Vulnerabilities > CVE-2009-0536 - Permissions, Privileges, and Access Controls vulnerability in IBM AIX
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
NONE Availability impact
NONE Summary
at in bos.rte.cron on IBM AIX 5.2.0, 5.3.0 through 5.3.9, and 6.1.0 through 6.1.2 allows local users to read arbitrary files via unspecified vectors, related to failure to drop root privileges.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 8 |
Common Weakness Enumeration (CWE)
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 family AIX Local Security Checks NASL id AIX_IZ43457.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63779 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63779 title AIX 6.1 TL 0 : at (IZ43457) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The text in the description was extracted from AIX Security # Advisory at_advisory.asc. # include("compat.inc"); if (description) { script_id(63779); script_version("1.3"); script_cvs_date("Date: 2019/09/16 14:12:52"); script_cve_id("CVE-2009-0536"); script_name(english:"AIX 6.1 TL 0 : at (IZ43457)"); script_summary(english:"Check for APAR IZ43457"); script_set_attribute( attribute:"synopsis", value:"The remote AIX host is missing a security patch." ); script_set_attribute( attribute:"description", value: "The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at." ); script_set_attribute( attribute:"see_also", value:"http://aix.software.ibm.com/aix/efixes/security/at_advisory.asc" ); script_set_attribute( attribute:"solution", value:"Install the appropriate interim fix." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N"); script_cwe_id(264); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:6.1"); script_set_attribute(attribute:"vuln_publication_date", value:"2009/02/10"); script_set_attribute(attribute:"patch_publication_date", value:"2009/02/10"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/24"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2019 Tenable Network Security, Inc."); script_family(english:"AIX Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/AIX/lslpp", "Host/local_checks_enabled", "Host/AIX/version"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("aix.inc"); include("misc_func.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if ( ! get_kb_item("Host/AIX/version") ) audit(AUDIT_OS_NOT, "AIX"); if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING); if ( get_kb_item("Host/AIX/emgr_failure" ) ) exit(0, "This iFix check is disabled because : "+get_kb_item("Host/AIX/emgr_failure") ); flag = 0; if (aix_check_ifix(release:"6.1", ml:"00", patch:"IZ43457_00", package:"bos.rte.cron", minfilesetver:"6.1.0.0", maxfilesetver:"6.1.0.1") < 0) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:aix_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family AIX Local Security Checks NASL id AIX_U823854.NASL description The remote host is missing AIX PTF U823854, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 39032 published 2009-06-04 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/39032 title AIX 6.1 : bos.rte.cron (U823854) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were extracted # from AIX Security PTF U823854. The text itself is copyright (C) # International Business Machines Corp. # include("compat.inc"); if (description) { script_id(39032); script_version ("1.5"); script_cvs_date("Date: 2019/09/16 14:12:53"); script_cve_id("CVE-2009-0536"); script_name(english:"AIX 6.1 : bos.rte.cron (U823854)"); script_summary(english:"Check for PTF U823854"); script_set_attribute( attribute:"synopsis", value:"The remote AIX host is missing a vendor-supplied security patch." ); script_set_attribute( attribute:"description", value: "The remote host is missing AIX PTF U823854, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at." ); script_set_attribute( attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=isg1IZ43457" ); script_set_attribute( attribute:"solution", value:"Install the appropriate missing security-related fix." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N"); script_cwe_id(264); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:6.1"); script_set_attribute(attribute:"vuln_publication_date", value:"2009/02/06"); script_set_attribute(attribute:"patch_publication_date", value:"2009/02/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2009/06/04"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2009-2019 Tenable Network Security, Inc."); script_family(english:"AIX Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/AIX/oslevel", "Host/AIX/version", "Host/AIX/lslpp"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("aix.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if ( ! get_kb_item("Host/AIX/version") ) audit(AUDIT_OS_NOT, "AIX"); if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if ( aix_check_patch(ml:"610000", patch:"U823854", package:"bos.rte.cron.6.1.0.2") < 0 ) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:aix_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family AIX Local Security Checks NASL id AIX_U824780.NASL description The remote host is missing AIX PTF U824780, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 38458 published 2009-04-30 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/38458 title AIX 5.3 TL 9 : bos.rte.cron (U824780) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were extracted # from AIX Security PTF U824780. The text itself is copyright (C) # International Business Machines Corp. # include("compat.inc"); if (description) { script_id(38458); script_version ("1.4"); script_cvs_date("Date: 2019/09/16 14:12:53"); script_cve_id("CVE-2009-0536"); script_name(english:"AIX 5.3 TL 9 : bos.rte.cron (U824780)"); script_summary(english:"Check for PTF U824780"); script_set_attribute( attribute:"synopsis", value:"The remote AIX host is missing a vendor-supplied security patch." ); script_set_attribute( attribute:"description", value: "The remote host is missing AIX PTF U824780, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at." ); script_set_attribute( attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=isg1IZ43456" ); script_set_attribute( attribute:"solution", value:"Install the appropriate missing security-related fix." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N"); script_cwe_id(264); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:5.3"); script_set_attribute(attribute:"vuln_publication_date", value:"2009/02/06"); script_set_attribute(attribute:"patch_publication_date", value:"2009/02/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2009/04/30"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2009-2019 Tenable Network Security, Inc."); script_family(english:"AIX Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/AIX/oslevel", "Host/AIX/version", "Host/AIX/lslpp"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("aix.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if ( ! get_kb_item("Host/AIX/version") ) audit(AUDIT_OS_NOT, "AIX"); if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if ( aix_check_patch(ml:"530009", patch:"U824780", package:"bos.rte.cron.5.3.9.1") < 0 ) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:aix_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family AIX Local Security Checks NASL id AIX_U825550.NASL description The remote host is missing AIX PTF U825550, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 39181 published 2009-06-04 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/39181 title AIX 6.1 TL 2 : bos.rte.cron (U825550) NASL family AIX Local Security Checks NASL id AIX_IZ43456.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63778 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63778 title AIX 5.3 TL 9 : at (IZ43456) NASL family AIX Local Security Checks NASL id AIX_IZ43454.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63776 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63776 title AIX 5.3 TL 7 : at (IZ43454) NASL family AIX Local Security Checks NASL id AIX_IZ43453.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63775 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63775 title AIX 5.3 TL 0 : at (IZ43453) NASL family AIX Local Security Checks NASL id AIX_IZ43452.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63774 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63774 title AIX 5.2 TL 0 : at (IZ43452) NASL family AIX Local Security Checks NASL id AIX_U823619.NASL description The remote host is missing AIX PTF U823619, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 39811 published 2009-07-17 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/39811 title AIX 5.2 TL 10 : bos.rte.cron (U823619) NASL family AIX Local Security Checks NASL id AIX_U825004.NASL description The remote host is missing AIX PTF U825004, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 38579 published 2009-04-30 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/38579 title AIX 5.3 TL 7 : bos.rte.cron (U825004) NASL family AIX Local Security Checks NASL id AIX_U822098.NASL description The remote host is missing AIX PTF U822098, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 38422 published 2009-04-30 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/38422 title AIX 5.3 TL 8 : bos.rte.cron (U822098) NASL family AIX Local Security Checks NASL id AIX_IZ43459.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63781 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63781 title AIX 6.1 TL 2 : at (IZ43459) NASL family AIX Local Security Checks NASL id AIX_U821986.NASL description The remote host is missing AIX PTF U821986, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 38331 published 2009-04-30 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/38331 title AIX 5.3 TL 6 : bos.rte.cron (U821986) NASL family AIX Local Security Checks NASL id AIX_IZ43455.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63777 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63777 title AIX 5.3 TL 8 : at (IZ43455) NASL family AIX Local Security Checks NASL id AIX_IZ43458.NASL description The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 63780 published 2013-01-24 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63780 title AIX 6.1 TL 1 : at (IZ43458) NASL family AIX Local Security Checks NASL id AIX_U825668.NASL description The remote host is missing AIX PTF U825668, which is related to the security of the package bos.rte.cron. The at command does not drop permissions when reading certain files. A local attacker may exploit this error to read any file on the system because the command is setuid root. The following file is vulnerable : /usr/bin/at. last seen 2020-06-01 modified 2020-06-02 plugin id 39250 published 2009-06-04 reporter This script is Copyright (C) 2009-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/39250 title AIX 6.1 TL 1 : bos.rte.cron (U825668)
Oval
| accepted | 2009-09-14T04:00:07.840-04:00 | ||||||||||||||||||||||||||||||||||||
| class | vulnerability | ||||||||||||||||||||||||||||||||||||
| contributors |
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| definition_extensions |
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| description | at in bos.rte.cron on IBM AIX 5.2.0, 5.3.0 through 5.3.9, and 6.1.0 through 6.1.2 allows local users to read arbitrary files via unspecified vectors, related to failure to drop root privileges. | ||||||||||||||||||||||||||||||||||||
| family | unix | ||||||||||||||||||||||||||||||||||||
| id | oval:org.mitre.oval:def:6155 | ||||||||||||||||||||||||||||||||||||
| status | accepted | ||||||||||||||||||||||||||||||||||||
| submitted | 2009-08-01T16:42:25-04:00 | ||||||||||||||||||||||||||||||||||||
| title | at allows local users to read arbitrary files. | ||||||||||||||||||||||||||||||||||||
| version | 42 |
References
- http://aix.software.ibm.com/aix/efixes/security/at_advisory.asc
- http://osvdb.org/51952
- http://secunia.com/advisories/33915
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43452
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43453
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43454
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43455
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43456
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43457
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43458
- http://www.ibm.com/support/docview.wss?uid=isg1IZ43459
- http://www.securityfocus.com/bid/33730
- http://www.securitytracker.com/id?1021704
- http://www.vupen.com/english/advisories/2009/0405
- http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=4558
- https://exchange.xforce.ibmcloud.com/vulnerabilities/48660
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6155