RHEL 6 : librelp (RHSA-2018:1702)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1702. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(110084);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/04/15");

  script_cve_id("CVE-2018-1000140");
  script_xref(name:"RHSA", value:"2018:1702");
  script_xref(name:"IAVA", value:"2018-A-0202");

  script_name(english:"RHEL 6 : librelp (RHSA-2018:1702)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for librelp.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2018:1702 advisory.

    Librelp is an easy-to-use library for the Reliable Event Logging Protocol (RELP) protocol. RELP is a
    general-purpose, extensible logging protocol.

    Security Fix(es):

    * librelp: Stack-based buffer overflow in relpTcpChkPeerName function in src/tcp.c (CVE-2018-1000140)

    For more details about the security issue(s), including the impact, a CVSS score, and other related
    information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Rainer Gerhards (rsyslog) for reporting this issue. Upstream acknowledges Bas
    van Schaik (lgtm.com / Semmle) and Kevin Backhouse (lgtm.com / Semmle) as the original reporters.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2018/rhsa-2018_1702.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?26f2920e");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2018:1702");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#critical");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1560084");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL librelp package based on the guidance in RHSA-2018:1702.");
  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-2018-1000140");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(121);
  script_set_attribute(attribute:"vendor_severity", value:"Critical");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:librelp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:librelp-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:6.7");
  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:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("redhat_repos.nasl", "ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'eq', os_version: os_ver, rhel_version: '6.7')) audit(AUDIT_OS_NOT, 'Red Hat 6.7', 'Red Hat ' + 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$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'repo_relative_urls': [
      'content/eus/rhel/computenode/6/6.7/x86_64/debug',
      'content/eus/rhel/computenode/6/6.7/x86_64/optional/debug',
      'content/eus/rhel/computenode/6/6.7/x86_64/optional/os',
      'content/eus/rhel/computenode/6/6.7/x86_64/optional/source/SRPMS',
      'content/eus/rhel/computenode/6/6.7/x86_64/os',
      'content/eus/rhel/computenode/6/6.7/x86_64/sfs/debug',
      'content/eus/rhel/computenode/6/6.7/x86_64/sfs/os',
      'content/eus/rhel/computenode/6/6.7/x86_64/sfs/source/SRPMS',
      'content/eus/rhel/computenode/6/6.7/x86_64/source/SRPMS',
      'content/eus/rhel/power/6/6.7/ppc64/debug',
      'content/eus/rhel/power/6/6.7/ppc64/optional/debug',
      'content/eus/rhel/power/6/6.7/ppc64/optional/os',
      'content/eus/rhel/power/6/6.7/ppc64/optional/source/SRPMS',
      'content/eus/rhel/power/6/6.7/ppc64/os',
      'content/eus/rhel/power/6/6.7/ppc64/source/SRPMS',
      'content/eus/rhel/server/6/6.7/i386/debug',
      'content/eus/rhel/server/6/6.7/i386/highavailability/debug',
      'content/eus/rhel/server/6/6.7/i386/highavailability/os',
      'content/eus/rhel/server/6/6.7/i386/highavailability/source/SRPMS',
      'content/eus/rhel/server/6/6.7/i386/loadbalancer/debug',
      'content/eus/rhel/server/6/6.7/i386/loadbalancer/os',
      'content/eus/rhel/server/6/6.7/i386/loadbalancer/source/SRPMS',
      'content/eus/rhel/server/6/6.7/i386/optional/debug',
      'content/eus/rhel/server/6/6.7/i386/optional/os',
      'content/eus/rhel/server/6/6.7/i386/optional/source/SRPMS',
      'content/eus/rhel/server/6/6.7/i386/os',
      'content/eus/rhel/server/6/6.7/i386/resilientstorage/debug',
      'content/eus/rhel/server/6/6.7/i386/resilientstorage/os',
      'content/eus/rhel/server/6/6.7/i386/resilientstorage/source/SRPMS',
      'content/eus/rhel/server/6/6.7/i386/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/debug',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/debug',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/highavailability/debug',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/highavailability/os',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/highavailability/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/os',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/scalablefilesystem/debug',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/scalablefilesystem/os',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/scalablefilesystem/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/eus-ext/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/highavailability/debug',
      'content/eus/rhel/server/6/6.7/x86_64/highavailability/os',
      'content/eus/rhel/server/6/6.7/x86_64/highavailability/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/loadbalancer/debug',
      'content/eus/rhel/server/6/6.7/x86_64/loadbalancer/os',
      'content/eus/rhel/server/6/6.7/x86_64/loadbalancer/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/optional/debug',
      'content/eus/rhel/server/6/6.7/x86_64/optional/os',
      'content/eus/rhel/server/6/6.7/x86_64/optional/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/os',
      'content/eus/rhel/server/6/6.7/x86_64/resilientstorage/debug',
      'content/eus/rhel/server/6/6.7/x86_64/resilientstorage/os',
      'content/eus/rhel/server/6/6.7/x86_64/resilientstorage/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/sap-hana/debug',
      'content/eus/rhel/server/6/6.7/x86_64/sap-hana/os',
      'content/eus/rhel/server/6/6.7/x86_64/sap-hana/source/SRPMS',
      'content/eus/rhel/server/6/6.7/x86_64/source/SRPMS',
      'content/eus/rhel/system-z/6/6.7/s390x/debug',
      'content/eus/rhel/system-z/6/6.7/s390x/optional/debug',
      'content/eus/rhel/system-z/6/6.7/s390x/optional/os',
      'content/eus/rhel/system-z/6/6.7/s390x/optional/source/SRPMS',
      'content/eus/rhel/system-z/6/6.7/s390x/os',
      'content/eus/rhel/system-z/6/6.7/s390x/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'librelp-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'i686', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'ppc', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'ppc64', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'s390', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'s390x', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-devel-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'i686', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-devel-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'ppc', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-devel-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'ppc64', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-devel-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'s390', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-devel-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'s390x', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'librelp-devel-1.2.7-3.el6_7.1', 'sp':'7', 'cpu':'x86_64', 'release':'6', 'el_string':'el6_7', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_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;
    var cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || 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, cves:cves)) flag++;
  }
}

if (flag)
{
  var subscription_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in the Red Hat Enterprise Linux\n' +
    'Extended Update Support repository.\n' +
    'Access to this repository requires a paid RHEL subscription.\n';
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
  else extra = subscription_caveat + rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'librelp / librelp-devel');
}