CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
AI Score
Confidence
High
EPSS
Percentile
57.5%
Python
# SPDX-FileCopyrightText: 2021 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:python:python";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.112998");
script_version("2023-07-05T05:06:18+0000");
script_tag(name:"last_modification", value:"2023-07-05 05:06:18 +0000 (Wed, 05 Jul 2023)");
script_tag(name:"creation_date", value:"2021-11-02 10:32:11 +0000 (Tue, 02 Nov 2021)");
script_tag(name:"cvss_base", value:"4.3");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
script_cve_id("CVE-2013-4238");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Python 2.6.x < 2.6.9, 2.7.x < 2.7.6, 3.2.x < 3.2.6, 3.3.x < 3.3.3 SSL NULL Byte Vulnerability (bpo-18709) - Linux");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("General");
script_dependencies("gb_python_consolidation.nasl", "os_detection.nasl");
script_mandatory_keys("python/detected", "Host/runs_unixoide");
script_tag(name:"summary", value:"Python's SSL module fails to handle NULL bytes inside subjectAltNames general names.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The ssl.match_hostname function in the SSL module in Python
does not properly handle a '0' character in a domain name in the Subject Alternative Name field
of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers
via a crafted certificate issued by a legitimate Certification Authority.");
script_tag(name:"affected", value:"Python 2.6 before 2.6.9, 2.7 before 2.7.6, 3.2 before 3.2.6 and 3.3 before 3.3.3.");
script_tag(name:"solution", value:"The vendor has released updates. Please see the references for
more information.");
script_xref(name:"URL", value:"https://python-security.readthedocs.io/vuln/ssl-null-subjectaltnames.html");
script_xref(name:"Advisory-ID", value:"bpo-18709");
exit(0);
}
include("host_details.inc");
include("version_func.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, version_regex:"^[0-9]+\.[0-9]+\.[0-9]+" ) )
exit( 0 );
version = infos["version"];
location = infos["location"];
if( version_in_range( version:version, test_version:"2.6", test_version2:"2.6.8" ) ) {
report = report_fixed_ver( installed_version:version, fixed_version:"2.6.9", install_path:location );
security_message( port:port, data:report );
exit( 0 );
}
if( version_in_range( version:version, test_version:"2.7", test_version2:"2.7.5" ) ) {
report = report_fixed_ver( installed_version:version, fixed_version:"2.7.6", install_path:location );
security_message( port:port, data:report );
exit( 0 );
}
if( version_in_range( version:version, test_version:"3.2", test_version2:"3.2.5" ) ) {
report = report_fixed_ver( installed_version:version, fixed_version:"3.2.6", install_path:location );
security_message( port:port, data:report );
exit( 0 );
}
if( version_in_range( version:version, test_version:"3.3", test_version2:"3.3.2" ) ) {
report = report_fixed_ver( installed_version:version, fixed_version:"3.3.3", install_path:location );
security_message( port:port, data:report );
exit( 0 );
}
exit( 99 );