ID CVE-2012-0878
Summary Paste Script 1.7.5 and earlier does not properly set group memberships during execution with root privileges, which might allow remote attackers to bypass intended file-access restrictions by leveraging a web application that uses the local filesystem.
References
Vulnerable Configurations
  • cpe:2.3:a:pythonpaste:paste:1.7.5
    cpe:2.3:a:pythonpaste:paste:1.7.5
CVSS
Base: 5.1 (as of 02-05-2012 - 10:44)
Impact:
Exploitability:
CWE CWE-264
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.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Access
VectorComplexityAuthentication
NETWORK HIGH NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2012-1206.NASL
    description From Red Hat Security Advisory 2012:1206 : An updated python-paste-script package that fixes one security issue is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. Python Paste provides middleware for building and running Python web applications. The python-paste-script package includes paster, a tool for working with and running Python Paste applications. It was discovered that paster did not drop supplementary group privileges when started by the root user. Running 'paster serve' as root to start a Python web application that will run as a non-root user and group resulted in that application running with root group privileges. This could possibly allow a remote attacker to gain access to files that should not be accessible to the application. (CVE-2012-0878) All paster users should upgrade to this updated package, which contains a backported patch to resolve this issue. All running paster instances configured to drop privileges must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-08-13
    plugin id 68604
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68604
    title Oracle Linux 6 : python-paste-script (ELSA-2012-1206)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20120827_PYTHON_PASTE_SCRIPT_ON_SL6_X.NASL
    description Python Paste provides middleware for building and running Python web applications. The python-paste-script package includes paster, a tool for working with and running Python Paste applications. It was discovered that paster did not drop supplementary group privileges when started by the root user. Running 'paster serve' as root to start a Python web application that will run as a non-root user and group resulted in that application running with root group privileges. This could possibly allow a remote attacker to gain access to files that should not be accessible to the application. (CVE-2012-0878) All paster users should upgrade to this updated package, which contains a backported patch to resolve this issue. All running paster instances configured to drop privileges must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 61694
    published 2012-08-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61694
    title Scientific Linux Security Update : python-paste-script on SL6.x i386/x86_64
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-2413.NASL
    description This update fixes a security flaw with Paster that prevents it from properly dropping privileges when run as root. 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 2019-02-21
    modified 2015-10-20
    plugin id 58622
    published 2012-04-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=58622
    title Fedora 15 : python-paste-script-1.7.5-4.fc15 (2012-2413)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2012-1206.NASL
    description An updated python-paste-script package that fixes one security issue is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. Python Paste provides middleware for building and running Python web applications. The python-paste-script package includes paster, a tool for working with and running Python Paste applications. It was discovered that paster did not drop supplementary group privileges when started by the root user. Running 'paster serve' as root to start a Python web application that will run as a non-root user and group resulted in that application running with root group privileges. This could possibly allow a remote attacker to gain access to files that should not be accessible to the application. (CVE-2012-0878) All paster users should upgrade to this updated package, which contains a backported patch to resolve this issue. All running paster instances configured to drop privileges must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 61682
    published 2012-08-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61682
    title CentOS 6 : python-paste-script (CESA-2012:1206)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-2418.NASL
    description This update fixes a security flaw with Paster that prevents it from properly dropping privileges when run as root. 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 2019-02-21
    modified 2015-10-20
    plugin id 58623
    published 2012-04-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=58623
    title Fedora 16 : python-paste-script-1.7.5-4.fc16 (2012-2418)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2012-1206.NASL
    description An updated python-paste-script package that fixes one security issue is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. Python Paste provides middleware for building and running Python web applications. The python-paste-script package includes paster, a tool for working with and running Python Paste applications. It was discovered that paster did not drop supplementary group privileges when started by the root user. Running 'paster serve' as root to start a Python web application that will run as a non-root user and group resulted in that application running with root group privileges. This could possibly allow a remote attacker to gain access to files that should not be accessible to the application. (CVE-2012-0878) All paster users should upgrade to this updated package, which contains a backported patch to resolve this issue. All running paster instances configured to drop privileges must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 61689
    published 2012-08-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61689
    title RHEL 6 : python-paste-script (RHSA-2012:1206)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-2302.NASL
    description This update fixes a security flaw with Paster that prevents it from properly dropping privileges when run as root. 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 2019-02-21
    modified 2015-10-20
    plugin id 58686
    published 2012-04-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=58686
    title Fedora 17 : python-paste-script-1.7.5-4.fc17 (2012-2302)
redhat via4
advisories
bugzilla
id 796790
title as root
oval
AND
  • comment python-paste-script is earlier than 0:1.7.3-5.el6_3
    oval oval:com.redhat.rhsa:tst:20121206005
  • comment python-paste-script is signed with Red Hat redhatrelease2 key
    oval oval:com.redhat.rhsa:tst:20121206006
  • OR
    • comment Red Hat Enterprise Linux 6 Client is installed
      oval oval:com.redhat.rhba:tst:20111656001
    • comment Red Hat Enterprise Linux 6 Server is installed
      oval oval:com.redhat.rhba:tst:20111656002
    • comment Red Hat Enterprise Linux 6 Workstation is installed
      oval oval:com.redhat.rhba:tst:20111656003
    • comment Red Hat Enterprise Linux 6 ComputeNode is installed
      oval oval:com.redhat.rhba:tst:20111656004
rhsa
id RHSA-2012:1206
released 2012-08-27
severity Moderate
title RHSA-2012:1206: python-paste-script security update (Moderate)
rpms python-paste-script-0:1.7.3-5.el6_3
refmap via4
confirm
misc https://bitbucket.org/ianb/pastescript/pull-request/3/fix-group-permissions-for-pastescriptserve
mlist
  • [oss-security] 20120223 CVE Request -- python-paste-script: Supplementary groups not dropped when started an application with "paster serve" as root
  • [oss-security] 20120223 Re: CVE Request -- python-paste-script: Supplementary groups not dropped when started an application with "paster serve" as root
secunia
  • 48812
  • 50410
Last major update 01-04-2013 - 23:15
Published 01-05-2012 - 15:55
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