Amazon Linux AMI : mysql57 (ALAS-2020-1439)

##
# (C) Tenable Network Security, Inc.
#                                  
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2020-1439.
##

include('compat.inc');

if (description)
{
  script_id(141981);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/28");

  script_cve_id(
    "CVE-2020-14539",
    "CVE-2020-14540",
    "CVE-2020-14547",
    "CVE-2020-14550",
    "CVE-2020-14553",
    "CVE-2020-14559",
    "CVE-2020-14576"
  );
  script_xref(name:"ALAS", value:"2020-1439");

  script_name(english:"Amazon Linux AMI : mysql57 (ALAS-2020-1439)");
  script_summary(english:"Checks rpm output for the updated packages");

  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 tested product installed on the remote host is prior to tested version. It is, therefore, affected by
multiple vulnerabilities as referenced in the ALAS-2020-1439 advisory.

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported
    versions that are affected are 5.6.48 and prior, 5.7.30 and prior and 8.0.20 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-2020-14539)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions
    that are affected are 5.7.30 and prior and 8.0.20 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-2020-14540)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported
    versions that are affected are 5.7.30 and prior and 8.0.20 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-2020-14547)

  - Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are
    affected are 5.6.48 and prior, 5.7.30 and prior and 8.0.20 and prior. Difficult to exploit vulnerability
    allows low privileged attacker with network access via multiple protocols to compromise MySQL Client.
    Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently
    repeatable crash (complete DOS) of MySQL Client. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS
    Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-14550)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Pluggable Auth). Supported
    versions that are affected are 5.7.30 and prior and 8.0.20 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 update, insert or delete access to
    some of MySQL Server accessible data. CVSS 3.1 Base Score 4.3 (Integrity impacts). CVSS Vector:
    (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N). (CVE-2020-14553)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Information Schema).
    Supported versions that are affected are 5.6.48 and prior, 5.7.30 and prior and 8.0.20 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 read access
    to a subset of MySQL Server accessible data. CVSS 3.1 Base Score 4.3 (Confidentiality impacts). CVSS
    Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). (CVE-2020-14559)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: UDF). Supported versions
    that are affected are 5.7.30 and prior and 8.0.20 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-2020-14576)

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-2020-1439.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14539");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14540");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14547");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14550");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14553");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14559");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-14576");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update mysql57' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N");
  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:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-14559");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/10/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/10/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-embedded");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-embedded-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-errmsg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mysql57-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) 2020 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':'mysql57-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-common-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-common-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-debuginfo-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-debuginfo-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-devel-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-devel-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-embedded-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-embedded-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-embedded-devel-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-embedded-devel-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-errmsg-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-errmsg-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-libs-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-libs-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-server-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-server-5.7.31-1.16.amzn1', 'cpu':'x86_64', 'release':'ALA'},
    {'reference':'mysql57-test-5.7.31-1.16.amzn1', 'cpu':'i686', 'release':'ALA'},
    {'reference':'mysql57-test-5.7.31-1.16.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, "mysql57 / mysql57-common / mysql57-debuginfo / etc");
}