Vulnerabilities > CVE-2015-2684 - Improper Input Validation vulnerability in multiple products

047910
CVSS 4.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
shibboleth
debian
CWE-20
nessus

Summary

Shibboleth Service Provider (SP) before 2.5.4 allows remote authenticated users to cause a denial of service (crash) via a crafted SAML message.

Vulnerable Configurations

Part Description Count
Application
Shibboleth
1
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3207.NASL
    descriptionA denial of service vulnerability was found in the Shibboleth (an federated identity framework) Service Provider. When processing certain malformed SAML message generated by an authenticated attacker, the daemon could crash.
    last seen2020-03-17
    modified2015-03-30
    plugin id82304
    published2015-03-30
    reporterThis script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/82304
    titleDebian DSA-3207-1 : shibboleth-sp2 - 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-3207. The text 
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(82304);
      script_version("1.6");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2015-2684");
      script_bugtraq_id(73314);
      script_xref(name:"DSA", value:"3207");
    
      script_name(english:"Debian DSA-3207-1 : shibboleth-sp2 - 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:
    "A denial of service vulnerability was found in the Shibboleth (an
    federated identity framework) Service Provider. When processing
    certain malformed SAML message generated by an authenticated attacker,
    the daemon could crash."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/wheezy/shibboleth-sp2"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.debian.org/security/2015/dsa-3207"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "Upgrade the shibboleth-sp2 packages.
    
    For the stable distribution (wheezy), this problem has been fixed in
    version 2.4.3+dfsg-5+deb7u1.
    
    For the upcoming stable distribution (jessie), this problem has been
    fixed in version 2.5.3+dfsg-2."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:shibboleth-sp2");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2015/03/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/30");
      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:"libapache2-mod-shib2", reference:"2.4.3+dfsg-5+deb7u1")) flag++;
    if (deb_check(release:"7.0", prefix:"libshibsp-dev", reference:"2.4.3+dfsg-5+deb7u1")) flag++;
    if (deb_check(release:"7.0", prefix:"libshibsp-doc", reference:"2.4.3+dfsg-5+deb7u1")) flag++;
    if (deb_check(release:"7.0", prefix:"libshibsp5", reference:"2.4.3+dfsg-5+deb7u1")) flag++;
    if (deb_check(release:"7.0", prefix:"shibboleth-sp2-schemas", reference:"2.4.3+dfsg-5+deb7u1")) 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");
    
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_B202E4CE311411E5AA320026551A22DC.NASL
    descriptionShibboleth consortium reports : Shibboleth SP software crashes on well-formed but invalid XML. The Service Provider software contains a code path with an uncaught exception that can be triggered by an unauthenticated attacker by supplying well-formed but schema-invalid XML in the form of SAML metadata or SAML protocol messages. The result is a crash and so causes a denial of service. You must rebuild opensaml and shibboleth with xmltooling-1.5.5 or later. The easiest way to do so is to update the whole chain including shibboleth-2.5.5 an opensaml2.5.5.
    last seen2020-06-01
    modified2020-06-02
    plugin id84995
    published2015-07-27
    reporterThis script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84995
    titleFreeBSD : shibboleth-sp -- DoS vulnerability (b202e4ce-3114-11e5-aa32-0026551a22dc)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from the FreeBSD VuXML database :
    #
    # Copyright 2003-2018 Jacques Vidrine and contributors
    #
    # Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
    # HTML, PDF, PostScript, RTF and so forth) with or without modification,
    # are permitted provided that the following conditions are met:
    # 1. Redistributions of source code (VuXML) must retain the above
    #    copyright notice, this list of conditions and the following
    #    disclaimer as the first lines of this file unmodified.
    # 2. Redistributions in compiled form (transformed to other DTDs,
    #    published online in any format, converted to PDF, PostScript,
    #    RTF and other formats) must reproduce the above copyright
    #    notice, this list of conditions and the following disclaimer
    #    in the documentation and/or other materials provided with the
    #    distribution.
    # 
    # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
    # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
    # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
    # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
    # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
    # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
    # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
    # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
    # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(84995);
      script_version("2.2");
      script_cvs_date("Date: 2018/11/10 11:49:44");
    
      script_cve_id("CVE-2015-2684");
    
      script_name(english:"FreeBSD : shibboleth-sp -- DoS vulnerability (b202e4ce-3114-11e5-aa32-0026551a22dc)");
      script_summary(english:"Checks for updated packages in pkg_info output");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote FreeBSD host is missing one or more security-related
    updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Shibboleth consortium reports :
    
    Shibboleth SP software crashes on well-formed but invalid XML.
    
    The Service Provider software contains a code path with an uncaught
    exception that can be triggered by an unauthenticated attacker by
    supplying well-formed but schema-invalid XML in the form of SAML
    metadata or SAML protocol messages. The result is a crash and so
    causes a denial of service.
    
    You must rebuild opensaml and shibboleth with xmltooling-1.5.5 or
    later. The easiest way to do so is to update the whole chain including
    shibboleth-2.5.5 an opensaml2.5.5."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"http://shibboleth.net/community/advisories/secadv_20150721.txt"
      );
      # https://vuxml.freebsd.org/freebsd/b202e4ce-3114-11e5-aa32-0026551a22dc.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?c5174534"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:opensaml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:shibboleth-sp");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:xmltooling");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2015/07/21");
      script_set_attribute(attribute:"patch_publication_date", value:"2015/07/23");
      script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/27");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"FreeBSD Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("freebsd_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
    if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (pkg_test(save_report:TRUE, pkg:"xmltooling<1.5.5")) flag++;
    if (pkg_test(save_report:TRUE, pkg:"opensaml2<2.5.5")) flag++;
    if (pkg_test(save_report:TRUE, pkg:"shibboleth-sp<2.5.5")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
      else security_warning(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-259.NASL
    descriptionA denial of service vulnerability was found in the Shibboleth (an federated identity framework) Service Provider. When processing certain malformed SAML message generated by an authenticated attacker, the daemon could crash. For the Debian 6
    last seen2020-03-17
    modified2015-06-30
    plugin id84448
    published2015-06-30
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/84448
    titleDebian DLA-259-1 : shibboleth-sp2 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 DLA-259-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(84448);
      script_version("1.6");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2015-2684");
      script_bugtraq_id(73314);
    
      script_name(english:"Debian DLA-259-1 : shibboleth-sp2 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:
    "A denial of service vulnerability was found in the Shibboleth (an
    federated identity framework) Service Provider. When processing
    certain malformed SAML message generated by an authenticated attacker,
    the daemon could crash.
    
    For the Debian 6 'Squeeze' distribution, this problem has
    been fixed in version 2.3.1+dfsg-5+deb6u1.
    
    We recommend that you upgrade your shibboleth-sp2 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/2015/06/msg00026.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/squeeze-lts/shibboleth-sp2"
      );
      script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-mod-shib2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libshibsp-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libshibsp-doc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libshibsp4");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:shibboleth-sp2-schemas");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2015/06/29");
      script_set_attribute(attribute:"plugin_publication_date", value:"2015/06/30");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2015-2020 Tenable Network Security, Inc.");
      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:"6.0", prefix:"libapache2-mod-shib2", reference:"2.3.1+dfsg-5+deb6u1")) flag++;
    if (deb_check(release:"6.0", prefix:"libshibsp-dev", reference:"2.3.1+dfsg-5+deb6u1")) flag++;
    if (deb_check(release:"6.0", prefix:"libshibsp-doc", reference:"2.3.1+dfsg-5+deb6u1")) flag++;
    if (deb_check(release:"6.0", prefix:"libshibsp4", reference:"2.3.1+dfsg-5+deb6u1")) flag++;
    if (deb_check(release:"6.0", prefix:"shibboleth-sp2-schemas", reference:"2.3.1+dfsg-5+deb6u1")) 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");