Xenstore: Guests can cause Xenstore to not free temporary memory (XSA-416)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable Inc.
##

include('compat.inc');

if (description)
{
  script_id(168052);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/08");

  script_cve_id("CVE-2022-42319");
  script_xref(name:"IAVB", value:"2022-B-0048-S");

  script_name(english:"Xenstore: Guests can cause Xenstore to not free temporary memory (XSA-416)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Xen hypervisor installation is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might
need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been
finished completely. A request is regarded to be finished only after the guest has read the response message of the
request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory.
This can result in memory shortages causing Denial of Service (DoS) of xenstored.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version   
number.");
  script_set_attribute(attribute:"see_also", value:"https://xenbits.xenproject.org/xsa/advisory-416.txt");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch according to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-42319");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/11/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/11/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/11/22");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:xen:xen");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("xen_server_detect.nbin");
  script_require_keys("installed_sw/Xen Hypervisor", "Settings/ParanoidReport");

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

var fixes;
var app = 'Xen Hypervisor';
var app_info = vcf::xen_hypervisor::get_app_info(app:app);
if (report_paranoia < 2) audit(AUDIT_PARANOID);

fixes['4.13']['fixed_ver']           = '4.13.4';
fixes['4.13']['fixed_ver_display']   = '4.13.4 (changeset 2fdf874)';
fixes['4.13']['affected_ver_regex']  = "^4\.13([^0-9]|$)";
fixes['4.13']['affected_changesets'] = make_list('e30f7c6', '0252d04',
  '723e248', 'c3c5f0a', '0135300', 'bc93157', 'c084ee8', 'd71e4ec',
  '63dc2a1', '146b954', '7dc06ed', 'c17d491', '115156c', 'b917d57',
  '8cd25ae', 'f859218', '5fa4f2c', 'e84ef3b', '2963ee5', '538b61b',
  'cde36e0', '1761828', '6f31127', '95fe444', 'fcba6c7', '149ebf0',
  '5b66863', '3954468', '0be63c2', '042de08', '867fcf6', 'e6b1e38',
  '2ae9bbe', '9992c08', 'eed4ef4', '3e7aa35', '6e537d3', '08eec20',
  '181ff7a', 'aa78910', '0021c26', '763f965', '4e38cc1', '5475195',
  'bde3b13', 'd8a6930', 'c946524', 'f8614c7', '3feba68', '3c71016',
  'ebe3f5d', '5994b73', 'fbf19ba', 'ba33672', '196b4f4', '10d8c56',
  '4b42462', 'a7e7287', '159e223', 'b8d573a', '074e388', 'bf5f5e8',
  '8974821', '55e4c72', 'd43b47e', '4eddf13', 'f614e3c', '8a2cc1e',
  '14c5e0c', '87ff113', '413b083', 'a84bc5b', '1575075', 'f9ae12f',
  'e8c04e4', '8d9f361', 'fce392f', 'c7da430', '7669737', '3826ba5',
  'fe97133', 'd64d466', 'a6902a6', '169a283', '454d535', 'e6d6b5b',
  '7cfe357', 'ab37463', '92acf6b', '73e25ec', '235aa15', '33c1365',
  '81918ce', '650b888', '920e93d', '2ce2aec', '8ed46cc', '7b9814b',
  'fbabb62', '47125f5', 'd99df7d', '03db213', '9a8804a', 'ce49a1d',
  'e48c787', '2d601a5', 'd0e2c27', 'd3c2319', 'd3cfb4b', 'd94d006',
  '0b28069', 'b4bb02d', '6e2fc12');

fixes['4.14']['fixed_ver']           = '4.14.5';
fixes['4.14']['fixed_ver_display']   = '4.14.5 (changeset 55e23bf)';
fixes['4.14']['affected_ver_regex']  = "^4\.14([^0-9]|$)";
fixes['4.14']['affected_changesets'] = make_list('2cf1372', '8db5e6f',
  'b8b3734', '7f5d36d', '3a67865', '276908c', 'f6a5a1d', '0bc44ec',
  '7c5316d', '0cc9d66', '36812ae', '3a7c46a', 'cc28906', '03889b6',
  '0406917', '93a9c3a', '82dfb67', '9ad9fde', '83b9da9', '3dafa5a',
  '36ed7fe', 'a03e2a3', '3530aa6', '00240cf', 'bd50953', 'd0dd461',
  '96220ae', 'f25c377', '016de62', '6e5608d', '7d64fb5', '4220eac',
  'fd688b0', 'e3b66e5', '804f83b', 'f90615c', 'fc10984', '9b5a7fd',
  'b8f4a5d', '0bab3ab', '3163e34', '54b6eab', '9c975e6', '7a7406b',
  '4ed063a', '261b882', 'ef571a5', '87d90d5', '5bccfbb', '318d7bc',
  '0a6561b', 'd2f0cf7', '51e812a', '73465a7', 'b60c995', 'e5fd508',
  '2d31666', 'f178689', 'a556377', '104dd46', 'c5f774e', '9f07848',
  '878e684', 'd7ebe3d', '82ba97e', '25c7ade', '204d4f1', '07fbed8',
  'a72146d', '758f40d', 'c70071e', '17848df');

fixes['4.15']['fixed_ver']           = '4.15.4';
fixes['4.15']['fixed_ver_display']   = '4.15.4-pre (changeset 607e186)';
fixes['4.15']['affected_ver_regex']  = "^4\.15([^0-9]|$)";
fixes['4.15']['affected_changesets'] = make_list('26faa6b', '64048b4',
  '9e5290d', 'fccdca8', 'bbb4cea', '9f89883', '4581622', '8fabb96',
  '4d30175', '1fc3ecc', '32efe29', '9c2e71f', '0113aac', 'aa29eb6',
  'ccef72b', '1035371', '8ee7ed7', '3e51699', '97c251f', '56300e8',
  '53a77b8', '8999db8', 'b322923', '0d8bea4', '579e733', 'ee03d9b',
  'ddab5b1', 'b68e3fd', 'a46f01f', '317894f', '9b8b65c', 'bff4c44',
  '6b035f4', '08bc78b', '9c51146', '1f679f0', 'b833014', '916668b',
  '3885fa4', 'f8915cd', '6f948fd', '816580a', '0d23392', '9690bb2',
  '62e534d', '3ac64b3', '182f8bb', '19cf28b', 'd176808', 'd638c20',
  '735b108', '7923ea4', 'd65ebac', 'bb43a10', '7ad38a3', 'c521504',
  '45336d8', '0c0680d', 'b03074b', '686c920', '7f055b0', '4f9b535',
  '1e26afa', '95f6d55', 'd24a10a', '0f3eab9', '0d805f9', '09fc590',
  '9acedc3', 'a075900', '104a54a', 'fba0c22', 'c373ad3', '1e31848',
  '5efcae1', '8ae0b4d', 'df3395f', '1b9845d', 'b64f1c9', '30d3de4',
  '4799a20', 'a095c6c', '5f1d017', 'c370994', 'a2684d9', '2173d9c',
  '3859f3e', '35bf91d', '409976b', '2b29ac4', 'f0d78e0', 'd7f5fb1',
  'c707015', '2cfbca3', '156ab77', '505771b');

fixes['4.16']['fixed_ver']           = '4.16.3';
fixes['4.16']['fixed_ver_display']   = '4.16.3-pre (changeset c758765)';
fixes['4.16']['affected_ver_regex']  = "^4\.16([^0-9]|$)";
fixes['4.16']['affected_changesets'] = make_list('a026fdd', 'cec3c52',
  'ea15678', '59981b0', '8b60ad4', 'a63bbcf', 'ab21bb1', 'b0e95b4',
  'b584b9b', '0a67b4e', '578d422', 'bce9857', '30c8e75', '2e406cf',
  '2d39cf7', '7017cfe', '717460e', '787241f', 'b270ad4', '49344fb',
  'd08cdf0', 'e26d6f4', 'f8af1a2', 'ce6aea7', '427e86b', '28ea39a',
  '62e7fb7', 'c229b16', '2f75e36', '08f6c88', '426a834', 'aac1085',
  '8f3f8f2', '96d26f1', '9fdb4f1', '88f2bf5', '481465f', '54f8ed8',
  'd4a11d6', '02ab5e9', '5dae065', 'e5a5bde', '86cb374', '1bce7fb',
  '3f4da85', 'b956076', '4951007', '2b694dd', '4f3204c', 'c377cea',
  'd4e971a', 'e8882bc', 'e85e2a3', '32cb815', '44e9dcc', '3a16da8',
  '914fc8e', '755a9b5', 'a603386', 'f5959ed', '943635d', '745e0b3',
  '28d3f67', '40e9daf', '3422c19', '8fc19c1', '937fdba', '8d9531a', '4aa3291');

vcf::xen_hypervisor::check_version_and_report(app_info:app_info, fixes:fixes, severity:SECURITY_WARNING);