Vulnerabilities > CVE-2008-1668 - Permissions, Privileges, and Access Controls vulnerability in HP Hp-Ux 11.11

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
hp
CWE-264
critical
nessus

Summary

ftpd.c in (1) wu-ftpd 2.4.2 and (2) ftpd in HP HP-UX B.11.11 assigns uid 0 to the FTP client in certain operating-system misconfigurations in which PAM authentication can succeed even though no passwd entry is available for a user, which allows remote attackers to gain privileges, as demonstrated by a login attempt for an LDAP account when nsswitch.conf does not specify LDAP for passwd information.

Vulnerable Configurations

Part Description Count
OS
Hp
1

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • 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.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familyHP-UX Local Security Checks
    NASL idHPUX_PHNE_38458.NASL
    descriptions700_800 11.11 ftpd(1M) and ftp(1) patch : A potential security vulnerability has been identified with HP-UX running ftpd. The vulnerability could be exploited to allow remote privileged access.
    last seen2020-06-01
    modified2020-06-02
    plugin id33936
    published2008-08-19
    reporterThis script is Copyright (C) 2008-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/33936
    titleHP-UX PHNE_38458 : HP-UX Running ftpd, Remote Privileged Access (HPSBUX02356 SSRT080051 rev.1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and patch checks in this plugin were 
    # extracted from HP patch PHNE_38458. The text itself is
    # copyright (C) Hewlett-Packard Development Company, L.P.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(33936);
      script_version("1.21");
      script_cvs_date("Date: 2018/08/10 18:07:07");
    
      script_cve_id("CVE-2008-1668");
      script_xref(name:"HP", value:"emr_na-c01525562");
      script_xref(name:"HP", value:"HPSBUX02356");
      script_xref(name:"HP", value:"SSRT080051");
    
      script_name(english:"HP-UX PHNE_38458 : HP-UX Running ftpd, Remote Privileged Access (HPSBUX02356 SSRT080051 rev.1)");
      script_summary(english:"Checks for the patch in the swlist output");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote HP-UX host is missing a security-related patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "s700_800 11.11 ftpd(1M) and ftp(1) patch : 
    
    A potential security vulnerability has been identified with HP-UX
    running ftpd. The vulnerability could be exploited to allow remote
    privileged access."
      );
      # http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01525562
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?a77d6e97"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Install patch PHNE_38458 or subsequent."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
      script_cwe_id(264);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:hp:hp-ux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2008/08/12");
      script_set_attribute(attribute:"plugin_publication_date", value:"2008/08/19");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2008-2018 Tenable Network Security, Inc.");
      script_family(english:"HP-UX Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/HP-UX/version", "Host/HP-UX/swlist");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("hpux.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/HP-UX/version")) audit(AUDIT_OS_NOT, "HP-UX");
    if (!get_kb_item("Host/HP-UX/swlist")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    if (!hpux_check_ctx(ctx:"11.11"))
    {
      exit(0, "The host is not affected since PHNE_38458 applies to a different OS release.");
    }
    
    patches = make_list("PHNE_38458", "PHNE_40774");
    foreach patch (patches)
    {
      if (hpux_installed(app:patch))
      {
        exit(0, "The host is not affected because patch "+patch+" is installed.");
      }
    }
    
    
    flag = 0;
    if (hpux_check_patch(app:"InternetSrvcs.INET-ENG-A-MAN", version:"B.11.11")) flag++;
    if (hpux_check_patch(app:"InternetSrvcs.INETSVCS-RUN", version:"B.11.11")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:hpux_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyFTP
    NASL idHPUX_FTPD_PRIV_ESCALATION.NASL
    descriptionAccording to its banner, the version of the HP-UX FTP server running on the remote host is at a patch level before PHNE_38458. Such versions reportedly contain a vulnerability that in certain account configurations could be exploited by an anonymous remote attacker to gain privileged access. Note that successful exploitation requires that pam is used for authenticating FTP users and that pam authentication passes when a user tries to log in while getpwnam returns NULL. This could occur, for example, if LDAP is used for pam authentication, the nsswitch.conf file does not include
    last seen2020-06-01
    modified2020-06-02
    plugin id33899
    published2008-08-15
    reporterThis script is Copyright (C) 2008-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/33899
    titleHP-UX ftpd PAM Authentication Configuration Weakness Authentication Bypass

Oval

accepted2014-03-24T04:01:49.334-04:00
classvulnerability
contributors
  • nameMichael Wood
    organizationHewlett-Packard
  • nameSushant Kumar Singh
    organizationHewlett-Packard
descriptionftpd.c in (1) wu-ftpd 2.4.2 and (2) ftpd in HP HP-UX B.11.11 assigns uid 0 to the FTP client in certain operating-system misconfigurations in which PAM authentication can succeed even though no passwd entry is available for a user, which allows remote attackers to gain privileges, as demonstrated by a login attempt for an LDAP account when nsswitch.conf does not specify LDAP for passwd information.
familyunix
idoval:org.mitre.oval:def:5971
statusaccepted
submitted2008-08-12T16:30:32.000-04:00
titleHP-UX Running ftpd, Remote Privileged Access
version40

Seebug

bulletinFamilyexploit
descriptionBUGTRAQ ID: 30666 CVE ID:CVE-2008-1668 CNCVE ID:CNCVE-20081668 HP-UX是一款商业性质的操作系统。 HP-UX包含的'ftpd'存在未明特权提升问题,远程攻击者可以利用漏洞获得高权限获得对系统的控制。 目前没有详细漏洞细节提供。 HP-UX B.11.11 可联系供应商获得补丁信息: <a href=http://www.hp.com/products1/unix/operating/ target=_blank>http://www.hp.com/products1/unix/operating/</a>
idSSV:3845
last seen2017-11-19
modified2008-08-14
published2008-08-14
reporterRoot
titleHP-UX 'ftpd'未明远程特权提升漏洞

Statements

contributorJoshua Bressers
lastmodified2008-10-13
organizationRed Hat
statementNot vulnerable. This flaw does not affect teh version of wu-ftpd as shipped in Red Hat Enterprise Linux 2.1.