Amazon Linux AMI : mysql56 (ALAS-2020-1402)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2020-1402.
#

include('compat.inc');

if (description)
{
  script_id(139083);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/12");

  script_cve_id(
    "CVE-2020-2763",
    "CVE-2020-2780",
    "CVE-2020-2804",
    "CVE-2020-2812",
    "CVE-2020-2814"
  );
  script_xref(name:"ALAS", value:"2020-1402");

  script_name(english:"Amazon Linux AMI : mysql56 (ALAS-2020-1402)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Vulnerability in the MySQL Server product of Oracle MySQL (component:
Server: Replication). Supported versions that are affected are 5.6.47
and prior, 5.7.29 and prior and 8.0.19 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
3.0 Base Score 4.9 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-2763)

Vulnerability in the MySQL Server product of Oracle MySQL (component:
Server: DML). Supported versions that are affected are 5.6.47 and
prior, 5.7.29 and prior and 8.0.19 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
3.0 Base Score 6.5 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-2780)

Vulnerability in the MySQL Server product of Oracle MySQL (component:
Server: Memcached). Supported versions that are affected are 5.6.47
and prior, 5.7.29 and prior and 8.0.19 and prior. Difficult to exploit
vulnerability allows unauthenticated 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
3.0 Base Score 5.9 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-2804)

Vulnerability in the MySQL Server product of Oracle MySQL (component:
Server: Stored Procedure). Supported versions that are affected are
5.6.47 and prior, 5.7.29 and prior and 8.0.19 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 3.0 Base Score 4.9 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-2812)

Vulnerability in the MySQL Server product of Oracle MySQL (component:
InnoDB). Supported versions that are affected are 5.6.47 and prior,
5.7.28 and prior and 8.0.18 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
3.0 Base Score 4.9 (Availability impacts). CVSS Vector:
(CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). (CVE-2020-2814)");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2020-1402.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update mysql56' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  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-2020-2804");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-2780");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/30");

  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_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020-2022 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);


flag = 0;
if (rpm_check(release:"ALA", reference:"mysql56-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-bench-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-common-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-debuginfo-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-devel-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-embedded-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-embedded-devel-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-errmsg-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-libs-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-server-5.6.49-1.37.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"mysql56-test-5.6.49-1.37.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  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 / mysql56-debuginfo / etc");
}