Debian DLA-2544-1 : openldap security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2544-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(146191);
  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:"Debian DLA-2544-1 : openldap security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Several vulnerabilities were discovered in OpenLDAP, a free
implementation of the Lightweight Directory Access Protocol. An
unauthenticated remote attacker can take advantage of these flaws to
cause a denial of service (slapd daemon crash, infinite loops) via
specially crafted packets.

For Debian 9 stretch, these problems have been fixed in version
2.4.44+dfsg-5+deb9u7.

We recommend that you upgrade your openldap packages.

For the detailed security status of openldap please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/openldap

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2021/02/msg00005.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/openldap");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/openldap");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected 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:"vuln_publication_date", value:"2021/01/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ldap-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap-2.4-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap-2.4-2-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:slapd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:slapd-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:slapd-smbk5pwd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  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:"Debian 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/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"ldap-utils", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"libldap-2.4-2", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"libldap-2.4-2-dbg", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"libldap-common", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"libldap2-dev", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"slapd", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"slapd-dbg", reference:"2.4.44+dfsg-5+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"slapd-smbk5pwd", reference:"2.4.44+dfsg-5+deb9u7")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");