Vulnerabilities > CVE-2015-2047 - Improper Authentication vulnerability in multiple products

047910
CVSS 2.6 - LOW
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
PARTIAL
Availability impact
NONE
network
high complexity
typo3
debian
CWE-287
nessus

Summary

The rsaauth extension in TYPO3 4.3.0 through 4.3.14, 4.4.0 through 4.4.15, 4.5.0 through 4.5.39, and 4.6.0 through 4.6.18, when configured for the frontend, allows remote attackers to bypass authentication via a password that is casted to an empty value.

Vulnerable Configurations

Part Description Count
Application
Typo3
91
OS
Debian
1

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 familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3164.NASL
    descriptionPierrick Caillon discovered that the authentication could be bypassed in the Typo 3 content management system. Please refer to the upstream advisory for additional information :
    last seen2020-03-17
    modified2015-02-24
    plugin id81444
    published2015-02-24
    reporterThis script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/81444
    titleDebian DSA-3164-1 : typo3-src - security update
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Debian Security Advisory DSA-3164. The text 
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(81444);
      script_version("1.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2015-2047");
      script_xref(name:"DSA", value:"3164");
    
      script_name(english:"Debian DSA-3164-1 : typo3-src - 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:
    "Pierrick Caillon discovered that the authentication could be bypassed
    in the Typo 3 content management system. Please refer to the upstream
    advisory for additional information :"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778870"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/wheezy/typo3-src"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.debian.org/security/2015/dsa-3164"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "Upgrade the typo3-src packages.
    
    For the stable distribution (wheezy), this problem has been fixed in
    version 4.5.19+dfsg1-5+wheezy4.
    
    The upcoming stable distribution (jessie) no longer includes Typo 3."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:typo3-src");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2015/02/21");
      script_set_attribute(attribute:"plugin_publication_date", value:"2015/02/24");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2015-2020 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:"7.0", prefix:"typo3", reference:"4.5.19+dfsg1-5+wheezy4")) flag++;
    if (deb_check(release:"7.0", prefix:"typo3-database", reference:"4.5.19+dfsg1-5+wheezy4")) flag++;
    if (deb_check(release:"7.0", prefix:"typo3-dummy", reference:"4.5.19+dfsg1-5+wheezy4")) flag++;
    if (deb_check(release:"7.0", prefix:"typo3-src-4.5", reference:"4.5.19+dfsg1-5+wheezy4")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_note(port:0, extra:deb_report_get());
      else security_note(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2016-1022.NASL
    descriptionThis update for typo3-cms-4_5 fixes the following issues : - CVE-2015-2047: Authentication Bypass (TYPO3-CORE-SA-2015-001) - CVE-2014-9508: Link spoofing and cache poisoning (TYPO3-CORE-SA-2014-003) - TYPO3-CORE-SA-2014-002: Multiple Vulnerabilities - CVE-2013-7073: Multiple vulnerabilities (TYPO3-CORE-SA-2013-004) This update contains the last upstream release 4.5.40, LTS discontinued since 04.2015.
    last seen2020-06-05
    modified2016-08-30
    plugin id93213
    published2016-08-30
    reporterThis script is Copyright (C) 2016-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/93213
    titleopenSUSE Security Update : typo3-cms-4_5 (openSUSE-2016-1022)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from openSUSE Security Update openSUSE-2016-1022.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(93213);
      script_version("2.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2013-7073", "CVE-2014-9508", "CVE-2015-2047");
    
      script_name(english:"openSUSE Security Update : typo3-cms-4_5 (openSUSE-2016-1022)");
      script_summary(english:"Check for the openSUSE-2016-1022 patch");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote openSUSE host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for typo3-cms-4_5 fixes the following issues :
    
      - CVE-2015-2047: Authentication Bypass
        (TYPO3-CORE-SA-2015-001)
    
      - CVE-2014-9508: Link spoofing and cache poisoning
        (TYPO3-CORE-SA-2014-003)
    
      - TYPO3-CORE-SA-2014-002: Multiple Vulnerabilities
    
      - CVE-2013-7073: Multiple vulnerabilities
        (TYPO3-CORE-SA-2013-004) This update contains the last
        upstream release 4.5.40, LTS discontinued since 04.2015."
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected typo3-cms-4_5 package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:typo3-cms-4_5");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:13.2");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.1");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2016/08/29");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/30");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2016-2020 Tenable Network Security, Inc.");
      script_family(english:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
    if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
    if (release !~ "^(SUSE13\.2|SUSE42\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "13.2 / 42.1", release);
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    
    flag = 0;
    
    if ( rpm_check(release:"SUSE13.2", reference:"typo3-cms-4_5-4.5.40-2.3.1") ) flag++;
    if ( rpm_check(release:"SUSE42.1", reference:"typo3-cms-4_5-4.5.40-7.1") ) 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, "typo3-cms-4_5");
    }