-Stamp
    Protocol (TSP) implementation in OpenSSL through 1.0.2h allows remote attackers to cause a denial of
    service (out-of-bounds read and application crash) via a crafted time-stamp file that is mishandled by the
    openssl ts command. (CVE-2016-2180)

  - The BN_bn2dec function in crypto/bn/bn_print.c in OpenSSL before 1.1.0 does not properly validate division
    results, which allows remote attackers to cause a denial of service (out-of-bounds write and application
    crash) or possibly have unspecified other impact via unknown vectors. (CVE-2016-2182)

  - Multiple memory leaks in t1_lib.c in OpenSSL before 1.0.1u, 1.0.2 before 1.0.2i, and 1.1.0 before 1.1.0a
    allow remote attackers to cause a denial of service (memory consumption) via large OCSP Status Request
    extensions. (CVE-2016-6304)

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://linux.oracle.com/errata/ELSA-2016-3621.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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:H/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-2016-2182");

  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:"2016/05/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/09/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-static");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux 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/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 6 / 7', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var pkgs = [
    {'reference':'openssl-1.0.1e-48.ksplice1.el6_8.3', 'cpu':'i686', 'release':'6', 'el_string':'ksplice1.el6_8.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-devel-1.0.1e-48.ksplice1.el6_8.3', 'cpu':'i686', 'release':'6', 'el_string':'ksplice1.el6_8.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-1.0.1e-48.ksplice1.el6_8.3', 'cpu':'x86_64', 'release':'6', 'el_string':'ksplice1.el6_8.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-devel-1.0.1e-48.ksplice1.el6_8.3', 'cpu':'x86_64', 'release':'6', 'el_string':'ksplice1.el6_8.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-perl-1.0.1e-48.ksplice1.el6_8.3', 'cpu':'x86_64', 'release':'6', 'el_string':'ksplice1.el6_8.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-static-1.0.1e-48.ksplice1.el6_8.3', 'cpu':'x86_64', 'release':'6', 'el_string':'ksplice1.el6_8.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-devel-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'i686', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-libs-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'i686', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-static-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'i686', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'x86_64', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-devel-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'x86_64', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-libs-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'x86_64', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-perl-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'x86_64', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
    {'reference':'openssl-static-1.0.1e-51.ksplice1.el7_2.7', 'cpu':'x86_64', 'release':'7', 'el_string':'ksplice1.el7_2.', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 'EL' + 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['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release) {
    if (exists_check) {
        if (rpm_exists(release:_release, rpm:exists_check) && rpm_check(release:_release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    } else {
        if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    }
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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, 'openssl / openssl-devel / openssl-libs / etc');
}