Vulnerabilities > CVE-2008-4810 - Code Injection vulnerability in Smarty

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
smarty
CWE-94
nessus

Summary

The _expand_quoted_text function in libs/Smarty_Compiler.class.php in Smarty 2.6.20 before r2797 allows remote attackers to execute arbitrary PHP code via vectors related to templates and (1) a dollar-sign character, aka "php executed in templates;" and (2) a double quoted literal string, aka a "function injection security hole." NOTE: each vector affects slightly different SVN revisions.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201006-13.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201006-13 (Smarty: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Smarty: The vendor reported that the modifier.regex_replace.php plug-in contains an input sanitation flaw related to the ASCII NUL character (CVE-2008-1066). The vendor reported that the _expand_quoted_text() function in libs/Smarty_Compiler.class.php contains an input sanitation flaw via multiple vectors (CVE-2008-4810, CVE-2008-4811). Nine:Situations:Group::bookoo reported that the smarty_function_math() function in libs/plugins/function.math.php contains input sanitation flaw (CVE-2009-1669). Impact : These issues might allow a remote attacker to execute arbitrary PHP code. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id46793
    published2010-06-03
    reporterThis script is Copyright (C) 2010-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/46793
    titleGLSA-201006-13 : Smarty: Multiple vulnerabilities
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Gentoo Linux Security Advisory GLSA 201006-13.
    #
    # The advisory text is Copyright (C) 2001-2016 Gentoo Foundation, Inc.
    # and licensed under the Creative Commons - Attribution / Share Alike 
    # license. See http://creativecommons.org/licenses/by-sa/3.0/
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(46793);
      script_version("1.11");
      script_cvs_date("Date: 2019/08/02 13:32:45");
    
      script_cve_id("CVE-2008-1066", "CVE-2008-4810", "CVE-2008-4811", "CVE-2009-1669");
      script_bugtraq_id(28105, 31862, 34918);
      script_xref(name:"GLSA", value:"201006-13");
    
      script_name(english:"GLSA-201006-13 : Smarty: Multiple vulnerabilities");
      script_summary(english:"Checks for updated package(s) in /var/db/pkg");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Gentoo host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote host is affected by the vulnerability described in GLSA-201006-13
    (Smarty: Multiple vulnerabilities)
    
        Multiple vulnerabilities have been discovered in Smarty:
        The vendor reported that the modifier.regex_replace.php plug-in
        contains an input sanitation flaw related to the ASCII NUL character
        (CVE-2008-1066).
        The vendor reported that the
        _expand_quoted_text() function in libs/Smarty_Compiler.class.php
        contains an input sanitation flaw via multiple vectors (CVE-2008-4810,
        CVE-2008-4811).
        Nine:Situations:Group::bookoo reported that
        the smarty_function_math() function in libs/plugins/function.math.php
        contains input sanitation flaw (CVE-2009-1669).
      
    Impact :
    
        These issues might allow a remote attacker to execute arbitrary PHP
        code.
      
    Workaround :
    
        There is no known workaround at this time."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/201006-13"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All Smarty users should upgrade to an unaffected version:
        # emerge --sync
        # emerge --ask --oneshot --verbose '>=dev-php/smarty-2.6.23'
        NOTE: This is a legacy GLSA. Updates for all affected architectures are
        available since June 2, 2009. It is likely that your system is already
        no longer affected by this issue."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_cwe_id(20, 94, 264);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:smarty");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2010/06/02");
      script_set_attribute(attribute:"plugin_publication_date", value:"2010/06/03");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2010-2019 Tenable Network Security, Inc.");
      script_family(english:"Gentoo Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("qpkg.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
    if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (qpkg_check(package:"dev-php/smarty", unaffected:make_list("ge 2.6.23"), vulnerable:make_list("lt 2.6.23"))) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = qpkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Smarty");
    }
    
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-791-1.NASL
    descriptionThor Larholm discovered that PHPMailer, as used by Moodle, did not correctly escape email addresses. A local attacker with direct access to the Moodle database could exploit this to execute arbitrary commands as the web server user. (CVE-2007-3215) Nigel McNie discovered that fetching https URLs did not correctly escape shell meta-characters. An authenticated remote attacker could execute arbitrary commands as the web server user, if curl was installed and configured. (CVE-2008-4796, MSA-09-0003) It was discovered that Smarty (also included in Moodle), did not correctly filter certain inputs. An authenticated remote attacker could exploit this to execute arbitrary PHP commands as the web server user. (CVE-2008-4810, CVE-2008-4811, CVE-2009-1669) It was discovered that the unused SpellChecker extension in Moodle did not correctly handle temporary files. If the tool had been locally modified, it could be made to overwrite arbitrary local files via symlinks. (CVE-2008-5153) Mike Churchward discovered that Moodle did not correctly filter Wiki page titles in certain areas. An authenticated remote attacker could exploit this to cause cross-site scripting (XSS), which could be used to modify or steal confidential data of other users within the same web domain. (CVE-2008-5432, MSA-08-0022) It was discovered that the HTML sanitizer,
    last seen2020-06-01
    modified2020-06-02
    plugin id39516
    published2009-06-25
    reporterUbuntu Security Notice (C) 2009-2019 Canonical, Inc. / NASL script (C) 2009-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/39516
    titleUbuntu 8.04 LTS / 8.10 : moodle vulnerabilities (USN-791-1)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-791-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(39516);
      script_version("1.23");
      script_cvs_date("Date: 2019/08/02 13:33:02");
    
      script_cve_id("CVE-2007-3215", "CVE-2008-4796", "CVE-2008-4810", "CVE-2008-4811", "CVE-2008-5153", "CVE-2008-5432", "CVE-2008-5619", "CVE-2008-6124", "CVE-2009-0499", "CVE-2009-0500", "CVE-2009-0501", "CVE-2009-0502", "CVE-2009-1171", "CVE-2009-1669");
      script_bugtraq_id(31862, 31887, 32402, 32799, 33610, 33612, 34278, 34918);
      script_xref(name:"USN", value:"791-1");
    
      script_name(english:"Ubuntu 8.04 LTS / 8.10 : moodle vulnerabilities (USN-791-1)");
      script_summary(english:"Checks dpkg output for updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Ubuntu host is missing a security-related patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Thor Larholm discovered that PHPMailer, as used by Moodle, did not
    correctly escape email addresses. A local attacker with direct access
    to the Moodle database could exploit this to execute arbitrary
    commands as the web server user. (CVE-2007-3215)
    
    Nigel McNie discovered that fetching https URLs did not correctly
    escape shell meta-characters. An authenticated remote attacker could
    execute arbitrary commands as the web server user, if curl was
    installed and configured. (CVE-2008-4796, MSA-09-0003)
    
    It was discovered that Smarty (also included in Moodle), did not
    correctly filter certain inputs. An authenticated remote attacker
    could exploit this to execute arbitrary PHP commands as the web server
    user. (CVE-2008-4810, CVE-2008-4811, CVE-2009-1669)
    
    It was discovered that the unused SpellChecker extension in Moodle did
    not correctly handle temporary files. If the tool had been locally
    modified, it could be made to overwrite arbitrary local files via
    symlinks. (CVE-2008-5153)
    
    Mike Churchward discovered that Moodle did not correctly filter Wiki
    page titles in certain areas. An authenticated remote attacker could
    exploit this to cause cross-site scripting (XSS), which could be used
    to modify or steal confidential data of other users within the same
    web domain. (CVE-2008-5432, MSA-08-0022)
    
    It was discovered that the HTML sanitizer, 'Login as' feature, and
    logging in Moodle did not correctly handle certain inputs. An
    authenticated remote attacker could exploit this to generate XSS,
    which could be used to modify or steal confidential data of other
    users within the same web domain. (CVE-2008-5619, CVE-2009-0500,
    CVE-2009-0502, MSA-08-0026, MSA-09-0004, MSA-09-0007)
    
    It was discovered that the HotPot module in Moodle did not correctly
    filter SQL inputs. An authenticated remote attacker could execute
    arbitrary SQL commands as the moodle database user, leading to a loss
    of privacy or denial of service. (CVE-2008-6124, MSA-08-0010)
    
    Kevin Madura discovered that the forum actions and messaging settings
    in Moodle were not protected from cross-site request forgery (CSRF).
    If an authenticated user were tricked into visiting a malicious
    website while logged into Moodle, a remote attacker could change the
    user's configurations or forum content. (CVE-2009-0499, MSA-09-0008,
    MSA-08-0023)
    
    Daniel Cabezas discovered that Moodle would leak usernames from the
    Calendar Export tool. A remote attacker could gather a list of users,
    leading to a loss of privacy. (CVE-2009-0501, MSA-09-0006)
    
    Christian Eibl discovered that the TeX filter in Moodle allowed any
    function to be used. An authenticated remote attacker could post a
    specially crafted TeX formula to execute arbitrary TeX functions,
    potentially reading any file accessible to the web server user,
    leading to a loss of privacy. (CVE-2009-1171, MSA-09-0009)
    
    Johannes Kuhn discovered that Moodle did not correctly validate user
    permissions when attempting to switch user accounts. An authenticated
    remote attacker could switch to any other Moodle user, leading to a
    loss of privacy. (MSA-08-0003)
    
    Hanno Boeck discovered that unconfigured Moodle instances contained
    XSS vulnerabilities. An unauthenticated remote attacker could exploit
    this to modify or steal confidential data of other users within the
    same web domain. (MSA-08-0004)
    
    Debbie McDonald, Mauno Korpelainen, Howard Miller, and Juan Segarra
    Montesinos discovered that when users were deleted from Moodle, their
    profiles and avatars were still visible. An authenticated remote
    attacker could exploit this to store information in profiles even
    after they were removed, leading to spam traffic. (MSA-08-0015,
    MSA-09-0001, MSA-09-0002)
    
    Lars Vogdt discovered that Moodle did not correctly filter certain
    inputs. An authenticated remote attacker could exploit this to
    generate XSS from which they could modify or steal confidential data
    of other users within the same web domain. (MSA-08-0021)
    
    It was discovered that Moodle did not correctly filter inputs for
    group creation, mnet, essay question, HOST param, wiki param, and
    others. An authenticated remote attacker could exploit this to
    generate XSS from which they could modify or steal confidential data
    of other users within the same web domain. (MDL-9288, MDL-11759,
    MDL-12079, MDL-12793, MDL-14806)
    
    It was discovered that Moodle did not correctly filter SQL inputs when
    performing a restore. An attacker authenticated as a Moodle
    administrator could execute arbitrary SQL commands as the moodle
    database user, leading to a loss of privacy or denial of service.
    (MDL-11857).
    
    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."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://usn.ubuntu.com/791-1/"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected moodle package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_core", value:"true");
      script_set_attribute(attribute:"d2_elliot_name", value:"Roundcube 0.2beta RCE");
      script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
      script_cwe_id(20, 59, 79, 89, 94, 264, 352);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:moodle");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.04:-:lts");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.10");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2007/06/14");
      script_set_attribute(attribute:"patch_publication_date", value:"2009/06/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2009/06/25");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2009-2019 Canonical, Inc. / NASL script (C) 2009-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! ereg(pattern:"^(8\.04|8\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 8.04 / 8.10", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"8.04", pkgname:"moodle", pkgver:"1.8.2-1ubuntu4.2")) flag++;
    if (ubuntu_check(osver:"8.10", pkgname:"moodle", pkgver:"1.8.2-1.2ubuntu2.1")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "moodle");
    }
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-1919.NASL
    descriptionSeveral remote vulnerabilities have been discovered in Smarty, a PHP templating engine. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2008-4810 The _expand_quoted_text function allows for certain restrictions in templates, like function calling and PHP execution, to be bypassed. - CVE-2009-1669 The smarty_function_math function allows context-dependent attackers to execute arbitrary commands via shell metacharacters in the equation attribute of the math function.
    last seen2020-06-01
    modified2020-06-02
    plugin id44784
    published2010-02-24
    reporterThis script is Copyright (C) 2010-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/44784
    titleDebian DSA-1919-1 : smarty - several vulnerabilities
  • NASL familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2009-052.NASL
    descriptionA vulnerability has been identified and corrected in php-smarty : The _expand_quoted_text function in libs/Smarty_Compiler.class.php in Smarty 2.6.20 before r2797 allows remote attackers to execute arbitrary PHP code via vectors related to templates and (1) a dollar-sign character, aka php executed in templates
    last seen2020-06-01
    modified2020-06-02
    plugin id37766
    published2009-04-23
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/37766
    titleMandriva Linux Security Advisory : php-smarty (MDVSA-2009:052)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-1691.NASL
    descriptionSeveral remote vulnerabilities have been discovered in Moodle, an online course management system. The following issues are addressed in this update, ranging from cross site scripting to remote code execution. Various cross site scripting issues in the Moodle codebase (CVE-2008-3326, CVE-2008-3325, CVE-2007-3555, CVE-2008-5432, MSA-08-0021, MDL-8849, MDL-12793, MDL-11414, MDL-14806, MDL-10276). Various cross site request forgery issues in the Moodle codebase (CVE-2008-3325, MSA-08-0023). Privilege escalation bugs in the Moodle codebase (MSA-08-0001, MDL-7755). SQL injection issue in the hotpot module (MSA-08-0010). An embedded copy of Smarty had several vulnerabilities (CVE-2008-4811, CVE-2008-4810 ). An embedded copy of Snoopy was vulnerable to cross site scripting (CVE-2008-4796 ). An embedded copy of Kses was vulnerable to cross site scripting (CVE-2008-1502 ).
    last seen2020-06-01
    modified2020-06-02
    plugin id35254
    published2008-12-22
    reporterThis script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/35254
    titleDebian DSA-1691-1 : moodle - several vulnerabilities