RHEL 6 : kernel-rt (RHSA-2012:0061)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2012:0061. The text 
# itself is copyright (C) Red Hat, Inc.
#

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

if (description)
{
  script_id(76636);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id("CVE-2012-0056");
  script_bugtraq_id(51625);
  script_xref(name:"RHSA", value:"2012:0061");

  script_name(english:"RHEL 6 : kernel-rt (RHSA-2012:0061)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for kernel-rt.");
  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-2012:0061 advisory.

    The kernel-rt packages contain the Linux kernel, the core of any Linux
    operating system.

    This update fixes the following security issue:

    * It was found that permissions were not checked properly in the Linux
    kernel when handling the /proc/[pid]/mem writing functionality. A local,
    unprivileged user could use this flaw to escalate their privileges. Refer
    to Red Hat Knowledgebase article DOC-69129, linked to in the References,
    for further information. (CVE-2012-0056, Important)

    Red Hat would like to thank Jri Aedla for reporting this issue.

    Users should upgrade to these updated packages, which correct this issue.
    The system must be rebooted for this update to take effect.

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://access.redhat.com/security/data/csaf/v2/advisories/2012/rhsa-2012_0061.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eb45b66b");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=782642");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2012:0061");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/kb/docs/DOC-69129");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel-rt package based on the guidance in RHSA-2012:0061.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2012-0056");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");
  script_cwe_id(863);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/01/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/01/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/07/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2014-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl", "redhat_repos.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');
include('ksplice.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: 'ge', os_version: os_ver, rhel_version: '6')) audit(AUDIT_OS_NOT, 'Red Hat 6.x', '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);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2012-0056');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2012:0061');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g-execute/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g-execute/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g-execute/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-m/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-m/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-m/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-mgmt/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-mgmt/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-mgmt/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-r/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-r/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-r/2/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-rt-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-debug-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-debug-devel-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-devel-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-doc-3.0.9-rt26.46.el6rt', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-firmware-3.0.9-rt26.46.el6rt', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-trace-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-trace-devel-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-vanilla-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-vanilla-devel-3.0.9-rt26.46.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'mrg-release'}
    ]
  }
];

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 extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel-rt / kernel-rt-debug / kernel-rt-debug-devel / etc');
}