4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
6.8 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
6.4 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.8%
The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the dhcp-4.4.2-17.b1.el9 build changelog.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# the CentOS Stream Build Service.
##
include('compat.inc');
if (description)
{
script_id(191267);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/26");
script_cve_id("CVE-2021-25220");
script_name(english:"CentOS 9 : dhcp-4.4.2-17.b1.el9");
script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing a security update for dhcp-client.");
script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the
dhcp-4.4.2-17.b1.el9 build changelog.
- BIND 9.11.0 -> 9.11.36 9.12.0 -> 9.16.26 9.17.0 -> 9.18.0 BIND Supported Preview Editions: 9.11.4-S1 ->
9.11.36-S1 9.16.8-S1 -> 9.16.26-S1 Versions of BIND 9 earlier than those shown - back to 9.1.0, including
Supported Preview Editions - are also believed to be affected but have not been tested as they are EOL.
The cache could become poisoned with incorrect records leading to queries being made to the wrong servers,
which might also result in false information being returned to clients. (CVE-2021-25220)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://kojihub.stream.centos.org/koji/buildinfo?buildID=20114");
script_set_attribute(attribute:"solution", value:
"Update the CentOS 9 Stream dhcp-client package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N");
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:H/UI:N/S:C/C:N/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-25220");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/03/16");
script_set_attribute(attribute:"patch_publication_date", value:"2022/05/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:centos:centos:9");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-devel-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-libs-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-relay");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:dhcp-server");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CentOS 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/CentOS/release", "Host/CentOS/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/CentOS/release');
if (isnull(os_release) || 'CentOS' >!< os_release) audit(AUDIT_OS_NOT, 'CentOS');
var os_ver = pregmatch(pattern: "CentOS(?: Stream)?(?: Linux)? release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '9')) audit(AUDIT_OS_NOT, 'CentOS 9.x', 'CentOS ' + os_ver);
if (!get_kb_item('Host/CentOS/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, 'CentOS', cpu);
var pkgs = [
{'reference':'dhcp-client-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
{'reference':'dhcp-common-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
{'reference':'dhcp-devel-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
{'reference':'dhcp-devel-doc-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
{'reference':'dhcp-libs-static-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
{'reference':'dhcp-relay-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'},
{'reference':'dhcp-server-4.4.2-17.b1.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'epoch':'12'}
];
var flag = 0;
foreach var package_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;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'CentOS-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
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 (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && _release) {
if (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)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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, 'dhcp-client / dhcp-common / dhcp-devel / dhcp-devel-doc / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
centos | centos | 9 | cpe:/a:centos:centos:9 |
centos | centos | dhcp-client | p-cpe:/a:centos:centos:dhcp-client |
centos | centos | dhcp-common | p-cpe:/a:centos:centos:dhcp-common |
centos | centos | dhcp-devel | p-cpe:/a:centos:centos:dhcp-devel |
centos | centos | dhcp-devel-doc | p-cpe:/a:centos:centos:dhcp-devel-doc |
centos | centos | dhcp-libs-static | p-cpe:/a:centos:centos:dhcp-libs-static |
centos | centos | dhcp-relay | p-cpe:/a:centos:centos:dhcp-relay |
centos | centos | dhcp-server | p-cpe:/a:centos:centos:dhcp-server |
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
6.8 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
6.4 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.8%