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nessusThis script is Copyright (C) 2018 Tenable Network Security, Inc.ALA_ALAS-2018-955.NASL
HistoryFeb 22, 2018 - 12:00 a.m.

Amazon Linux AMI : 389-ds-base (ALAS-2018-955)

2018-02-2200:00:00
This script is Copyright (C) 2018 Tenable Network Security, Inc.
www.tenable.com
18

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.018 Low

EPSS

Percentile

88.2%

Remote DoS via search filters in slapi_filter_sprintf in slapd/util.c

A stack buffer overflow flaw was found in the way 389-ds-base handled certain LDAP search filters. A remote, unauthenticated attacker could potentially use this flaw to make ns-slapd crash via a specially crafted LDAP request, thus resulting in denial of service.(CVE-2017-15134)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2018-955.
#

include("compat.inc");

if (description)
{
  script_id(106932);
  script_version("3.4");
  script_cvs_date("Date: 2018/04/18 15:09:36");

  script_cve_id("CVE-2017-15134");
  script_xref(name:"ALAS", value:"2018-955");

  script_name(english:"Amazon Linux AMI : 389-ds-base (ALAS-2018-955)");
  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:
"Remote DoS via search filters in slapi_filter_sprintf in slapd/util.c

A stack buffer overflow flaw was found in the way 389-ds-base handled
certain LDAP search filters. A remote, unauthenticated attacker could
potentially use this flaw to make ns-slapd crash via a specially
crafted LDAP request, thus resulting in denial of
service.(CVE-2017-15134)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2018-955.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update 389-ds-base' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:389-ds-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:389-ds-base-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:389-ds-base-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:389-ds-base-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:389-ds-base-snmp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 Tenable Network Security, Inc.");
  script_family(english:"Amazon Linux Local Security Checks");

  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:"389-ds-base-1.3.6.1-26.52.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"389-ds-base-debuginfo-1.3.6.1-26.52.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"389-ds-base-devel-1.3.6.1-26.52.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"389-ds-base-libs-1.3.6.1-26.52.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"389-ds-base-snmp-1.3.6.1-26.52.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, "389-ds-base / 389-ds-base-debuginfo / 389-ds-base-devel / etc");
}
VendorProductVersionCPE
amazonlinuxcpe:/o:amazon:linux
amazonlinux389-ds-basep-cpe:/a:amazon:linux:389-ds-base
amazonlinux389-ds-base-debuginfop-cpe:/a:amazon:linux:389-ds-base-debuginfo
amazonlinux389-ds-base-develp-cpe:/a:amazon:linux:389-ds-base-devel
amazonlinux389-ds-base-libsp-cpe:/a:amazon:linux:389-ds-base-libs
amazonlinux389-ds-base-snmpp-cpe:/a:amazon:linux:389-ds-base-snmp

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.018 Low

EPSS

Percentile

88.2%