Vulnerabilities > CVE-2006-3084 - Permissions, Privileges, and Access Controls vulnerability in multiple products

047910
CVSS 7.2 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
low complexity
heimdal
mit
CWE-264
nessus

Summary

The (1) ftpd and (2) ksu programs in (a) MIT Kerberos 5 (krb5) up to 1.5, and 1.4.x before 1.4.4, and (b) Heimdal 0.7.2 and earlier, do not check return codes for setuid calls, which might allow local users to gain privileges by causing setuid to fail to drop privileges. NOTE: as of 20060808, it is not known whether an exploitable attack scenario exists for these issues.

Vulnerable Configurations

Part Description Count
Application
Heimdal
1
Application
Mit
5

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 familyFedora Local Security Checks
    NASL idFEDORA_2007-034.NASL
    descriptionThis update incorporates a fix for a recently-announced bug found in the kadmind daemon. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id24190
    published2007-01-17
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/24190
    titleFedora Core 5 : krb5-1.4.3-5.3 (2007-034)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200608-15.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200608-15 (MIT Kerberos 5: Multiple local privilege escalation vulnerabilities) Unchecked calls to setuid() in krshd and v4rcp, as well as unchecked calls to seteuid() in kftpd and in ksu, have been found in the MIT Kerberos 5 program suite and may lead to a local root privilege escalation. Impact : A local attacker could exploit this vulnerability to execute arbitrary code with elevated privileges. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id22214
    published2006-08-14
    reporterThis script is Copyright (C) 2006-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/22214
    titleGLSA-200608-15 : MIT Kerberos 5: Multiple local privilege escalation vulnerabilities
  • NASL familySuSE Local Security Checks
    NASL idSUSE_KRB5-APPS-CLIENTS-1937.NASL
    descriptionVarious return checks of setuid() and seteuid() calls have been fixed in kerberos client and server applications. If these applications are setuid, it might have been possible for local attackers to gain root access (CVE-2006-3083). We are not affected by the seteuid() problems, tracked by CVE-2006-3084.
    last seen2020-06-01
    modified2020-06-02
    plugin id27312
    published2007-10-17
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/27312
    titleopenSUSE 10 Security Update : krb5-apps-clients (krb5-apps-clients-1937)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-334-1.NASL
    descriptionMichael Calmer and Marcus Meissner discovered that several krb5 tools did not check the return values from setuid() system calls. On systems that have configured user process limits, it may be possible for an attacker to cause setuid() to fail via resource starvation. In that situation, the tools will not reduce their privilege levels, and will continue operation as the root user. By default, Ubuntu does not ship with user process limits. Please note that these packages are not officially supported by Ubuntu (they are in the
    last seen2020-06-01
    modified2020-06-02
    plugin id27913
    published2007-11-10
    reporterUbuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/27913
    titleUbuntu 5.04 / 5.10 / 6.06 LTS : krb5 vulnerabilities (USN-334-1)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-1146.NASL
    descriptionIn certain application programs packaged in the MIT Kerberos 5 source distribution, calls to setuid() and seteuid() are not always checked for success and may fail with some PAM configurations. A local user could exploit one of these vulnerabilities to result in privilege escalation. No exploit code is known to exist at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id22688
    published2006-10-14
    reporterThis script is Copyright (C) 2006-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/22688
    titleDebian DSA-1146-1 : krb5 - programming error
  • NASL familyMandriva Local Security Checks
    NASL idMANDRAKE_MDKSA-2006-139.NASL
    descriptionA flaw was discovered in some bundled Kerberos-aware packages that would fail to check the results of the setuid() call. This call can fail in some circumstances on the Linux 2.6 kernel if certain user limits are reached, which could be abused by a local attacker to get the applications to continue to run as root, possibly leading to an elevation of privilege. Updated packages have been patched to correct this issue.
    last seen2020-06-01
    modified2020-06-02
    plugin id23888
    published2006-12-16
    reporterThis script is Copyright (C) 2006-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/23888
    titleMandrake Linux Security Advisory : krb5 (MDKSA-2006:139)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200608-21.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200608-21 (Heimdal: Multiple local privilege escalation vulnerabilities) The ftpd and rcp applications provided by Heimdal fail to check the return value of calls to seteuid(). Impact : A local attacker could exploit this vulnerability to execute arbitrary code with elevated privileges. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id22283
    published2006-08-30
    reporterThis script is Copyright (C) 2006-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/22283
    titleGLSA-200608-21 : Heimdal: Multiple local privilege escalation vulnerabilities
  • NASL familySuSE Local Security Checks
    NASL idSUSE_KRB5-APPS-SERVERS-1938.NASL
    descriptionVarious return checks of setuid() and seteuid() calls have been fixed in kerberos client and server applications. If these applications are setuid, it might have been possible for local attackers to gain root access. (CVE-2006-3083) We are not affected by the seteuid() problems, tracked by CVE-2006-3084.
    last seen2020-06-01
    modified2020-06-02
    plugin id29496
    published2007-12-13
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/29496
    titleSuSE 10 Security Update : krb5-apps-servers and krb5-apps-clients (ZYPP Patch Number 1938)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-329-1.NASL
    descriptionVarious flaws have been reported that allow an attacker to execute arbitrary code with user privileges by tricking the user into opening a malicious email containing JavaScript. Please note that JavaScript is disabled by default for emails, and it is not recommended to enable it. (CVE-2006-3113, CVE-2006-3802, CVE-2006-3803, CVE-2006-3805, CVE-2006-3806, CVE-2006-3807, CVE-2006-3809, CVE-2006-3810, CVE-2006-3811, CVE-2006-3812) A buffer overflow has been discovered in the handling of .vcard files. By tricking a user into importing a malicious vcard into his contacts, this could be exploited to execute arbitrary code with the user
    last seen2020-06-01
    modified2020-06-02
    plugin id27908
    published2007-11-10
    reporterUbuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/27908
    titleUbuntu 6.06 LTS : mozilla-thunderbird vulnerabilities (USN-329-1)