7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.9 High
AI Score
Confidence
High
0.732 High
EPSS
Percentile
98.1%
The remote Red Hat Enterprise Linux CoreOS 4 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2023:5679 advisory.
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function. (CVE-2023-39325)
golang: net/http, x/net/http2: rapid stream resets can cause excessive work () (CVE-2023-44487)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2023:5679. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(189424);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/09");
script_cve_id("CVE-2023-39325", "CVE-2023-44487");
script_xref(name:"RHSA", value:"2023:5679");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/10/31");
script_xref(name:"CEA-ID", value:"CEA-2024-0004");
script_name(english:"RHCOS 4 : OpenShift Container Platform 4.12.39 (RHSA-2023:5679)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 4.12.39.");
script_set_attribute(attribute:"description", value:
"The remote Red Hat Enterprise Linux CoreOS 4 host has a package installed that is affected by multiple vulnerabilities
as referenced in the RHSA-2023:5679 advisory.
- A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive
server resource consumption. While the total number of requests is bounded by the
http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create
a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound
the number of simultaneously executing handler goroutines to the stream concurrency limit
(MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client
has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows
too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2
for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per
HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the
Server.MaxConcurrentStreams setting and the ConfigureServer function. (CVE-2023-39325)
- golang: net/http, x/net/http2: rapid stream resets can cause excessive work () (CVE-2023-44487)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2023-39325");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2023-44487");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2023:5679");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2243296");
script_set_attribute(attribute:"solution", value:
"Update the RHCOS OpenShift Container Platform 4.12.39 packages based on the guidance in RHSA-2023:5679.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-44487");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_cwe_id(400);
script_set_attribute(attribute:"vendor_severity", value:"Important");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/10/10");
script_set_attribute(attribute:"patch_publication_date", value:"2023/10/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8:coreos");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9:coreos");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openshift-hyperkube");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat CoreOS');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'eq', os_version: os_ver, rhel_version: '4.12')) audit(AUDIT_OS_NOT, 'Red Hat CoreOS 4.12', 'Red Hat CoreOS ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat CoreOS', cpu);
var pkgs = [
{'reference':'openshift-hyperkube-4.12.0-202310132326.p0.g20cda61.assembly.stream.el8', 'release':'4', 'el_string':'el8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openshift-hyperkube'},
{'reference':'openshift-hyperkube-4.12.0-202310132326.p0.g20cda61.assembly.stream.el9', 'release':'4', 'el_string':'el9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openshift-hyperkube'}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'RHCOS' + package_array['release'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (reference &&
_release &&
(!exists_check || rpm_exists(release:_release, rpm:exists_check)) &&
rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'openshift-hyperkube');
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | openshift-hyperkube | p-cpe:/a:redhat:enterprise_linux:openshift-hyperkube |
redhat | enterprise_linux | 8 | cpe:/o:redhat:enterprise_linux:8:coreos |
redhat | enterprise_linux | 9 | cpe:/o:redhat:enterprise_linux:9:coreos |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.9 High
AI Score
Confidence
High
0.732 High
EPSS
Percentile
98.1%