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
9.7 High
AI Score
Confidence
High
0.732 High
EPSS
Percentile
98.1%
The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2024:2368 advisory.
The mod_http2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on top of libnghttp2 for httpd 2.4 servers.
Security Fix(es):
* httpd: mod_http2: DoS in HTTP/2 with initial window size 0 (CVE-2023-43622)
* mod_http2: reset requests exhaust memory (incomplete fix of CVE-2023-44487) (CVE-2023-45802)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.4 Release Notes linked from the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
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-2024:2368. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(194802);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");
script_cve_id("CVE-2023-43622", "CVE-2023-45802");
script_xref(name:"RHSA", value:"2024:2368");
script_name(english:"RHEL 9 : mod_http2 (RHSA-2024:2368)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for mod_http2.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as
referenced in the RHSA-2024:2368 advisory.
The mod_http2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on top of libnghttp2 for httpd
2.4 servers.
Security Fix(es):
* httpd: mod_http2: DoS in HTTP/2 with initial window size 0 (CVE-2023-43622)
* mod_http2: reset requests exhaust memory (incomplete fix of CVE-2023-44487) (CVE-2023-45802)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.4 Release Notes
linked from the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
# https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_2368.json
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d4a78f8e");
# https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.4_release_notes/index
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d922e0bf");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2243877");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2245153");
script_set_attribute(attribute:"see_also", value:"https://issues.redhat.com/browse/RHEL-14691");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:2368");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
script_set_attribute(attribute:"solution", value:
"Update the RHEL mod_http2 package based on the guidance in RHSA-2024:2368.");
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:U/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:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-43622");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(400);
script_set_attribute(attribute:"vendor_severity", value:"Moderate");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/10/19");
script_set_attribute(attribute:"patch_publication_date", value:"2024/04/30");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/30");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mod_http2");
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", "redhat_repos.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');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '9')) audit(AUDIT_OS_NOT, 'Red Hat 9.x', 'Red Hat ' + 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', cpu);
var constraints = [
{
'repo_relative_urls': [
'content/dist/rhel9/9.1/aarch64/appstream/debug',
'content/dist/rhel9/9.1/aarch64/appstream/os',
'content/dist/rhel9/9.1/aarch64/appstream/source/SRPMS',
'content/dist/rhel9/9.1/ppc64le/appstream/debug',
'content/dist/rhel9/9.1/ppc64le/appstream/os',
'content/dist/rhel9/9.1/ppc64le/appstream/source/SRPMS',
'content/dist/rhel9/9.1/s390x/appstream/debug',
'content/dist/rhel9/9.1/s390x/appstream/os',
'content/dist/rhel9/9.1/s390x/appstream/source/SRPMS',
'content/dist/rhel9/9.1/x86_64/appstream/debug',
'content/dist/rhel9/9.1/x86_64/appstream/os',
'content/dist/rhel9/9.1/x86_64/appstream/source/SRPMS',
'content/dist/rhel9/9.2/aarch64/appstream/debug',
'content/dist/rhel9/9.2/aarch64/appstream/os',
'content/dist/rhel9/9.2/aarch64/appstream/source/SRPMS',
'content/dist/rhel9/9.2/ppc64le/appstream/debug',
'content/dist/rhel9/9.2/ppc64le/appstream/os',
'content/dist/rhel9/9.2/ppc64le/appstream/source/SRPMS',
'content/dist/rhel9/9.2/s390x/appstream/debug',
'content/dist/rhel9/9.2/s390x/appstream/os',
'content/dist/rhel9/9.2/s390x/appstream/source/SRPMS',
'content/dist/rhel9/9.2/x86_64/appstream/debug',
'content/dist/rhel9/9.2/x86_64/appstream/os',
'content/dist/rhel9/9.2/x86_64/appstream/source/SRPMS',
'content/dist/rhel9/9.3/aarch64/appstream/debug',
'content/dist/rhel9/9.3/aarch64/appstream/os',
'content/dist/rhel9/9.3/aarch64/appstream/source/SRPMS',
'content/dist/rhel9/9.3/ppc64le/appstream/debug',
'content/dist/rhel9/9.3/ppc64le/appstream/os',
'content/dist/rhel9/9.3/ppc64le/appstream/source/SRPMS',
'content/dist/rhel9/9.3/s390x/appstream/debug',
'content/dist/rhel9/9.3/s390x/appstream/os',
'content/dist/rhel9/9.3/s390x/appstream/source/SRPMS',
'content/dist/rhel9/9.3/x86_64/appstream/debug',
'content/dist/rhel9/9.3/x86_64/appstream/os',
'content/dist/rhel9/9.3/x86_64/appstream/source/SRPMS',
'content/dist/rhel9/9.4/aarch64/appstream/debug',
'content/dist/rhel9/9.4/aarch64/appstream/os',
'content/dist/rhel9/9.4/aarch64/appstream/source/SRPMS',
'content/dist/rhel9/9.4/ppc64le/appstream/debug',
'content/dist/rhel9/9.4/ppc64le/appstream/os',
'content/dist/rhel9/9.4/ppc64le/appstream/source/SRPMS',
'content/dist/rhel9/9.4/s390x/appstream/debug',
'content/dist/rhel9/9.4/s390x/appstream/os',
'content/dist/rhel9/9.4/s390x/appstream/source/SRPMS',
'content/dist/rhel9/9.4/x86_64/appstream/debug',
'content/dist/rhel9/9.4/x86_64/appstream/os',
'content/dist/rhel9/9.4/x86_64/appstream/source/SRPMS',
'content/dist/rhel9/9/aarch64/appstream/debug',
'content/dist/rhel9/9/aarch64/appstream/os',
'content/dist/rhel9/9/aarch64/appstream/source/SRPMS',
'content/dist/rhel9/9/ppc64le/appstream/debug',
'content/dist/rhel9/9/ppc64le/appstream/os',
'content/dist/rhel9/9/ppc64le/appstream/source/SRPMS',
'content/dist/rhel9/9/s390x/appstream/debug',
'content/dist/rhel9/9/s390x/appstream/os',
'content/dist/rhel9/9/s390x/appstream/source/SRPMS',
'content/dist/rhel9/9/x86_64/appstream/debug',
'content/dist/rhel9/9/x86_64/appstream/os',
'content/dist/rhel9/9/x86_64/appstream/source/SRPMS'
],
'pkgs': [
{'reference':'mod_http2-2.0.26-1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE}
]
}
];
var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);
var flag = 0;
foreach var constraint_array ( constraints ) {
var repo_relative_urls = NULL;
if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
foreach var pkg ( constraint_array['pkgs'] ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = NULL;
var cves = NULL;
if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
if (reference &&
_release &&
rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
(applicable_repo_urls || (!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, allowmaj:allowmaj, cves:cves)) flag++;
}
}
if (flag)
{
var extra = NULL;
if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
else extra = rpm_report_get();
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : extra
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'mod_http2');
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | mod_http2 | p-cpe:/a:redhat:enterprise_linux:mod_http2 |
redhat | enterprise_linux | 9 | cpe:/o:redhat:enterprise_linux:9 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43622
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45802
www.nessus.org/u?d4a78f8e
www.nessus.org/u?d922e0bf
access.redhat.com/errata/RHSA-2024:2368
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=2243877
bugzilla.redhat.com/show_bug.cgi?id=2245153
issues.redhat.com/browse/RHEL-14691
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
9.7 High
AI Score
Confidence
High
0.732 High
EPSS
Percentile
98.1%