CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
AI Score
Confidence
Low
EPSS
Percentile
13.8%
OpenBSD OpenSSH is prone to a remote code execution (RCE)
vulnerability.
# SPDX-FileCopyrightText: 2024 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:openbsd:openssh";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.114696");
script_version("2024-07-10T05:05:27+0000");
script_tag(name:"last_modification", value:"2024-07-10 05:05:27 +0000 (Wed, 10 Jul 2024)");
script_tag(name:"creation_date", value:"2024-07-09 07:11:01 +0000 (Tue, 09 Jul 2024)");
script_tag(name:"cvss_base", value:"7.6");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:C/I:C/A:C");
script_cve_id("CVE-2024-6409");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("OpenBSD OpenSSH 8.7p1 - 8.8p1 RCE Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2024 Greenbone AG");
script_family("General");
script_dependencies("gb_openssh_consolidation.nasl");
script_mandatory_keys("openssh/detected");
script_tag(name:"summary", value:"OpenBSD OpenSSH is prone to a remote code execution (RCE)
vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"There is a possible RCE in privsep child due to a race condition
in signal handling when call cleanup_exit() from grace_alarm_handler(). Please see the references
for more information.");
script_tag(name:"affected", value:"OpenBSD OpenSSH versions 8.7p1 through 8.8p1 when distribution
specific patches have been applied. Known affected distributions are RHEL 9 and Fedora 35 through
Fedora 37.");
script_tag(name:"solution", value:"Update to a newer OpenSSH version which doesn't make the
problematic cleanup_exit() call.");
script_xref(name:"URL", value:"http://www.openwall.com/lists/oss-security/2024/07/08/2");
script_xref(name:"URL", value:"https://access.redhat.com/security/cve/CVE-2024-6409");
script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2295085");
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);
version = infos["version"];
location = infos["location"];
if (version_in_range(version: version, test_version: "8.7p1", test_version2: "8.8p1")) {
report = report_fixed_ver(installed_version: version, fixed_version: "See references", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
AI Score
Confidence
Low
EPSS
Percentile
13.8%