7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.4 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
36.7%
The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-0647 advisory.
A race condition vulnerability was found in rpm. A local unprivileged user could use this flaw to bypass the checks that were introduced in response to CVE-2017-7500 and CVE-2017-7501, potentially gaining root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-35937)
It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-35939)
A symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials after installing a file. A local unprivileged user could use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
(CVE-2021-35938)
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 Oracle Linux Security Advisory ELSA-2024-0647.
##
include('compat.inc');
if (description)
{
script_id(189921);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/02");
script_cve_id("CVE-2021-35937", "CVE-2021-35938", "CVE-2021-35939");
script_name(english:"Oracle Linux 8 : rpm (ELSA-2024-0647)");
script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2024-0647 advisory.
- A race condition vulnerability was found in rpm. A local unprivileged user could use this flaw to bypass
the checks that were introduced in response to CVE-2017-7500 and CVE-2017-7501, potentially gaining root
privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as
system availability. (CVE-2021-35937)
- It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only
implemented for the parent directory of the file to be created. A local unprivileged user who owns another
ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this
vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-35939)
- A symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials
after installing a file. A local unprivileged user could use this flaw to exchange the original file with
a symbolic link to a security-critical file and escalate their privileges on the system. The highest
threat from this vulnerability is to data confidentiality and integrity as well as system availability.
(CVE-2021-35938)
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://linux.oracle.com/errata/ELSA-2024-0647.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-35939");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/08/25");
script_set_attribute(attribute:"patch_publication_date", value:"2024/02/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/01");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:8::appstream");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8:9:baseos_patch");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8::baseos_latest");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-rpm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-apidocs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-build");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-build-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-cron");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-plugin-fapolicyd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-plugin-ima");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-plugin-prioreset");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-plugin-selinux");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-plugin-syslog");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-plugin-systemd-inhibit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rpm-sign");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Oracle Linux 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/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
var pkgs = [
{'reference':'python3-rpm-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-apidocs-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-build-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-build-libs-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-cron-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-devel-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-libs-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-fapolicyd-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-ima-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-prioreset-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-selinux-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-syslog-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-systemd-inhibit-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-sign-4.14.3-28.0.2.el8_9', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-build-libs-4.14.3-28.0.2.el8_9', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-devel-4.14.3-28.0.2.el8_9', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-libs-4.14.3-28.0.2.el8_9', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-rpm-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-apidocs-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-build-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-build-libs-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-cron-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-devel-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-libs-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-fapolicyd-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-ima-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-prioreset-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-selinux-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-syslog-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-plugin-systemd-inhibit-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rpm-sign-4.14.3-28.0.2.el8_9', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
];
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;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'EL' + 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 (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release) {
if (exists_check) {
if (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++;
} else {
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, 'python3-rpm / rpm / rpm-apidocs / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
oracle | linux | 8 | cpe:/a:oracle:linux:8::appstream |
oracle | linux | 8 | cpe:/o:oracle:linux:8 |
oracle | linux | 8 | cpe:/o:oracle:linux:8:9:baseos_patch |
oracle | linux | 8 | cpe:/o:oracle:linux:8::baseos_latest |
oracle | linux | python3-rpm | p-cpe:/a:oracle:linux:python3-rpm |
oracle | linux | rpm | p-cpe:/a:oracle:linux:rpm |
oracle | linux | rpm-apidocs | p-cpe:/a:oracle:linux:rpm-apidocs |
oracle | linux | rpm-build | p-cpe:/a:oracle:linux:rpm-build |
oracle | linux | rpm-build-libs | p-cpe:/a:oracle:linux:rpm-build-libs |
oracle | linux | rpm-cron | p-cpe:/a:oracle:linux:rpm-cron |
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.4 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
36.7%