RHEL 7 : kernel-alt (RHSA-2018:2948)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:2948. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(118513);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/27");

  script_cve_id(
    "CVE-2017-13166",
    "CVE-2017-16648",
    "CVE-2017-17805",
    "CVE-2017-17806",
    "CVE-2017-18075",
    "CVE-2017-18208",
    "CVE-2017-18344",
    "CVE-2018-1065",
    "CVE-2018-1068",
    "CVE-2018-1092",
    "CVE-2018-1094",
    "CVE-2018-1095",
    "CVE-2018-1118",
    "CVE-2018-1120",
    "CVE-2018-3639",
    "CVE-2018-5344",
    "CVE-2018-5390",
    "CVE-2018-5391",
    "CVE-2018-5750",
    "CVE-2018-5803",
    "CVE-2018-5848",
    "CVE-2018-7566",
    "CVE-2018-7757",
    "CVE-2018-8781",
    "CVE-2018-9363",
    "CVE-2018-10322",
    "CVE-2018-10877",
    "CVE-2018-10878",
    "CVE-2018-10879",
    "CVE-2018-10880",
    "CVE-2018-10881",
    "CVE-2018-10882",
    "CVE-2018-10883",
    "CVE-2018-10940",
    "CVE-2018-11506",
    "CVE-2018-12232",
    "CVE-2018-13405",
    "CVE-2018-14619",
    "CVE-2018-14641",
    "CVE-2018-1000026",
    "CVE-2018-1000200",
    "CVE-2018-1000204"
  );
  script_xref(name:"RHSA", value:"2018:2948");

  script_name(english:"RHEL 7 : kernel-alt (RHSA-2018:2948)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2018:2948 advisory.

  - kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation (CVE-2017-13166)

  - kernel: Use-after-free in drivers/media/dvb-core/dvb_frontend.c (CVE-2017-16648)

  - kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local attackers
    to cause denial-of-service (CVE-2017-17805)

  - kernel: HMAC implementation does not validate that the underlying cryptographic hash algorithm is unkeyed
    allowing local attackers to cause denial-of-service (CVE-2017-17806)

  - kernel: Mishandled freeing of instances in pcrypt.c can allow a local user to cause a denial of service
    (CVE-2017-18075)

  - kernel: Inifinite loop vulnerability in mm/madvise.c:madvise_willneed() function allows local denial of
    service (CVE-2017-18208)

  - kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c (CVE-2017-18344)

  - kernel: netfilter: xtables NULL pointer dereference in ip6_tables.c:ip6t_do_table() leading to a crash
    (CVE-2018-1065)

  - kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c
    (CVE-2018-1068)

  - kernel: NULL pointer dereference in ext4/mballoc.c:ext4_process_freed_data() when mounting crafted ext4
    image (CVE-2018-1092)

  - kernel: NULL pointer dereference in ext4/xattr.c:ext4_xattr_inode_hash() causes crash with crafted ext4
    image (CVE-2018-1094)

  - kernel: out-of-bound access in fs/posix_acl.c:get_acl() causes crash with crafted ext4 image
    (CVE-2018-1095)

  - kernel: vhost: Information disclosure in vhost/vhost.c:vhost_new_msg() (CVE-2018-1118)

  - kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service (CVE-2018-1120)

  - hw: cpu: speculative store bypass (CVE-2018-3639)

  - kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial-of-service
    (CVE-2018-5344)

  - kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack) (CVE-2018-5390)

  - kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack) (CVE-2018-5391)

  - kernel: Kernel address information leak in drivers/acpi/sbshc.c:acpi_smbus_hc_add() function potentially
    allowing KASLR bypass (CVE-2018-5750)

  - kernel: Missing length check of payload in net/sctp/sm_make_chunk.c:_sctp_make_chunk() function allows
    denial of service (CVE-2018-5803)

  - kernel: buffer overflow in drivers/net/wireless/ath/wil6210/wmi.c:wmi_set_ie() may lead to memory
    corruption (CVE-2018-5848)

  - kernel: race condition in snd_seq_write() may lead to UAF or OOB-access (CVE-2018-7566)

  - kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c
    (CVE-2018-7757)

  - kernel: Integer overflow in drivers/gpu/drm/udl/udl_fb.c:udl_fb_mmap() can allow attackers to execute code
    in kernel space (CVE-2018-8781)

  - kernel: Buffer overflow in hidp_process_report (CVE-2018-9363)

  - kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared() when mounting crafted xfs image
    allowing denial of service (CVE-2018-10322)

  - kernel: out-of-bound access in ext4_ext_drop_refs function with a crafted ext4 image (CVE-2018-10877)

  - kernel: out-of-bound write in ext4_init_block_bitmap function with a crafted ext4 image (CVE-2018-10878)

  - kernel: use-after-free detected in ext4_xattr_set_entry with a crafted file (CVE-2018-10879)

  - kernel: stack-out-of-bounds write in ext4_update_inline_data function (CVE-2018-10880)

  - kernel: out-of-bound access in ext4_get_group_info() when mounting and operating a crafted ext4 image
    (CVE-2018-10881)

  - kernel: stack-out-of-bounds write infs/jbd2/transaction.c (CVE-2018-10882)

  - kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata function (CVE-2018-10883)

  - kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c (CVE-2018-10940)

  - kernel: Stack-based buffer overflow in drivers/scsi/sr_ioctl.c allows denial of service or other
    unspecified impact (CVE-2018-11506)

  - kernel: NULL pointer dereference if close and fchownat system calls share a socket file descriptor
    (CVE-2018-12232)

  - kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-
    members (CVE-2018-13405)

  - kernel: crash (possible privesc) in kernel crypto api. (CVE-2018-14619)

  - kernel: a bug in ip_frag_reasm() can cause a crash in ip_do_fragment() (CVE-2018-14641)

  - kernel: Improper validation in bnx2x network card driver can allow for denial of service attacks via
    crafted packet (CVE-2018-1000026)

  - kernel: NULL pointer dereference on OOM kill of large mlocked process (CVE-2018-1000200)

  - kernel: Infoleak caused by incorrect handling of the SG_IO ioctl (CVE-2018-1000204)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2018/rhsa-2018_2948.json
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1571062");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1571623");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1573699");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1575472");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1577408");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1596802");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1596806");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1596812");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1596828");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1596842");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1596846");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1599161");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1601704");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1610958");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1622004");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1623067");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1629636");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2018:2948");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/vulnerabilities/ssbd");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:N/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-2018-9363");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", 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_set_attribute(attribute:"in_the_news", value:"true");
  script_cwe_id(119, 120, 121, 122, 125, 190, 20, 200, 266, 284, 362, 391, 400, 416, 456, 476, 628, 787, 835);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
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  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) 2018-2024 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: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.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-2017-13166', 'CVE-2017-16648', 'CVE-2017-17805', 'CVE-2017-17806', 'CVE-2017-18075', 'CVE-2017-18208', 'CVE-2017-18344', 'CVE-2018-1065', 'CVE-2018-1068', 'CVE-2018-1092', 'CVE-2018-1094', 'CVE-2018-1095', 'CVE-2018-1118', 'CVE-2018-1120', 'CVE-2018-3639', 'CVE-2018-5344', 'CVE-2018-5390', 'CVE-2018-5391', 'CVE-2018-5750', 'CVE-2018-5803', 'CVE-2018-5848', 'CVE-2018-7566', 'CVE-2018-7757', 'CVE-2018-8781', 'CVE-2018-9363', 'CVE-2018-10322', 'CVE-2018-10877', 'CVE-2018-10878', 'CVE-2018-10879', 'CVE-2018-10880', 'CVE-2018-10881', 'CVE-2018-10882', 'CVE-2018-10883', 'CVE-2018-10940', 'CVE-2018-11506', 'CVE-2018-12232', 'CVE-2018-13405', 'CVE-2018-14619', 'CVE-2018-14641', 'CVE-2018-1000026', 'CVE-2018-1000200', 'CVE-2018-1000204');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2018:2948');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
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    'repo_relative_urls': [
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/os',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/os',
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      'content/dist/rhel/power-le/7/7.9/ppc64le/resilientstorage/debug',
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      'content/fastrack/rhel/power/7/ppc64/optional/debug',
      'content/fastrack/rhel/power/7/ppc64/optional/os',
      'content/fastrack/rhel/power/7/ppc64/optional/source/SRPMS',
      'content/fastrack/rhel/power/7/ppc64/os',
      'content/fastrack/rhel/power/7/ppc64/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-bootwrapper-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-perf-4.14.0-115.el7a', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7a', '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 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_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, 'kernel / kernel-bootwrapper / kernel-debug / kernel-debug-devel / etc');
}