CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
AI Score
Confidence
Low
EPSS
Percentile
65.1%
According to its self-reported version number, the instance of Zabbix listening on the remote host is 1.9.x prior to 1.9.4. It could, therefore, be affected by a denial of service vulnerability related to ‘zabbix_agentd’ and ‘vfs.file.cksum’. An attacker can cause excessive CPU usage if the ‘vfs.file.cksum’ command is pointed at a special device such as ‘/dev/urandom’.
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 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(71535);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/05");
script_cve_id("CVE-2011-3263");
script_bugtraq_id(63920);
script_name(english:"Zabbix 1.9.x < 1.9.4 zabbix_agentd DoS");
script_set_attribute(attribute:"synopsis", value:
"The remote web application may be affected by a denial of service
vulnerability.");
script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the instance of Zabbix
listening on the remote host is 1.9.x prior to 1.9.4. It could,
therefore, be affected by a denial of service vulnerability related to
'zabbix_agentd' and 'vfs.file.cksum'. An attacker can cause excessive
CPU usage if the 'vfs.file.cksum' command is pointed at a special device
such as '/dev/urandom'.
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://support.zabbix.com/browse/ZBX-3794");
script_set_attribute(attribute:"see_also", value:"https://www.zabbix.com/rn/rn1.9.4");
script_set_attribute(attribute:"solution", value:
"Update Zabbix to version 1.9.4 or later.");
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:U/RL:OF/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2011-3263");
script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2011/05/09");
script_set_attribute(attribute:"patch_publication_date", value:"2011/05/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/12/19");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:zabbix:zabbix");
script_set_attribute(attribute:"thorough_tests", value:"true");
script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CGI abuses");
script_copyright(english:"This script is Copyright (C) 2013-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("zabbix_frontend_detect.nasl");
script_require_keys("www/zabbix", "Settings/ParanoidReport");
script_exclude_keys("Settings/disable_cgi_scanning");
script_require_ports("Services/www", 80);
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");
port = get_http_port(default:80, php:TRUE);
install = get_install_from_kb(appname:"zabbix", port:port, exit_on_fail:TRUE);
ver = install['ver'];
dir = install['dir'];
install_url = build_url(port:port, qs:dir);
if (ver == UNKNOWN_VER) audit(AUDIT_UNKNOWN_WEB_APP_VER, "Zabbix", install_url);
if (report_paranoia < 2) audit(AUDIT_PARANOID);
fix_version = '1.9.4';
if (ver =~ "^1\.9\." && ver_compare(ver:ver, fix:fix_version, strict:FALSE) < 0)
{
if (report_verbosity > 0)
{
report =
'\n URL : ' + install_url +
'\n Installed version : ' + ver+
'\n Fixed version : ' + fix_version + '\n';
security_warning(port:port, extra:report);
}
else security_warning(port);
exit(0);
}
audit(AUDIT_WEB_APP_NOT_AFFECTED, "Zabbix", install_url, ver);