RHEL 6 : libarchive (Unpatched Vulnerability)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory libarchive. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(195496);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/11");

  script_cve_id(
    "CVE-2016-10209",
    "CVE-2016-10349",
    "CVE-2016-10350",
    "CVE-2017-14166",
    "CVE-2017-14501",
    "CVE-2017-14502",
    "CVE-2017-14503",
    "CVE-2019-19221",
    "CVE-2019-1000020",
    "CVE-2020-21674",
    "CVE-2021-23177",
    "CVE-2021-31566",
    "CVE-2022-36227",
    "CVE-2023-30571"
  );

  script_name(english:"RHEL 6 : libarchive (Unpatched Vulnerability)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat 6 host is affected by multiple vulnerabilities that will not be patched.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple
vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - libarchive: Off-by-one error in the read_header function (CVE-2017-14502)

  - libarchive: NULL pointer dereference in archive_write.c (CVE-2022-36227)

  - The archive_wstring_append_from_mbs function in archive_string.c in libarchive 3.2.2 allows remote
    attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted
    archive file. (CVE-2016-10209)

  - The archive_le32dec function in archive_endian.h in libarchive 3.2.2 allows remote attackers to cause a
    denial of service (heap-based buffer over-read and application crash) via a crafted file. (CVE-2016-10349)

  - The archive_read_format_cab_read_header function in archive_read_support_format_cab.c in libarchive 3.2.2
    allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash)
    via a crafted file. (CVE-2016-10350)

  - libarchive 3.3.2 allows remote attackers to cause a denial of service (xml_data heap-based buffer over-
    read and application crash) via a crafted xar archive, related to the mishandling of empty strings in the
    atol8 function in archive_read_support_format_xar.c. (CVE-2017-14166)

  - An out-of-bounds read flaw exists in parse_file_info in archive_read_support_format_iso9660.c in
    libarchive 3.3.2 when extracting a specially crafted iso9660 iso file, related to
    archive_read_format_iso9660_read_header. (CVE-2017-14501)

  - libarchive 3.3.2 suffers from an out-of-bounds read within lha_read_data_none() in
    archive_read_support_format_lha.c when extracting a specially crafted lha archive, related to lha_crc16.
    (CVE-2017-14503)

  - libarchive version commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 onwards (version v2.8.0 onwards)
    contains a CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in ISO9660
    parser, archive_read_support_format_iso9660.c, read_CE()/parse_rockridge() that can result in DoS by
    infinite loop. This attack appears to be exploitable via the victim opening a specially crafted ISO9660
    file. (CVE-2019-1000020)

  - In Libarchive 3.4.0, archive_wstring_append_from_mbs in archive_string.c has an out-of-bounds read because
    of an incorrect mbrtowc or mbtowc call. For example, bsdtar crashes via a crafted archive.
    (CVE-2019-19221)

  - Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev
    allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a
    crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from
    GitHub. Users of the product's official releases are unaffected. (CVE-2020-21674)

  - An improper link resolution flaw while extracting an archive can lead to changing the access control list
    (ACL) of the target of the link. An attacker may provide a malicious archive to a victim user, who would
    trigger this flaw when trying to extract the archive. A local attacker may use this flaw to change the ACL
    of a file on the system and gain more privileges. (CVE-2021-23177)

  - An improper link resolution flaw can occur while extracting an archive leading to changing modes, times,
    access control lists, and flags of a file outside of the archive. An attacker may provide a malicious
    archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker
    may use this flaw to gain more privileges in a system. (CVE-2021-31566)

  - Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside
    archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race
    condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to
    implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-
    privileged local user can delete and rename files inside those directories. (CVE-2023-30571)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package
is installed.");
  script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation
guidance.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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-2017-14502");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-36227");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/06/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libarchive");
  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) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.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');

if (!get_kb_item("global_settings/vendor_unpatched"))
exit(0, "Unpatched Vulnerabilities Detection not active.");

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);

var constraints = [
  {
    'pkgs': [
      {'reference':'libarchive', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'unpatched_pkg':'libarchive'}
    ]
  }
];


var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);
  foreach var pkg ( constraint_array['pkgs'] ) {
    var unpatched_pkg = NULL;
    var _release = NULL;
    var sp = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['unpatched_pkg'])) unpatched_pkg = pkg['unpatched_pkg'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (unpatched_pkg &&
        _release &&
        (!exists_check || rpm_exists(release:_release, rpm:exists_check)) &&
        unpatched_package_exists(release:_release, package:unpatched_pkg, cves: cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : unpatched_packages_report()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libarchive');
}