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
EPSS
Percentile
68.8%
The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-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
# AlmaLinux Security Advisory ALSA-2023:4527.
##
include('compat.inc');
if (description)
{
script_id(179621);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/17");
script_cve_id("CVE-2023-2454", "CVE-2023-2455");
script_xref(name:"ALSA", value:"2023:4527");
script_xref(name:"IAVB", value:"2023-B-0034-S");
script_name(english:"AlmaLinux 8 : postgresql:13 (ALSA-2023:4527)");
script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-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://errata.almalinux.org/8/ALSA-2023-4527.html");
script_set_attribute(attribute:"solution", value:
"Update the affected 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_cwe_id(20);
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:"2023/08/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:pg_repack");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:pgaudit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgres-decoderbufs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-contrib");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-plperl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-plpython3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-pltcl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-server-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-test-rpm-macros");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-upgrade");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:postgresql-upgrade-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::appstream");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::baseos");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::highavailability");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::nfv");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::powertools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::realtime");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::resilientstorage");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::sap");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::sap_hana");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::supplementary");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Alma Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/AlmaLinux/release');
if (isnull(os_release) || 'AlmaLinux' >!< os_release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 8.x', 'AlmaLinux ' + os_ver);
if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);
var module_ver = get_kb_item('Host/AlmaLinux/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_el8.6.0+2760+1746ec94', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'pg_repack-1.4.6-3.module_el8.6.0+2760+1746ec94', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'pgaudit-1.5.0-1.module_el8.6.0+2760+1746ec94', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'pgaudit-1.5.0-1.module_el8.6.0+2760+1746ec94', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgres-decoderbufs-0.10.0-2.module_el8.6.0+2760+1746ec94', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgres-decoderbufs-0.10.0-2.module_el8.6.0+2760+1746ec94', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-contrib-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-contrib-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-docs-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-docs-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-plperl-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-plperl-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-plpython3-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-plpython3-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-pltcl-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-pltcl-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-server-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-server-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-server-devel-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-server-devel-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-static-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-static-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-test-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-test-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-test-rpm-macros-13.11-1.module_el8.8.0+3601+ca64e769', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-upgrade-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-upgrade-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-upgrade-devel-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'postgresql-upgrade-devel-13.11-1.module_el8.8.0+3601+ca64e769', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
]
};
var flag = 0;
var appstreams_found = 0;
foreach var 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/AlmaLinux/appstream/' + appstream_name);
}
if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
appstreams_found++;
foreach var 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;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'Alma-' + 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 && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
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 / postgresql / etc');
}