The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4829 advisory.
jenkins: FilePath#mkdirs does not check permission to create parent directories (CVE-2021-21685)
jenkins: File path filters do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories (CVE-2021-21686)
jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic link (CVE-2021-21687)
jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have unrestricted read access (CVE-2021-21688)
jenkins: FilePath#unzip and FilePath#untar were not subject to any access control (CVE-2021-21689)
jenkins: Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path (CVE-2021-21690)
jenkins: Creating symbolic links is possible without the symlink permission (CVE-2021-21691)
jenkins: The operations FilePath#renameTo and FilePath#moveAllChildrenTo only check read permission on the source path (CVE-2021-21692)
jenkins: When creating temporary files, permission to create files is only checked after they’ve been created. (CVE-2021-21693)
jenkins: FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace do not check any permissions (CVE-2021-21694)
jenkins: FilePath#listFiles lists files outside directories with agent read access when following symbolic links. (CVE-2021-21695)
jenkins: Agent-to-controller access control allowed writing to sensitive directory used by Pipeline:
Shared Groovy Libraries Plugin (CVE-2021-21696)
jenkins: Agent-to-controller access control allows reading/writing most content of build directories (CVE-2021-21697)
jenkins-2-plugins/subversion: does not restrict the name of a file when looking up a subversion key (CVE-2021-21698)
coreos-installer: restrict access permissions on /boot/ignition{,/config.ign} (CVE-2021-3917)
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 70300
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:4829. The text
# itself is copyright (C) Red Hat, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(155755);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/23");
script_cve_id(
"CVE-2021-3917",
"CVE-2021-21685",
"CVE-2021-21686",
"CVE-2021-21687",
"CVE-2021-21688",
"CVE-2021-21689",
"CVE-2021-21690",
"CVE-2021-21691",
"CVE-2021-21692",
"CVE-2021-21693",
"CVE-2021-21694",
"CVE-2021-21695",
"CVE-2021-21696",
"CVE-2021-21697",
"CVE-2021-21698"
);
script_xref(name:"RHSA", value:"2021:4829");
script_xref(name:"IAVA", value:"2021-A-0551-S");
script_name(english:"RHEL 8 : OpenShift Container Platform 4.8.22 (RHSA-2021:4829)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2021:4829 advisory.
- jenkins: FilePath#mkdirs does not check permission to create parent directories (CVE-2021-21685)
- jenkins: File path filters do not canonicalize paths, allowing operations to follow symbolic links to
outside allowed directories (CVE-2021-21686)
- jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic
link (CVE-2021-21687)
- jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have unrestricted
read access (CVE-2021-21688)
- jenkins: FilePath#unzip and FilePath#untar were not subject to any access control (CVE-2021-21689)
- jenkins: Agent processes are able to completely bypass file path filtering by wrapping the file operation
in an agent file path (CVE-2021-21690)
- jenkins: Creating symbolic links is possible without the symlink permission (CVE-2021-21691)
- jenkins: The operations FilePath#renameTo and FilePath#moveAllChildrenTo only check read permission on the
source path (CVE-2021-21692)
- jenkins: When creating temporary files, permission to create files is only checked after they've been
created. (CVE-2021-21693)
- jenkins: FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and
FilePath#get*DiskSpace do not check any permissions (CVE-2021-21694)
- jenkins: FilePath#listFiles lists files outside directories with agent read access when following symbolic
links. (CVE-2021-21695)
- jenkins: Agent-to-controller access control allowed writing to sensitive directory used by Pipeline:
Shared Groovy Libraries Plugin (CVE-2021-21696)
- jenkins: Agent-to-controller access control allows reading/writing most content of build directories
(CVE-2021-21697)
- jenkins-2-plugins/subversion: does not restrict the name of a file when looking up a subversion key
(CVE-2021-21698)
- coreos-installer: restrict access permissions on /boot/ignition{,/config.ign} (CVE-2021-3917)
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-2021-3917");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21685");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21686");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21687");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21688");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21689");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21690");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21691");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21692");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21693");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21694");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21695");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21696");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21697");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-21698");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:4829");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2018478");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020322");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020323");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020324");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020327");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020335");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020336");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020338");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020339");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020341");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020342");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020343");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020344");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020345");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/2020385");
script_set_attribute(attribute:"solution", value:
"Update the affected coreos-installer, jenkins and / or jenkins-2-plugins packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
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:H/I:H/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-2021-21696");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(22, 59, 276, 281, 863);
script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/04");
script_set_attribute(attribute:"patch_publication_date", value:"2021/11/30");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/01");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:coreos-installer");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:jenkins");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:jenkins-2-plugins");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 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: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
'repo_relative_urls': [
'content/dist/layered/rhel8/s390x/rhocp/4.8/debug',
'content/dist/layered/rhel8/s390x/rhocp/4.8/os',
'content/dist/layered/rhel8/s390x/rhocp/4.8/source/SRPMS',
'content/dist/layered/rhel8/x86_64/rhocp/4.8/debug',
'content/dist/layered/rhel8/x86_64/rhocp/4.8/os',
'content/dist/layered/rhel8/x86_64/rhocp/4.8/source/SRPMS'
],
'pkgs': [
{'reference':'coreos-installer-0.9.0-8.rhaos4.8.el8', 'cpu':'s390x', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openshift-hyperkube'},
{'reference':'coreos-installer-0.9.0-8.rhaos4.8.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openshift-hyperkube'},
{'reference':'jenkins-2-plugins-4.8.1637599935-1.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openshift-hyperkube'},
{'reference':'jenkins-2.303.3.1637596565-1.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'openshift-hyperkube'}
]
}
];
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;
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 (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)) flag++;
}
}
if (flag)
{
var extra = NULL;
if (empty_or_null(applicable_repo_urls)) extra = rpm_report_get() + redhat_report_repo_caveat();
else extra = rpm_report_get() + redhat_report_package_caveat();
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, 'coreos-installer / jenkins / jenkins-2-plugins');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21685
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21686
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21687
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21688
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21689
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21690
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21691
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21692
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21693
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21694
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21695
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21696
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21697
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21698
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3917
access.redhat.com/errata/RHSA-2021:4829
access.redhat.com/security/cve/CVE-2021-21685
access.redhat.com/security/cve/CVE-2021-21686
access.redhat.com/security/cve/CVE-2021-21687
access.redhat.com/security/cve/CVE-2021-21688
access.redhat.com/security/cve/CVE-2021-21689
access.redhat.com/security/cve/CVE-2021-21690
access.redhat.com/security/cve/CVE-2021-21691
access.redhat.com/security/cve/CVE-2021-21692
access.redhat.com/security/cve/CVE-2021-21693
access.redhat.com/security/cve/CVE-2021-21694
access.redhat.com/security/cve/CVE-2021-21695
access.redhat.com/security/cve/CVE-2021-21696
access.redhat.com/security/cve/CVE-2021-21697
access.redhat.com/security/cve/CVE-2021-21698
access.redhat.com/security/cve/CVE-2021-3917
bugzilla.redhat.com/2018478
bugzilla.redhat.com/2020322
bugzilla.redhat.com/2020323
bugzilla.redhat.com/2020324
bugzilla.redhat.com/2020327
bugzilla.redhat.com/2020335
bugzilla.redhat.com/2020336
bugzilla.redhat.com/2020338
bugzilla.redhat.com/2020339
bugzilla.redhat.com/2020341
bugzilla.redhat.com/2020342
bugzilla.redhat.com/2020343
bugzilla.redhat.com/2020344
bugzilla.redhat.com/2020345
bugzilla.redhat.com/2020385