Vulnerabilities > CVE-2019-13031 - XXE vulnerability in multiple products

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL

Summary

LemonLDAP::NG before 1.9.20 has an XML External Entity (XXE) issue when submitting a notification to the notification server. By default, the notification server is not enabled and has a "deny all" rule.

Vulnerable Configurations

Part Description Count
Application
Lemonldap-Ng
27
OS
Debian
1

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DLA-1844.NASL
descriptionIt was discovered that there was a XML external entity vulnerability in the lemonldap-ng single-sign on system. This may have led to the disclosure of confidential data, denial of service, server side request forgery, port scanning, etc. For Debian 8
last seen2020-06-01
modified2020-06-02
plugin id126482
published2019-07-05
reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/126482
titleDebian DLA-1844-1 : lemonldap-ng security update
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1844-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(126482);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/08");

  script_cve_id("CVE-2019-13031");

  script_name(english:"Debian DLA-1844-1 : lemonldap-ng security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that there was a XML external entity vulnerability
in the lemonldap-ng single-sign on system. This may have led to the
disclosure of confidential data, denial of service, server side
request forgery, port scanning, etc.

For Debian 8 'Jessie', this issue has been fixed in lemonldap-ng
version 1.3.3-1+deb8u2.

We recommend that you upgrade your lemonldap-ng packages.

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/2019/07/msg00003.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/lemonldap-ng"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-common-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-conf-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-handler-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-manager-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-portal-perl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/05");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  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:"8.0", prefix:"lemonldap-ng", reference:"1.3.3-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"lemonldap-ng-doc", reference:"1.3.3-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-common-perl", reference:"1.3.3-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-conf-perl", reference:"1.3.3-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-handler-perl", reference:"1.3.3-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-manager-perl", reference:"1.3.3-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-portal-perl", reference:"1.3.3-1+deb8u2")) 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");