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nessusThis script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.CENTOS9_RPM-4_16_1_3-26_41133.NASL
HistoryApr 26, 2024 - 12:00 a.m.

CentOS 9 : rpm-4.16.1.3-26.el9

2024-04-2600:00:00
This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
2
centos linux 9
rpm
vulnerabilities
race condition
symbolic link
incomplete fix
data confidentiality
integrity
system availability
nessus
security scanner

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

7.7 High

AI Score

Confidence

Low

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

36.7%

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the rpm-4.16.1.3-26.el9 build changelog.

  • 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)

  • 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)

  • 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)

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 package checks in this plugin were extracted from
# the CentOS Stream Build Service.
##

include('compat.inc');

if (description)
{
  script_id(193941);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/26");

  script_cve_id("CVE-2021-35937", "CVE-2021-35938", "CVE-2021-35939");

  script_name(english:"CentOS 9 : rpm-4.16.1.3-26.el9");

  script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates for python3-rpm.");
  script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
rpm-4.16.1.3-26.el9 build changelog.

  - 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)

  - 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)

  - 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)

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://kojihub.stream.centos.org/koji/buildinfo?buildID=41133");
  script_set_attribute(attribute:"solution", value:
"Update the CentOS 9 Stream python3-rpm package.");
  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:"2023/11/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/26");

  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:python3-rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-apidocs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-build");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-build-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-cron");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-audit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-fapolicyd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-ima");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-prioreset");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-selinux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-syslog");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-plugin-systemd-inhibit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-sign");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rpm-sign-libs");
  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':'python3-rpm-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-apidocs-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-build-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-build-libs-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-cron-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-devel-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-libs-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-audit-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-fapolicyd-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-ima-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-prioreset-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-selinux-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-syslog-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-systemd-inhibit-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-sign-4.16.1.3-26.el9', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-sign-libs-4.16.1.3-26.el9', 'release':'9', '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;
  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, 'python3-rpm / rpm / rpm-apidocs / rpm-build / rpm-build-libs / etc');
}
VendorProductVersionCPE
centoscentos9cpe:/a:centos:centos:9
centoscentospython3-rpmp-cpe:/a:centos:centos:python3-rpm
centoscentosrpmp-cpe:/a:centos:centos:rpm
centoscentosrpm-apidocsp-cpe:/a:centos:centos:rpm-apidocs
centoscentosrpm-buildp-cpe:/a:centos:centos:rpm-build
centoscentosrpm-build-libsp-cpe:/a:centos:centos:rpm-build-libs
centoscentosrpm-cronp-cpe:/a:centos:centos:rpm-cron
centoscentosrpm-develp-cpe:/a:centos:centos:rpm-devel
centoscentosrpm-libsp-cpe:/a:centos:centos:rpm-libs
centoscentosrpm-plugin-auditp-cpe:/a:centos:centos:rpm-plugin-audit
Rows per page:
1-10 of 181

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

7.7 High

AI Score

Confidence

Low

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

36.7%