Amazon Linux AMI : mysql56 (ALAS-2021-1464)

##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2021-1464.
##

include('compat.inc');

if (description)
{
  script_id(145008);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/30");

  script_cve_id(
    "CVE-2020-14672",
    "CVE-2020-14765",
    "CVE-2020-14769",
    "CVE-2020-14793"
  );
  script_xref(name:"ALAS", value:"2021-1464");

  script_name(english:"Amazon Linux AMI : mysql56 (ALAS-2021-1464)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of mysql56 installed on the remote host is prior to 5.6.50-1.38. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS-2021-1464 advisory.

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Stored Procedure). Supported
    versions that are affected are 5.6.49 and prior, 5.7.31 and prior and 8.0.21 and prior. Easily exploitable
    vulnerability allows high privileged attacker with network access via multiple protocols to compromise
    MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability
    impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-14672)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: FTS). Supported versions
    that are affected are 5.6.49 and prior, 5.7.31 and prior and 8.0.21 and prior. Easily exploitable
    vulnerability allows low privileged attacker with network access via multiple protocols to compromise
    MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability
    impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-14765)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported
    versions that are affected are 5.6.49 and prior, 5.7.31 and prior and 8.0.21 and prior. Easily exploitable
    vulnerability allows low privileged attacker with network access via multiple protocols to compromise
    MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability
    impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-14769)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported
    versions that are affected are 5.6.49 and prior, 5.7.31 and prior and 8.0.21 and prior. Easily exploitable
    vulnerability allows high privileged attacker with network access via multiple protocols to compromise
    MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability
    impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-14793)

Note that Nessus has not tested for this issue 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/ALAS-2021-1464.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14672");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14765");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14769");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14793");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update mysql56' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/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:L/UI:N/S:U/C:N/I:N/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-2020-14765");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-14769");

  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:"2020/10/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/01/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/01/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-bench");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-embedded");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-embedded-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-errmsg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql56-test");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2024 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("audit.inc");
include("global_settings.inc");
include("rpm.inc");

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

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

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

pkgs = [
    {'reference':'mysql56-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-bench-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-bench-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-common-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-common-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-debuginfo-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-debuginfo-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-devel-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-devel-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-embedded-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-embedded-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-embedded-devel-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-embedded-devel-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-errmsg-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-errmsg-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-libs-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-libs-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-server-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-server-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql56-test-5.6.50-1.38.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql56-test-5.6.50-1.38.amzn1', 'cpu':'x86_64', 'release':'ALA'}
];

flag = 0;
foreach package_array ( pkgs ) {
  reference = NULL;
  release = NULL;
  cpu = NULL;
  el_string = NULL;
  rpm_spec_vers_cmp = NULL;
  allowmaj = 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['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['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (reference && release) {
    if (rpm_check(release:release, cpu:cpu, reference:reference, 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
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "mysql56 / mysql56-bench / mysql56-common / etc");
}