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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.EULEROS_SA-2021-1250.NASL
HistoryFeb 05, 2021 - 12:00 a.m.

EulerOS 2.0 SP9 : openldap (EulerOS-SA-2021-1250)

2021-02-0500:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
9

8.1 High

AI Score

Confidence

High

According to the versions of the openldap packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  • An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).(CVE-2020-36221)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo validation, resulting in denial of service.(CVE-2020-36222)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Values Return Filter control handling, resulting in denial of service (double free and out-of-bounds read).(CVE-2020-36223)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the saslAuthzTo processing, resulting in denial of service.(CVE-2020-36224)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading to a double free and slapd crash in the saslAuthzTo processing, resulting in denial of service.(CVE-2020-36225)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.(CVE-2020-36226)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.(CVE-2020-36227)

  • An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.(CVE-2020-36228)

  • A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.(CVE-2020-36229)

  • A flaw was discovered in OpenLDAP before 2.4.57 leading in an assertion failure in slapd in the X.509 DN parsing in decode.c ber_next_element, resulting in denial of service.(CVE-2020-36230)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(146229);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/23");

  script_cve_id(
    "CVE-2020-36221",
    "CVE-2020-36222",
    "CVE-2020-36223",
    "CVE-2020-36224",
    "CVE-2020-36225",
    "CVE-2020-36226",
    "CVE-2020-36227",
    "CVE-2020-36228",
    "CVE-2020-36229",
    "CVE-2020-36230"
  );
  script_xref(name:"IAVB", value:"2021-B-0014");

  script_name(english:"EulerOS 2.0 SP9 : openldap (EulerOS-SA-2021-1250)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the openldap packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

  - An integer underflow was discovered in OpenLDAP before
    2.4.57 leading to slapd crashes in the Certificate
    Exact Assertion processing, resulting in denial of
    service (schema_init.c
    serialNumberAndIssuerCheck).(CVE-2020-36221)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    to an assertion failure in slapd in the saslAuthzTo
    validation, resulting in denial of
    service.(CVE-2020-36222)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    to a slapd crash in the Values Return Filter control
    handling, resulting in denial of service (double free
    and out-of-bounds read).(CVE-2020-36223)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    to an invalid pointer free and slapd crash in the
    saslAuthzTo processing, resulting in denial of
    service.(CVE-2020-36224)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    to a double free and slapd crash in the saslAuthzTo
    processing, resulting in denial of
    service.(CVE-2020-36225)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    to a memch->bv_len miscalculation and slapd crash in
    the saslAuthzTo processing, resulting in denial of
    service.(CVE-2020-36226)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    to an infinite loop in slapd with the cancel_extop
    Cancel operation, resulting in denial of
    service.(CVE-2020-36227)

  - An integer underflow was discovered in OpenLDAP before
    2.4.57 leading to a slapd crash in the Certificate List
    Exact Assertion processing, resulting in denial of
    service.(CVE-2020-36228)

  - A flaw was discovered in ldap_X509dn2bv in OpenLDAP
    before 2.4.57 leading to a slapd crash in the X.509 DN
    parsing in ad_keystring, resulting in denial of
    service.(CVE-2020-36229)

  - A flaw was discovered in OpenLDAP before 2.4.57 leading
    in an assertion failure in slapd in the X.509 DN
    parsing in decode.c ber_next_element, resulting in
    denial of service.(CVE-2020-36230)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-1250
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e9cf4e3e");
  script_set_attribute(attribute:"solution", value:
"Update the affected openldap packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/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-2020-36230");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-servers");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  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:"Huawei 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/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  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/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(9)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9", "EulerOS UVP " + uvp);

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

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

flag = 0;

pkgs = ["openldap-2.4.49-3.h7.eulerosv2r9",
        "openldap-clients-2.4.49-3.h7.eulerosv2r9",
        "openldap-servers-2.4.49-3.h7.eulerosv2r9"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"9", reference:pkg)) 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, "openldap");
}