Vulnerabilities > CVE-2008-3789 - Incorrect Permission Assignment for Critical Resource vulnerability in Samba 3.2.0/3.2.1/3.2.2
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
Samba 3.2.0 uses weak permissions (0666) for the (1) group_mapping.tdb and (2) group_mapping.ldb files, which allows local users to modify the membership of Unix groups.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
Application | 3 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing Functionality Not Properly Constrained by ACLs In applications, particularly web applications, access to functionality is mitigated by the authorization framework, whose job it is to map ACLs to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application or can run queries for data that he is otherwise not supposed to.
- Privilege Abuse An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.
- Directory Indexing An adversary crafts a request to a target that results in the target listing/indexing the content of a directory as output. One common method of triggering directory contents as output is to construct a request containing a path that terminates in a directory name rather than a file name since many applications are configured to provide a list of the directory's contents when such a request is received. An adversary can use this to explore the directory tree on a target as well as learn the names of files. This can often end up revealing test files, backup files, temporary files, hidden files, configuration files, user accounts, script contents, as well as naming conventions, all of which can be used by an attacker to mount additional attacks.
- 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.
- Exploiting Incorrectly Configured Access Control Security Levels An attacker exploits a weakness in the configuration of access controls and is able to bypass the intended protection that these measures guard against and thereby obtain unauthorized access to the system or network. Sensitive functionality should always be protected with access controls. However configuring all but the most trivial access control systems can be very complicated and there are many opportunities for mistakes. If an attacker can learn of incorrectly configured access security settings, they may be able to exploit this in an attack. Most commonly, attackers would take advantage of controls that provided too little protection for sensitive activities in order to perform actions that should be denied to them. In some circumstances, an attacker may be able to take advantage of overly restrictive access control policies, initiating denial of services (if an application locks because it unexpectedly failed to be granted access) or causing other legitimate actions to fail due to security. The latter class of attacks, however, is usually less severe and easier to detect than attacks based on inadequate security restrictions. This attack pattern differs from CAPEC 1, "Accessing Functionality Not Properly Constrained by ACLs" in that the latter describes attacks where sensitive functionality lacks access controls, where, in this pattern, the access control is present, but incorrectly configured.
Nessus
NASL family Misc. NASL id SAMBA_3_2_2.NASL description The version of Samba running on the remote host is prior to 3.2.3. It is, therefore, affected by a privilege escalation vulnerability. An unauthenticated, remote attacker can exploit this to gain privileged or administrator access to the system. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 122057 published 2019-02-08 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122057 title Samba 3.2.x < 3.2.3 Privilege Escalation Vulnerability NASL family Fedora Local Security Checks NASL id FEDORA_2008-7243.NASL description Security fix for CVE-2008-3789 detailed in the upstream advisory: http://www.samba.org/samba/security/CVE-2008-3789.html 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 seen 2020-06-01 modified 2020-06-02 plugin id 34100 published 2008-09-08 reporter This script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/34100 title Fedora 9 : samba-3.2.3-0.20.fc9 (2008-7243) NASL family SuSE Local Security Checks NASL id SUSE_11_0_SAMBA-080828.NASL description This is an update to version 3.2.3 of Samba. This release includes several bugfixes and performance enhancements for Samba and its components. It is recommended for every user to update to this version. Among several other bugs the following list shows some detail : - Fix a race condition in winbind leading to a crash (bnc#406623). - Fix emptying the printing queue; (bnc#411493). - Fix the webinface SWAT; (bnc#391969). - Fixed a file permission problem. (CVE-2008-3789) bnc#420634 last seen 2020-06-01 modified 2020-06-02 plugin id 40126 published 2009-07-21 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/40126 title openSUSE Security Update : samba (samba-174)
Seebug
bulletinFamily | exploit |
description | CVE(CAN) ID: CVE-2008-3789 Samba是一套实现SMB(Server Messages Block)协议、跨平台进行文件共享和打印共享服务的程序。 Samba在文件创建设置访问权限时存在漏洞,在手工删除/var/lib/samba中的group_mapping.tdb或group_mapping.ldb文件后,samba会重新创建这个文件并将权限设置为0666,这允许访问系统的任意用户修改这个文件。 Samba 3.2.0 目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载: <a href=http://www.samba.org/ target=_blank>http://www.samba.org/</a> |
id | SSV:3937 |
last seen | 2017-11-19 |
modified | 2008-08-29 |
published | 2008-08-29 |
reporter | Root |
title | Samba group_mapping.tdb/group_mapping.ldb创建不安全文件漏洞 |
Statements
contributor | Tomas Hoger |
lastmodified | 2008-08-28 |
organization | Red Hat |
statement | Not vulnerable. This issue did not affect the versions of samba as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5. |
References
- http://www.openwall.com/lists/oss-security/2008/08/26/2
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496073
- http://samba.org/samba/security/CVE-2008-3789.html
- http://www.securitytracker.com/id?1020770
- http://secunia.com/advisories/31601
- http://www.securityfocus.com/bid/30837
- http://www.vupen.com/english/advisories/2008/2440
- https://exchange.xforce.ibmcloud.com/vulnerabilities/44678