Vulnerabilities > CVE-2019-12046 - Insufficiently Protected Credentials vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
lemonldap-ng
debian
CWE-522
nessus
NVD
Published: 2019-05-22
Updated: 2020-08-24

Summary

LemonLDAP::NG -2.0.3 has Incorrect Access Control.

Vulnerable Configurations

Part Description Count
Application
Lemonldap-Ng
1
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Session Sidejacking
    Session sidejacking takes advantage of an unencrypted communication channel between a victim and target system. The attacker sniffs traffic on a network looking for session tokens in unencrypted traffic. Once a session token is captured, the attacker performs malicious actions by using the stolen token with the targeted application to impersonate the victim. This attack is a specific method of session hijacking, which is exploiting a valid session token to gain unauthorized access to a target system or information. Other methods to perform a session hijacking are session fixation, cross-site scripting, or compromising a user or server machine and stealing the session token.
  • Lifting credential(s)/key material embedded in client distributions (thick or thin)
    An attacker examines a target application's code or configuration files to find credential or key material that has been embedded within the application or its files. Many services require authentication with their users for the various purposes including billing, access control or attribution. Some client applications store the user's authentication credentials or keys to accelerate the login process. Some clients may have built-in keys or credentials (in which case the server is authenticating with the client, rather than the user). If the attacker is able to locate where this information is stored, they may be able to retrieve these credentials. The attacker could then use these stolen credentials to impersonate the user or client, respectively, in interactions with the service or use stolen keys to eavesdrop on nominally secure communications between the client and server.
  • Password Recovery Exploitation
    An attacker may take advantage of the application feature to help users recover their forgotten passwords in order to gain access into the system with the same privileges as the original user. Generally password recovery schemes tend to be weak and insecure. Most of them use only one security question . For instance, mother's maiden name tends to be a fairly popular one. Unfortunately in many cases this information is not very hard to find, especially if the attacker knows the legitimate user. These generic security questions are also re-used across many applications, thus making them even more insecure. An attacker could for instance overhear a coworker talking to a bank representative at the work place and supplying their mother's maiden name for verification purposes. An attacker can then try to log in into one of the victim's accounts, click on "forgot password" and there is a good chance that the security question there will be to provide mother's maiden name. A weak password recovery scheme totally undermines the effectiveness of a strong password scheme.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1790.NASL
    descriptionErratum: bad versions An attack vector was discovered by lemonldap-ng developers. When the SAML or CAS service provider is enable and the administrator has chosen to store SAML/CAS tokens in the session database, an attacker can open an anonymous session to connect to any protected application that does not have specific access rules. For Debian 8
    last seen2020-06-01
    modified2020-06-02
    plugin id125266
    published2019-05-20
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125266
    titleDebian DLA-1790-1 : 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-1790-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(125266);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/15");

  script_cve_id("CVE-2019-12046");

  script_name(english:"Debian DLA-1790-1 : 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:
"Erratum: bad versions

An attack vector was discovered by lemonldap-ng developers. When the
SAML or CAS service provider is enable and the administrator has
chosen to store SAML/CAS tokens in the session database, an attacker
can open an anonymous session to connect to any protected application
that does not have specific access rules.

For Debian 8 'Jessie', this problem has been fixed in version
1.3.3-1+deb9u1.

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/2019/05/msg00021.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:L/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:L/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:"2019/05/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/20");
  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+deb9u1")) flag++;
if (deb_check(release:"8.0", prefix:"lemonldap-ng-doc", reference:"1.3.3-1+deb9u1")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-common-perl", reference:"1.3.3-1+deb9u1")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-conf-perl", reference:"1.3.3-1+deb9u1")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-handler-perl", reference:"1.3.3-1+deb9u1")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-manager-perl", reference:"1.3.3-1+deb9u1")) flag++;
if (deb_check(release:"8.0", prefix:"liblemonldap-ng-portal-perl", reference:"1.3.3-1+deb9u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4446.NASL
    descriptionIt was discovered that the Lemonldap::NG web SSO system performed insufficient validation of session tokens if the
    last seen2020-06-01
    modified2020-06-02
    plugin id125097
    published2019-05-15
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125097
    titleDebian DSA-4446-1 : 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 DSA-4446. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(125097);
  script_version("1.4");
  script_cvs_date("Date: 2020/01/17");

  script_cve_id("CVE-2019-12046");
  script_xref(name:"DSA", value:"4446");

  script_name(english:"Debian DSA-4446-1 : lemonldap-ng - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that the Lemonldap::NG web SSO system performed
insufficient validation of session tokens if the
'tokenUseGlobalStorage'option is enabled, which could grant users with
access to the main session database access to an anonymous session."
  );
  # https://security-tracker.debian.org/tracker/source-package/lemonldap-ng
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?9f8cb51e"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/lemonldap-ng"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2019/dsa-4446"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the lemonldap-ng packages.

For the stable distribution (stretch), this problem has been fixed in
version 1.9.7-3+deb9u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/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:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/05/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/15");
  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:"9.0", prefix:"lemonldap-ng", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"lemonldap-ng-doc", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"lemonldap-ng-fastcgi-server", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"lemonldap-ng-fr-doc", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"lemonldap-ng-handler", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"liblemonldap-ng-common-perl", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"liblemonldap-ng-conf-perl", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"liblemonldap-ng-handler-perl", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"liblemonldap-ng-manager-perl", reference:"1.9.7-3+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"liblemonldap-ng-portal-perl", reference:"1.9.7-3+deb9u1")) flag++;

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

References