The version of ISC BIND installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the cve-2022-3094 advisory.
named
to allocate large amounts of memory. This, in turn, may cause named
to exit due to a lack of free memory. We are not aware of any cases where this has been exploited. Memory is allocated prior to the checking of access permissions (ACLs) and is retained during the processing of a dynamic update from a client whose access credentials are accepted. Memory allocated to clients that are not permitted to send updates is released immediately upon rejection. The scope of this vulnerability is limited therefore to trusted clients who are permitted to make dynamic zone changes. If a dynamic update is REFUSED, memory will be released again very quickly. Therefore it is only likely to be possible to degrade or stop named
by sending a flood of unaccepted dynamic updates comparable in magnitude to a query flood intended to achieve the same detrimental outcome. BIND 9.11 and earlier branches are also affected, but through exhaustion of internal resources rather than memory constraints. This may reduce performance but should not be a significant problem for most servers.Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(170681);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/06/30");
script_cve_id("CVE-2022-3094");
script_xref(name:"IAVA", value:"2023-A-0058-S");
script_name(english:"ISC BIND 9.16.0 < 9.16.37 / 9.16.8-S1 < 9.16.37-S1 / 9.18.0 < 9.18.11 / 9.19.0 < 9.19.9 Vulnerability (cve-2022-3094)");
script_set_attribute(attribute:"synopsis", value:
"The remote name server is affected by a vulnerability vulnerability.");
script_set_attribute(attribute:"description", value:
"The version of ISC BIND installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the cve-2022-3094 advisory.
- Sending a flood of dynamic DNS updates may cause `named` to allocate large amounts of memory. This, in
turn, may cause `named` to exit due to a lack of free memory. We are not aware of any cases where this has
been exploited. Memory is allocated prior to the checking of access permissions (ACLs) and is retained
during the processing of a dynamic update from a client whose access credentials are accepted. Memory
allocated to clients that are not permitted to send updates is released immediately upon rejection. The
scope of this vulnerability is limited therefore to trusted clients who are permitted to make dynamic zone
changes. If a dynamic update is REFUSED, memory will be released again very quickly. Therefore it is only
likely to be possible to degrade or stop `named` by sending a flood of unaccepted dynamic updates
comparable in magnitude to a query flood intended to achieve the same detrimental outcome. BIND 9.11 and
earlier branches are also affected, but through exhaustion of internal resources rather than memory
constraints. This may reduce performance but should not be a significant problem for most servers.
Therefore we don't intend to address this for BIND versions prior to BIND 9.16. This issue affects BIND 9
versions 9.16.0 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.8-S1 through
9.16.36-S1. (CVE-2022-3094)
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://kb.isc.org/v1/docs/cve-2022-3094");
script_set_attribute(attribute:"solution", value:
"Upgrade to ISC BIND version 9.16.37 / 9.16.37-S1 / 9.18.11 / 9.19.9 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/AC:L/PR:N/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-2022-3094");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/01/25");
script_set_attribute(attribute:"patch_publication_date", value:"2023/01/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/01/26");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:isc:bind");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"DNS");
script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("bind_version.nasl");
script_require_keys("bind/version", "Settings/ParanoidReport");
exit(0);
}
include('vcf.inc');
include('vcf_extras.inc');
vcf::bind::initialize();
var app_info = vcf::get_app_info(app:'BIND', port:53, kb_ver:'bind/version', service:TRUE, proto:'UDP');
if (report_paranoia < 2) audit(AUDIT_PARANOID);
var constraints = [
{ 'min_version' : '9.16.0', 'max_version' : '9.16.36', 'fixed_version' : '9.16.37' },
{ 'min_version' : '9.16.8-S1', 'max_version' : '9.16.36-S1', 'fixed_version' : '9.16.37-S1' },
{ 'min_version' : '9.18.0', 'max_version' : '9.18.10', 'fixed_version' : '9.18.11' },
{ 'min_version' : '9.19.0', 'max_version' : '9.19.8', 'fixed_version' : '9.19.9' }
];
constraints = vcf::bind::filter_constraints(constraints:constraints, version:app_info.version);
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);