CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
77.3%
Samba is prone to a denial of service (DoS) vulnerability.
# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
CPE = "cpe:/a:samba:samba";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.811083");
script_version("2023-07-14T16:09:27+0000");
script_cve_id("CVE-2017-9461");
script_tag(name:"cvss_base", value:"6.8");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:C");
script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
script_tag(name:"creation_date", value:"2017-06-07 17:35:53 +0530 (Wed, 07 Jun 2017)");
script_name("Samba 'fd_open_atomic infinite loop' Denial-of-Service Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2017 Greenbone AG");
script_family("Denial of Service");
script_dependencies("smb_nativelanman.nasl", "gb_samba_detect.nasl");
script_mandatory_keys("samba/smb_or_ssh/detected");
script_xref(name:"URL", value:"https://bugzilla.samba.org/show_bug.cgi?id=12572");
script_xref(name:"URL", value:"https://git.samba.org/?p=samba.git;a=commit;h=10c3e3923022485c720f322ca4f0aca5d7501310");
script_tag(name:"summary", value:"Samba is prone to a denial of service (DoS) vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The flaw exists due to error in smbd
which enters infinite loop when trying to open an invalid symlink with O_CREAT.");
script_tag(name:"impact", value:"Successfully exploiting this issue will allow
remote attackers to conduct a denial-of-service condition(infinite loop with
high CPU usage and memory consumption).");
script_tag(name:"affected", value:"Samba versions before 4.4.10 and 4.5.x
before 4.5.6");
script_tag(name:"solution", value:"Upgrade to Samba 4.4.10 or 4.5.6 or later.");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
exit(0);
}
include("version_func.inc");
include("host_details.inc");
if( isnull( port = get_app_port( cpe:CPE ) ) ) exit( 0 );
if( ! infos = get_app_version_and_location( cpe:CPE, port:port, exit_no_version:TRUE ) ) exit( 0 );
vers = infos['version'];
loc = infos['location'];
if(version_is_less(version:vers, test_version:"4.4.10")){
fix = "4.4.10";
}
else if(vers =~ "^4\.5\." && version_is_less(version:vers, test_version:"4.5.6")){
fix = "4.5.6";
}
if(fix){
report = report_fixed_ver( installed_version:vers, fixed_version:fix, install_path:loc );
security_message( data:report, port:port);
exit(0);
}
exit(99);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
77.3%