Amazon Linux 2 : php (ALASPHP8.2-2023-002)

2023-09-1300:00:00

www.tenable.com

amazon linux 2

php

version 8.2.9-1

vulnerabilities

soap

xml

libxml

stack buffer overflow

rce

nessus

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

8.6

Confidence

Low

EPSS

0.001

Percentile

49.5%

JSON

The version of php installed on the remote host is prior to 8.2.9-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2PHP8.2-2023-002 advisory.

In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, 8.2.* before 8.2.7 when using SOAP HTTP Digest Authentication, random value generator was not checked for failure, and was using narrower range of values than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of uninitialized memory from the client to the server, and it also made easier to a malicious server to guess the client’s nonce. (CVE-2023-3247)
In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded.
This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down. (CVE-2023-3823)
In PHP version 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file, while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow, leading potentially to memory corruption or RCE. (CVE-2023-3824)

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 Amazon Linux 2 Security Advisory ALASPHP8.2-2023-002.
##

include('compat.inc');

if (description)
{
  script_id(181388);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/07");

  script_cve_id("CVE-2023-3247", "CVE-2023-3823", "CVE-2023-3824");
  script_xref(name:"IAVA", value:"2023-A-0321-S");
  script_xref(name:"IAVA", value:"2023-A-0423-S");

  script_name(english:"Amazon Linux 2 : php (ALASPHP8.2-2023-002)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of php installed on the remote host is prior to 8.2.9-1. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS2PHP8.2-2023-002 advisory.

  - In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, 8.2.* before 8.2.7 when using SOAP HTTP Digest
    Authentication, random value generator was not checked for failure, and was using narrower range of values
    than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of
    uninitialized memory from the client to the server, and it also made easier to a malicious server to guess
    the client's nonce. (CVE-2023-3247)

  - In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions
    rely on libxml global state to track configuration variables, like whether external entities are loaded.
    This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate
    function. However, since the state is process-global, other modules - such as ImageMagick - may also use
    this library within the same process, and change that global state for their internal purposes, and leave
    it in a state where external entities loading is enabled. This can lead to the situation where external
    XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to
    PHP. This vulnerable state may persist in the same process across many requests, until the process is shut
    down. (CVE-2023-3823)

  - In PHP version 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file,
    while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow,
    leading potentially to memory corruption or RCE. (CVE-2023-3824)

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://alas.aws.amazon.com/AL2/ALASPHP8.2-2023-002.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-3247.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-3823.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-3824.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update php' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/AC:L/PR:N/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-2023-3824");

  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:"2023/06/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/09/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-bcmath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-cli");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-dba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-embedded");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-enchant");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-fpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-gd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-gmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-intl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-mbstring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-mysqlnd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-opcache");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-pdo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-process");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-pspell");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-soap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-sodium");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:php-xml");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
  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:"Amazon Linux 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/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'php-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-bcmath-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-bcmath-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-cli-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-cli-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-common-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-common-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-dba-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-dba-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-dbg-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-dbg-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-debuginfo-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-debuginfo-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-devel-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-devel-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-embedded-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-embedded-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-enchant-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-enchant-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-fpm-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-fpm-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-gd-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-gd-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-gmp-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-gmp-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-intl-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-intl-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-ldap-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-ldap-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-mbstring-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-mbstring-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-mysqlnd-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-mysqlnd-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-odbc-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-odbc-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-opcache-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-opcache-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-pdo-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-pdo-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-pgsql-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-pgsql-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-process-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-process-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-pspell-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-pspell-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-snmp-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-snmp-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-soap-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-soap-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-sodium-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-sodium-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-xml-8.2.9-1.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'},
    {'reference':'php-xml-8.2.9-1.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'php8.2'}
];

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 = 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 (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, "php / php-bcmath / php-cli / etc");
}