Vulnerabilities > CVE-2019-3878 - Improper Authentication vulnerability in multiple products

047910
CVSS 8.1 - HIGH
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
high complexity
mod-auth-mellon-project
fedoraproject
redhat
canonical
CWE-287
nessus
NVD
Published: 2019-03-26
Updated: 2024-11-21

Summary

A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.

Vulnerable Configurations

Part Description Count
Application
Mod_Auth_Mellon_Project
18
OS
Fedoraproject
2
OS
Redhat
7
OS
Canonical
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-2D8EE47F61.NASL
    descriptionNew upstream release 0.14.2 which also fixes CVE-2019-3878 and CVE-2019-3877 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id124481
    published2019-05-02
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124481
    titleFedora 30 : mod_auth_mellon (2019-2d8ee47f61)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2019-2d8ee47f61.
#

include("compat.inc");

if (description)
{
  script_id(124481);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/21");

  script_cve_id("CVE-2019-3877", "CVE-2019-3878");
  script_xref(name:"FEDORA", value:"2019-2d8ee47f61");

  script_name(english:"Fedora 30 : mod_auth_mellon (2019-2d8ee47f61)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New upstream release 0.14.2 which also fixes CVE-2019-3878 and
CVE-2019-3877

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
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://bodhi.fedoraproject.org/updates/FEDORA-2019-2d8ee47f61"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected mod_auth_mellon package."
  );
  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:fedoraproject:fedora:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/02");
  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:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^30([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 30", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC30", reference:"mod_auth_mellon-0.14.2-1.fc30")) 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, "mod_auth_mellon");
}
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-1321.NASL
    descriptionAccording to the versions of the mod_auth_mellon package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) - mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) 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.
    last seen2020-05-06
    modified2019-05-01
    plugin id124448
    published2019-05-01
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124448
    titleEulerOS 2.0 SP5 : mod_auth_mellon (EulerOS-SA-2019-1321)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(124448);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");

  script_cve_id(
    "CVE-2019-3877",
    "CVE-2019-3878"
  );

  script_name(english:"EulerOS 2.0 SP5 : mod_auth_mellon (EulerOS-SA-2019-1321)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  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 mod_auth_mellon package installed,
the EulerOS installation on the remote host is affected by the
following vulnerabilities :

  - mod_auth_mellon: authentication bypass in ECP flow
    (CVE-2019-3878)

  - mod_auth_mellon: open redirect in logout url when using
    URLs with backslashes (CVE-2019-3877)

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-2019-1321
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4d4b9824");
  script_set_attribute(attribute:"solution", value:
"Update the affected mod_auth_mellon 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:"patch_publication_date", value:"2019/04/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2020 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 !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["mod_auth_mellon-0.13.1-3.h3.eulerosv2r7"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"5", 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, "mod_auth_mellon");
}
  • NASL familyOracle Linux Local Security Checks
    NASL idORACLELINUX_ELSA-2019-0766.NASL
    descriptionFrom Red Hat Security Advisory 2019:0766 : An update for mod_auth_mellon is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions generated by an IdP server. Security Fix(es) : * mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) * mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * mod_auth_mellon Cert files name wrong when hostname contains a number (fixed in upstream package) (BZ#1697487)
    last seen2020-06-01
    modified2020-06-02
    plugin id124097
    published2019-04-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124097
    titleOracle Linux 7 : mod_auth_mellon (ELSA-2019-0766)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2019:0766 and 
# Oracle Linux Security Advisory ELSA-2019-0766 respectively.
#

include("compat.inc");

if (description)
{
  script_id(124097);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/23");

  script_cve_id("CVE-2019-3877", "CVE-2019-3878");
  script_xref(name:"RHSA", value:"2019:0766");

  script_name(english:"Oracle Linux 7 : mod_auth_mellon (ELSA-2019-0766)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2019:0766 :

An update for mod_auth_mellon is now available for Red Hat Enterprise
Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The mod_auth_mellon module for the Apache HTTP Server is an
authentication service that implements the SAML 2.0 federation
protocol. The module grants access based on the attributes received in
assertions generated by an IdP server.

Security Fix(es) :

* mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878)

* mod_auth_mellon: open redirect in logout url when using URLs with
backslashes (CVE-2019-3877)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.

Bug Fix(es) :

* mod_auth_mellon Cert files name wrong when hostname contains a
number (fixed in upstream package) (BZ#1697487)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2019-April/008652.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected mod_auth_mellon 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:oracle:linux:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mod_auth_mellon-diagnostics");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/17");
  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:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/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);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 7", "Oracle Linux " + os_ver);

if (!get_kb_item("Host/RedHat/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"mod_auth_mellon-0.14.0-2.el7_6.4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4")) 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, "mod_auth_mellon / mod_auth_mellon-diagnostics");
}
  • NASL familyCentOS Local Security Checks
    NASL idCENTOS_RHSA-2019-0766.NASL
    descriptionAn update for mod_auth_mellon is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions generated by an IdP server. Security Fix(es) : * mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) * mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * mod_auth_mellon Cert files name wrong when hostname contains a number (fixed in upstream package) (BZ#1697487)
    last seen2020-06-01
    modified2020-06-02
    plugin id124093
    published2019-04-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124093
    titleCentOS 7 : mod_auth_mellon (CESA-2019:0766)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:0766 and 
# CentOS Errata and Security Advisory 2019:0766 respectively.
#

include("compat.inc");

if (description)
{
  script_id(124093);
  script_version("1.4");
  script_cvs_date("Date: 2020/01/23");

  script_cve_id("CVE-2019-3877", "CVE-2019-3878");
  script_xref(name:"RHSA", value:"2019:0766");

  script_name(english:"CentOS 7 : mod_auth_mellon (CESA-2019:0766)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for mod_auth_mellon is now available for Red Hat Enterprise
Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The mod_auth_mellon module for the Apache HTTP Server is an
authentication service that implements the SAML 2.0 federation
protocol. The module grants access based on the attributes received in
assertions generated by an IdP server.

Security Fix(es) :

* mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878)

* mod_auth_mellon: open redirect in logout url when using URLs with
backslashes (CVE-2019-3877)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.

Bug Fix(es) :

* mod_auth_mellon Cert files name wrong when hostname contains a
number (fixed in upstream package) (BZ#1697487)"
  );
  # https://lists.centos.org/pipermail/centos-announce/2019-April/023270.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?6ea71a5f"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected mod_auth_mellon 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:"cvss_score_source", value:"CVE-2019-3878");
  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:centos:centos:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:mod_auth_mellon-diagnostics");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/17");
  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:"CentOS Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"mod_auth_mellon-0.14.0-2.el7_6.4")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4")) 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, "mod_auth_mellon / mod_auth_mellon-diagnostics");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-DB1E9B3002.NASL
    descriptionNew upstream release 0.14.2 which also fixes CVE-2019-3878 and CVE-2019-3877 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id123573
    published2019-04-02
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123573
    titleFedora 29 : mod_auth_mellon (2019-db1e9b3002)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2019-db1e9b3002.
#

include("compat.inc");

if (description)
{
  script_id(123573);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/27");

  script_cve_id("CVE-2019-3877", "CVE-2019-3878");
  script_xref(name:"FEDORA", value:"2019-db1e9b3002");

  script_name(english:"Fedora 29 : mod_auth_mellon (2019-db1e9b3002)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New upstream release 0.14.2 which also fixes CVE-2019-3878 and
CVE-2019-3877

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
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://bodhi.fedoraproject.org/updates/FEDORA-2019-db1e9b3002"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected mod_auth_mellon package."
  );
  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:fedoraproject:fedora:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:29");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/02");
  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:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^29([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 29", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC29", reference:"mod_auth_mellon-0.14.0-5.fc29")) 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, "mod_auth_mellon");
}
  • NASL familyAmazon Linux Local Security Checks
    NASL idAL2_ALAS-2019-1200.NASL
    descriptionA vulnerability was found in a previous version of mod_auth_mellon. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function.(CVE-2019-3877) A vulnerability was found in mod_auth_mellon. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.(CVE-2019-3878)
    last seen2020-06-01
    modified2020-06-02
    plugin id125287
    published2019-05-21
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125287
    titleAmazon Linux 2 : mod_auth_mellon (ALAS-2019-1200)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2019-1200.
#

include("compat.inc");

if (description)
{
  script_id(125287);
  script_version("1.2");
  script_cvs_date("Date: 2020/01/15");

  script_cve_id("CVE-2019-3877", "CVE-2019-3878");
  script_xref(name:"ALAS", value:"2019-1200");

  script_name(english:"Amazon Linux 2 : mod_auth_mellon (ALAS-2019-1200)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux 2 host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A vulnerability was found in a previous version of mod_auth_mellon. An
open redirect in the logout URL allows requests with backslashes to
pass through by assuming that it is a relative URL, while the browsers
silently convert backslash characters into forward slashes treating
them as an absolute URL. This mismatch allows an attacker to bypass
the redirect URL validation logic in apr_uri_parse
function.(CVE-2019-3877)

A vulnerability was found in mod_auth_mellon. If Apache is configured
as a reverse proxy and mod_auth_mellon is configured to only let
through authenticated users (with the require valid-user directive),
adding special HTTP headers that are normally used to start the
special SAML ECP (non-browser based) can be used to bypass
authentication.(CVE-2019-3878)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/AL2/ALAS-2019-1200.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update mod_auth_mellon' to update your system."
  );
  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:amazon:linux:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_auth_mellon-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_auth_mellon-diagnostics");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/21");
  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:"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 != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

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


flag = 0;
if (rpm_check(release:"AL2", reference:"mod_auth_mellon-0.14.0-2.amzn2.4")) flag++;
if (rpm_check(release:"AL2", reference:"mod_auth_mellon-debuginfo-0.14.0-2.amzn2.4")) flag++;
if (rpm_check(release:"AL2", reference:"mod_auth_mellon-diagnostics-0.14.0-2.amzn2.4")) 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, "mod_auth_mellon / mod_auth_mellon-debuginfo / etc");
}
  • NASL familyScientific Linux Local Security Checks
    NASL idSL_20190416_MOD_AUTH_MELLON_ON_SL7_X.NASL
    descriptionSecurity Fix(es) : - mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) - mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) Bug Fix(es) : - mod_auth_mellon Cert files name wrong when hostname contains a number (fixed in upstream package)
    last seen2020-03-18
    modified2019-04-17
    plugin id124100
    published2019-04-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124100
    titleScientific Linux Security Update : mod_auth_mellon on SL7.x x86_64 (20190416)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(124100);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/24");

  script_cve_id("CVE-2019-3877", "CVE-2019-3878");

  script_name(english:"Scientific Linux Security Update : mod_auth_mellon on SL7.x x86_64 (20190416)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security Fix(es) :

  - mod_auth_mellon: authentication bypass in ECP flow
    (CVE-2019-3878)

  - mod_auth_mellon: open redirect in logout url when using
    URLs with backslashes (CVE-2019-3877)

Bug Fix(es) :

  - mod_auth_mellon Cert files name wrong when hostname
    contains a number (fixed in upstream package)"
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1904&L=SCIENTIFIC-LINUX-ERRATA&P=4368
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?aa520f9f"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected mod_auth_mellon and / or mod_auth_mellon-debuginfo
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:fermilab:scientific_linux:mod_auth_mellon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mod_auth_mellon-debuginfo");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/17");
  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:"Scientific Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

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


flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mod_auth_mellon-0.14.0-2.el7_6.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4")) 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, "mod_auth_mellon / mod_auth_mellon-debuginfo");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3924-1.NASL
    descriptionIt was discovered that mod_auth_mellon incorrectly handled certain requests. An attacker could possibly use this issue to redirect a user to a malicious URL. (CVE-2019-3877) It was discovered that mod_auth_mellon incorrectly handled certain requests. An attacker could possibly use this issue to access sensitive information. (CVE-2019-3878). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id123503
    published2019-03-29
    reporterUbuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123503
    titleUbuntu 18.04 LTS / 18.10 : libapache2-mod-auth-mellon vulnerabilities (USN-3924-1)
  • NASL familyRed Hat Local Security Checks
    NASL idREDHAT-RHSA-2019-0746.NASL
    descriptionAn update for httpd24-httpd and httpd24-mod_auth_mellon is now available for Red Hat Software Collections. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The Apache HTTP Server is a powerful, efficient, and extensible web server. The httpd24 packages provide a recent stable release of version 2.4 of the Apache HTTP Server, along with the mod_auth_kerb module. Security Fix(es) : * httpd: privilege escalation from modules scripts (CVE-2019-0211) * mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
    last seen2020-06-01
    modified2020-06-02
    plugin id124098
    published2019-04-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124098
    titleRHEL 6 / 7 : httpd24-httpd and httpd24-mod_auth_mellon (RHSA-2019:0746)
  • NASL familyNewStart CGSL Local Security Checks
    NASL idNEWSTART_CGSL_NS-SA-2019-0077_MOD_AUTH_MELLON.NASL
    descriptionThe remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has mod_auth_mellon packages installed that are affected by multiple vulnerabilities: - A vulnerability was found in mod_auth_mellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function. (CVE-2019-3877) - A vulnerability was found in mod_auth_mellon. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication. (CVE-2019-3878) Note that Nessus has not tested for this issue but has instead relied only on the application
    last seen2020-06-01
    modified2020-06-02
    plugin id127286
    published2019-08-12
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/127286
    titleNewStart CGSL CORE 5.04 / MAIN 5.04 : mod_auth_mellon Multiple Vulnerabilities (NS-SA-2019-0077)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-1320.NASL
    descriptionAccording to the versions of the mod_auth_mellon package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) - mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) 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.
    last seen2020-05-06
    modified2019-05-01
    plugin id124447
    published2019-05-01
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124447
    titleEulerOS 2.0 SP3 : mod_auth_mellon (EulerOS-SA-2019-1320)
  • NASL familyOracle Linux Local Security Checks
    NASL idORACLELINUX_ELSA-2019-0985.NASL
    descriptionFrom Red Hat Security Advisory 2019:0985 : An update for mod_auth_mellon is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions generated by an IdP server. Security Fix(es) : * mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
    last seen2020-06-01
    modified2020-06-02
    plugin id127574
    published2019-08-12
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/127574
    titleOracle Linux 8 : mod_auth_mellon (ELSA-2019-0985)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4414.NASL
    descriptionSeveral issues have been discovered in Apache module auth_mellon, which provides SAML 2.0 authentication. - CVE-2019-3877 It was possible to bypass the redirect URL checking on logout, so the module could be used as an open redirect facility. - CVE-2019-3878 When mod_auth_mellon is used in an Apache configuration which serves as a remote proxy with the http_proxy module, it was possible to bypass authentication by sending SAML ECP headers.
    last seen2020-06-01
    modified2020-06-02
    plugin id123024
    published2019-03-25
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123024
    titleDebian DSA-4414-1 : libapache2-mod-auth-mellon - security update
  • NASL familyAmazon Linux Local Security Checks
    NASL idALA_ALAS-2019-1200.NASL
    descriptionA vulnerability was found in mod_auth_mellon. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication. (CVE-2019-3878) A vulnerability was found in mod_auth_mellon where an open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function. (CVE-2019-3877)
    last seen2020-06-01
    modified2020-06-02
    plugin id124653
    published2019-05-07
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124653
    titleAmazon Linux AMI : mod24_auth_mellon (ALAS-2019-1200)
  • NASL familyRed Hat Local Security Checks
    NASL idREDHAT-RHSA-2019-0766.NASL
    descriptionAn update for mod_auth_mellon is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions generated by an IdP server. Security Fix(es) : * mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) * mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * mod_auth_mellon Cert files name wrong when hostname contains a number (fixed in upstream package) (BZ#1697487)
    last seen2020-06-01
    modified2020-06-02
    plugin id124099
    published2019-04-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124099
    titleRHEL 7 : mod_auth_mellon (RHSA-2019:0766)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-1319.NASL
    descriptionAccording to the versions of the mod_auth_mellon package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) - mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877) 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.
    last seen2020-05-06
    modified2019-05-01
    plugin id124446
    published2019-05-01
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124446
    titleEulerOS 2.0 SP2 : mod_auth_mellon (EulerOS-SA-2019-1319)
  • NASL familyRed Hat Local Security Checks
    NASL idREDHAT-RHSA-2019-0985.NASL
    descriptionAn update for mod_auth_mellon is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The mod_auth_mellon module for the Apache HTTP Server is an authentication service that implements the SAML 2.0 federation protocol. The module grants access based on the attributes received in assertions generated by an IdP server. Security Fix(es) : * mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
    last seen2020-06-01
    modified2020-06-02
    plugin id124671
    published2019-05-07
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124671
    titleRHEL 8 : mod_auth_mellon (RHSA-2019:0985)

Redhat

advisories
  • bugzilla
    id1697487
    titlemod_auth_mellon Cert files name wrong when hostname contains a number (fixed in upstream package) [rhel-7.6.z]
    oval
    OR
    • commentRed Hat Enterprise Linux must be installed
      ovaloval:com.redhat.rhba:tst:20070304026
    • AND
      • commentRed Hat Enterprise Linux 7 is installed
        ovaloval:com.redhat.rhba:tst:20150364027
      • OR
        • AND
          • commentmod_auth_mellon is earlier than 0:0.14.0-2.el7_6.4
            ovaloval:com.redhat.rhsa:tst:20190766001
          • commentmod_auth_mellon is signed with Red Hat redhatrelease2 key
            ovaloval:com.redhat.rhsa:tst:20141803002
        • AND
          • commentmod_auth_mellon-diagnostics is earlier than 0:0.14.0-2.el7_6.4
            ovaloval:com.redhat.rhsa:tst:20190766003
          • commentmod_auth_mellon-diagnostics is signed with Red Hat redhatrelease2 key
            ovaloval:com.redhat.rhsa:tst:20190766004
    rhsa
    idRHSA-2019:0766
    released2019-04-16
    severityImportant
    titleRHSA-2019:0766: mod_auth_mellon security and bug fix update (Important)
  • bugzilla
    id1691126
    titleCVE-2019-3878 mod_auth_mellon: authentication bypass in ECP flow
    oval
    OR
    • commentRed Hat Enterprise Linux must be installed
      ovaloval:com.redhat.rhba:tst:20070304026
    • AND
      • commentRed Hat Enterprise Linux 8 is installed
        ovaloval:com.redhat.rhba:tst:20193384074
      • OR
        • AND
          • commentmod_auth_mellon-debugsource is earlier than 0:0.14.0-3.el8_0.2
            ovaloval:com.redhat.rhsa:tst:20190985001
          • commentmod_auth_mellon-debugsource is signed with Red Hat redhatrelease2 key
            ovaloval:com.redhat.rhsa:tst:20190985002
        • AND
          • commentmod_auth_mellon is earlier than 0:0.14.0-3.el8_0.2
            ovaloval:com.redhat.rhsa:tst:20190985003
          • commentmod_auth_mellon is signed with Red Hat redhatrelease2 key
            ovaloval:com.redhat.rhsa:tst:20141803002
    rhsa
    idRHSA-2019:0985
    released2019-05-07
    severityImportant
    titleRHSA-2019:0985: mod_auth_mellon security update (Important)
  • rhsa
    idRHBA-2019:0959
  • rhsa
    idRHSA-2019:0746
rpms
  • httpd24-httpd-0:2.4.34-7.el6.1
  • httpd24-httpd-0:2.4.34-7.el7.1
  • httpd24-httpd-debuginfo-0:2.4.34-7.el6.1
  • httpd24-httpd-debuginfo-0:2.4.34-7.el7.1
  • httpd24-httpd-devel-0:2.4.34-7.el6.1
  • httpd24-httpd-devel-0:2.4.34-7.el7.1
  • httpd24-httpd-manual-0:2.4.34-7.el6.1
  • httpd24-httpd-manual-0:2.4.34-7.el7.1
  • httpd24-httpd-tools-0:2.4.34-7.el6.1
  • httpd24-httpd-tools-0:2.4.34-7.el7.1
  • httpd24-mod_auth_mellon-0:0.13.1-2.el7.1
  • httpd24-mod_auth_mellon-debuginfo-0:0.13.1-2.el7.1
  • httpd24-mod_ldap-0:2.4.34-7.el6.1
  • httpd24-mod_ldap-0:2.4.34-7.el7.1
  • httpd24-mod_md-0:2.4.34-7.el7.1
  • httpd24-mod_proxy_html-1:2.4.34-7.el6.1
  • httpd24-mod_proxy_html-1:2.4.34-7.el7.1
  • httpd24-mod_session-0:2.4.34-7.el6.1
  • httpd24-mod_session-0:2.4.34-7.el7.1
  • httpd24-mod_ssl-1:2.4.34-7.el6.1
  • httpd24-mod_ssl-1:2.4.34-7.el7.1
  • mod_auth_mellon-0:0.14.0-2.el7_6.4
  • mod_auth_mellon-debuginfo-0:0.14.0-2.el7_6.4
  • mod_auth_mellon-diagnostics-0:0.14.0-2.el7_6.4
  • mod_auth_mellon-0:0.14.0-3.el8_0.2
  • mod_auth_mellon-debuginfo-0:0.14.0-3.el8_0.2
  • mod_auth_mellon-debugsource-0:0.14.0-3.el8_0.2
  • mod_auth_mellon-diagnostics-debuginfo-0:0.14.0-3.el8_0.2

References