The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2019:1479 advisory.
Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service (CVE-2019-11477)
Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service (CVE-2019-11478)
kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service (CVE-2019-11479)
kernel: lack of check for mmap minimum address in expand_downwards in mm/mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms (CVE-2019-9213)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# Red Hat Security Advisory RHSA-2019:1479. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(145651);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/25");
script_cve_id(
"CVE-2019-9213",
"CVE-2019-11477",
"CVE-2019-11478",
"CVE-2019-11479"
);
script_bugtraq_id(
107296,
108798,
108801,
108818
);
script_xref(name:"RHSA", value:"2019:1479");
script_xref(name:"CEA-ID", value:"CEA-2019-0456");
script_name(english:"CentOS 8 : kernel (CESA-2019:1479)");
script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
CESA-2019:1479 advisory.
- Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service
(CVE-2019-11477)
- Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service
(CVE-2019-11478)
- kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of
service (CVE-2019-11479)
- kernel: lack of check for mmap minimum address in expand_downwards in mm/mmap.c leads to NULL pointer
dereferences exploit on non-SMAP platforms (CVE-2019-9213)
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://access.redhat.com/errata/RHSA-2019:1479");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
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-2019-11477");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2019-11479");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Reliable Datagram Sockets (RDS) rds_atomic_free_op NULL pointer dereference Privilege Escalation');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/05");
script_set_attribute(attribute:"patch_publication_date", value:"2019/06/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/01/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bpftool");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-abi-whitelists");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-cross-headers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug-modules-extra");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-headers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-modules-extra");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-tools-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-tools-libs-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:python3-perf");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CentOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list", "Host/cpu");
exit(0);
}
include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
include('rhel.inc');
include('ksplice.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item('Host/CentOS/release');
if (isnull(release) || 'CentOS' >!< release) audit(AUDIT_OS_NOT, 'CentOS');
os_ver = pregmatch(pattern: "CentOS(?: Stream)?(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS');
os_ver = os_ver[1];
if ('CentOS Stream' >< release) audit(AUDIT_OS_NOT, 'CentOS 8.x', 'CentOS Stream ' + os_ver);
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'CentOS 8.x', 'CentOS ' + os_ver);
if (!get_kb_item('Host/CentOS/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS', cpu);
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
rm_kb_item(name:'Host/uptrack-uname-r');
cve_list = make_list('CVE-2019-9213', 'CVE-2019-11477', 'CVE-2019-11478', 'CVE-2019-11479');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for CESA-2019:1479');
}
else
{
__rpm_report = ksplice_reporting_text();
}
}
pkgs = [
{'reference':'bpftool-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'bpftool-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-abi-whitelists-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-abi-whitelists-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-core-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-core-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-cross-headers-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-cross-headers-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-core-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-core-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-devel-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-devel-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-modules-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-modules-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-modules-extra-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debug-modules-extra-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-devel-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-devel-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-headers-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-headers-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-modules-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-modules-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-modules-extra-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-modules-extra-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-libs-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-libs-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-libs-devel-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-libs-devel-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'perf-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'perf-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-perf-4.18.0-80.4.2.el8_0', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-perf-4.18.0-80.4.2.el8_0', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
];
flag = 0;
foreach package_array ( pkgs ) {
reference = NULL;
release = NULL;
sp = NULL;
cpu = NULL;
el_string = NULL;
rpm_spec_vers_cmp = NULL;
epoch = NULL;
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_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bpftool / kernel / kernel-abi-whitelists / kernel-core / etc');
}