CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
59.3%
This host is missing an important security
update for PowerShell Core according to Microsoft security advisory
CVE-2018-8356.
# SPDX-FileCopyrightText: 2018 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:microsoft:powershell";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.813698");
script_version("2024-02-16T05:06:55+0000");
script_cve_id("CVE-2018-8356");
script_tag(name:"cvss_base", value:"2.1");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:N/I:P/A:N");
script_tag(name:"last_modification", value:"2024-02-16 05:06:55 +0000 (Fri, 16 Feb 2024)");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2018-09-10 15:31:00 +0000 (Mon, 10 Sep 2018)");
script_tag(name:"creation_date", value:"2018-07-20 11:49:16 +0530 (Fri, 20 Jul 2018)");
script_name("Microsoft PowerShell Core Security Feature Bypass Vulnerability (Jul 2018) - Linux");
script_tag(name:"summary", value:"This host is missing an important security
update for PowerShell Core according to Microsoft security advisory
CVE-2018-8356.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The flaw exists when Microsoft .NET Framework
components do not correctly validate certificates.");
script_tag(name:"impact", value:"Successful exploitation will allow attackers
to present expired certificates when challenged.");
script_tag(name:"affected", value:"PowerShell Core versions 6.x prior to 6.0.3
and 6.1.x prior to 6.1.0-preview.4 on Linux.");
script_tag(name:"solution", value:"Update PowerShell Core to version 6.0.3 or
6.1.0-preview.4 or later. Please see the references for more information.");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"executable_version");
script_xref(name:"URL", value:"https://github.com/PowerShell/PowerShell");
script_xref(name:"URL", value:"https://github.com/PowerShell/Announcements/issues/6");
script_xref(name:"URL", value:"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8356");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2018 Greenbone AG");
script_family("General");
script_dependencies("gb_powershell_core_detect_lin.nasl");
script_mandatory_keys("PowerShell/Linux/Ver");
exit(0);
}
include("version_func.inc");
include("host_details.inc");
if(!infos = get_app_version_and_location(cpe:CPE, exit_no_version:TRUE)) exit(0);
psVer = infos['version'];
psPath = infos['location'];
if(version_in_range(version:psVer, test_version:"6.0", test_version2:"6.0.2")){
fix = "6.0.3";
}
## 6.1.0-preview.4 = 6.1.0.4
else if(version_in_range(version:psVer, test_version:"6.1", test_version2:"6.1.0.3")){
fix = "6.1.0-preview.4";
}
if(fix)
{
report = report_fixed_ver(installed_version:psVer, fixed_version:fix, install_path:psPath);
security_message(data:report);
exit(0);
}
exit(0);
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
59.3%