CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
68.8%
The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2023:4527 advisory.
schema_element defeats protective search_path changes; It was found that certain database calls in PostgreSQL could permit an authed attacker with elevated database-level privileges to execute arbitrary code. (CVE-2023-2454)
Row security policies disregard user ID changes after inlining; PostgreSQL could permit incorrect policies to be applied in certain cases where role-specific policies are used and a given query is planned under one role and then executed under other roles. This scenario can happen under security definer functions or when a common user and query is planned initially and then re-used across multiple SET ROLEs. Applying an incorrect policy may permit a user to complete otherwise-forbidden reads and modifications. This affects only databases that have used CREATE POLICY to define a row security policy. (CVE-2023-2455)
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
# Red Hat Security Advisory RHSA-2023:4527. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(179461);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/08");
script_cve_id("CVE-2023-2454", "CVE-2023-2455");
script_xref(name:"RHSA", value:"2023:4527");
script_name(english:"CentOS 8 : postgresql:13 (CESA-2023:4527)");
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-2023:4527 advisory.
- schema_element defeats protective search_path changes; It was found that certain database calls in
PostgreSQL could permit an authed attacker with elevated database-level privileges to execute arbitrary
code. (CVE-2023-2454)
- Row security policies disregard user ID changes after inlining; PostgreSQL could permit incorrect policies
to be applied in certain cases where role-specific policies are used and a given query is planned under
one role and then executed under other roles. This scenario can happen under security definer functions or
when a common user and query is planned initially and then re-used across multiple SET ROLEs. Applying an
incorrect policy may permit a user to complete otherwise-forbidden reads and modifications. This affects
only databases that have used CREATE POLICY to define a row security policy. (CVE-2023-2455)
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/errata/RHSA-2023:4527");
script_set_attribute(attribute:"solution", value:
"Update the affected pg_repack, pgaudit and / or postgres-decoderbufs packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C");
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: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-2023-2454");
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:"2023/05/11");
script_set_attribute(attribute:"patch_publication_date", value:"2023/08/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/08");
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:pg_repack");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:pgaudit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:postgres-decoderbufs");
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) 2023-2024 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 ('CentOS Stream' >< os_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);
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 module_ver = get_kb_item('Host/RedHat/appstream/postgresql');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module postgresql:13');
if ('13' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module postgresql:' + module_ver);
var appstreams = {
'postgresql:13': [
{'reference':'pg_repack-1.4.6-3.module_el8.5.0+842+bf20b04a', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'pg_repack-1.4.6-3.module_el8.5.0+842+bf20b04a', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'pgaudit-1.5.0-1.module_el8.4.0+598+6a753823', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'pgaudit-1.5.0-1.module_el8.4.0+598+6a753823', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgres-decoderbufs-0.10.0-2.module_el8.4.0+828+b906d54a', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgres-decoderbufs-0.10.0-2.module_el8.4.0+828+b906d54a', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
]
};
var flag = 0;
appstreams_found = 0;
foreach module (keys(appstreams)) {
var appstream = NULL;
var appstream_name = NULL;
var appstream_version = NULL;
var appstream_split = split(module, sep:':', keep:FALSE);
if (!empty_or_null(appstream_split)) {
appstream_name = appstream_split[0];
appstream_version = appstream_split[1];
if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/RedHat/appstream/' + appstream_name);
}
if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
appstreams_found++;
foreach package_array ( appstreams[module] ) {
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 (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module postgresql:13');
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
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, 'pg_repack / pgaudit / postgres-decoderbufs');
}
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
68.8%