Vulnerabilities > CVE-2005-1122 - USE of Externally-Controlled Format String vulnerability in Monkey-Project Monkey

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
monkey-project
CWE-134
nessus

Summary

Format string vulnerability in cgi.c for Monkey daemon (monkeyd) before 0.9.1 allows remote attackers to cause a denial of service and possibly execute arbitrary code via an HTTP GET request containing double-encoded format string specifiers (aka "double expansion error").

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Format String Injection
    An attacker includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An attacker can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the attacker can write to the program stack.
  • String Format Overflow in syslog()
    This attack targets the format string vulnerabilities in the syslog() function. An attacker would typically inject malicious input in the format string parameter of the syslog function. This is a common problem, and many public vulnerabilities and associated exploits have been posted.

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200504-14.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200504-14 (monkeyd: Multiple vulnerabilities) Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a double expansion error in monkeyd, resulting in a format string vulnerability. Ciaran McCreesh of Gentoo Linux discovered a Denial of Service vulnerability, a syntax error caused monkeyd to zero out unallocated memory should a zero byte file be requested. Impact : The format string vulnerability could allow an attacker to send a specially crafted request to the monkeyd server, resulting in the execution of arbitrary code with the permissions of the user running monkeyd. The DoS vulnerability could allow an attacker to disrupt the operation of the web server, should a zero byte file be accessible. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id18061
    published2005-04-16
    reporterThis script is Copyright (C) 2005-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/18061
    titleGLSA-200504-14 : monkeyd: 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 200504-14.
    #
    # The advisory text is Copyright (C) 2001-2015 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(18061);
      script_version("1.14");
      script_cvs_date("Date: 2019/08/02 13:32:42");
    
      script_cve_id("CVE-2005-1122", "CVE-2005-1123");
      script_xref(name:"GLSA", value:"200504-14");
    
      script_name(english:"GLSA-200504-14 : monkeyd: 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-200504-14
    (monkeyd: Multiple vulnerabilities)
    
        Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a
        double expansion error in monkeyd, resulting in a format string
        vulnerability. Ciaran McCreesh of Gentoo Linux discovered a Denial of
        Service vulnerability, a syntax error caused monkeyd to zero out
        unallocated memory should a zero byte file be requested.
      
    Impact :
    
        The format string vulnerability could allow an attacker to send a
        specially crafted request to the monkeyd server, resulting in the
        execution of arbitrary code with the permissions of the user running
        monkeyd. The DoS vulnerability could allow an attacker to disrupt the
        operation of the web server, should a zero byte file be accessible.
      
    Workaround :
    
        There is no known workaround at this time."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/200504-14"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All monkeyd users should upgrade to the latest version:
        # emerge --sync
        # emerge --ask --oneshot --verbose '>=www-servers/monkeyd-0.9.1'"
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:monkeyd");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2005/04/15");
      script_set_attribute(attribute:"plugin_publication_date", value:"2005/04/16");
      script_set_attribute(attribute:"vuln_publication_date", value:"2005/04/15");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2005-2019 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:"www-servers/monkeyd", unaffected:make_list("ge 0.9.1"), vulnerable:make_list("lt 0.9.1"))) 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, "monkeyd");
    }
    
  • NASL familyCGI abuses
    NASL idMONKEYD_091.NASL
    descriptionThe version of the Monkey HTTP Server installed on the remote host suffers from the following flaws : - A Format String Vulnerability A remote attacker may be able to execute arbitrary code with the permissions of the user running monkeyd by sending a specially- crafted request. - A Denial of Service Vulnerability Repeatedly requesting a zero-byte length file, if one exists, could cause the web server to crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id18059
    published2005-04-15
    reporterThis script is Copyright (C) 2005-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/18059
    titleMonkey HTTP Daemon (monkeyd) < 0.9.1 Multiple Vulnerabilities