Xenstore: Guests can create orphaned Xenstore nodes (XSA-415)

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

include('compat.inc');

if (description)
{
  script_id(168022);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/08");

  script_cve_id("CVE-2022-42310");
  script_xref(name:"IAVB", value:"2022-B-0048-S");

  script_name(english:"Xenstore: Guests can create orphaned Xenstore nodes (XSA-415)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Xen hypervisor installation is missing a security update.");
  script_set_attribute(attribute:"description", value:
"By creating multiple nodes inside a transaction resulting in an error, a malicious guest can create orphaned 
nodes in the Xenstore data base, as the cleanup after the error will not remove all nodes already created. 
When the transaction is committed after this situation, nodes without a valid parent can be made permanent in 
the data base. A malicious guest can cause inconsistencies in the xenstored data base, resulting in unusual
error responses or memory leaks in xenstored. This can finally cause Denial of Service situations or long 
running error recoveries 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-415.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:U/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-2022-42310");

  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:"2022/11/21");

  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 fcba6c7)';
fixes['4.13']['affected_ver_regex']  = "^4\.13([^0-9]|$)";
fixes['4.13']['affected_changesets'] = make_list('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 bd50953)';
fixes['4.14']['affected_ver_regex']  = "^4\.14([^0-9]|$)";
fixes['4.14']['affected_changesets'] = make_list('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 579e733)';
fixes['4.15']['affected_ver_regex']  = "^4\.15([^0-9]|$)";
fixes['4.15']['affected_changesets'] = make_list('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 427e86b)';
fixes['4.16']['affected_ver_regex']  = "^4\.16([^0-9]|$)";
fixes['4.16']['affected_changesets'] = make_list('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);