8143037 2002-03-14 13:46 -0500 /427 rader/ CERT Advisory <cert-advisory@cert.org>
Sänt av: owner-root@lysator.liu.se
Importerad: 2002-03-15 01:28 av Brevbäraren
Extern mottagare: cert-advisory@cert.org
Mottagare: Bellman -- The Recursive Hacker <17184>
Mottaget: 2002-03-15 01:45
Mottagare: Bugtraq (import) <21440>
Sänt: 2002-03-15 05:57
Ärende: CERT Advisory CA-2002-08 Multiple vulnerabilities in Oracle Servers
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From: CERT Advisory <cert-advisory@cert.org>
To: cert-advisory@cert.org
Message-ID: <CA-2002-08.1@cert.org>
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CERT Advisory CA-2002-08 Multiple vulnerabilities in Oracle Servers
Original release date: March 14, 2002
Last revised: --
Source: CERT/CC
A complete revision history can be found at the end of this file.
Systems Affected
* Systems running Oracle8i Database
* Systems running Oracle9i Database
* Systems running Oracle9i Application Server
Overview
Multiple vulnerabilities in Oracle Application Server have
recently been discovered. These vulnerabilities include
buffer overflows, insecure default settings, failures to
enforce access controls, and failure to validate input. The
impacts of these vulnerabilities include the execution of
arbitrary commands or code, denial of service, and
unauthorized access to sensitive information.
I. Description
Oracle Application Server includes a web server based on the Apache
HTTP Server. Oracle extends the web server with a number of different
components that can be used provide interfaces to database
applications. These components include, but are not limited to, a
Procedural Language/Structured Query Language (PL/SQL) module, Java
Server Pages, XSQL Servlets, and Simple Object Access Protocol (SOAP)
applications.
The vulnerabilities referenced in this advisory were
reported in several publications by David Litchfield of
NGSSoftware:
* Hackproofing Oracle Application Server
http://www.nextgenss.com/papers/hpoas.pdf
* NGSSoftware Insight Security Research Advisory #NISR20122001
http://www.nextgenss.com/advisories/plsql.txt
* NGSSoftware Insight Security Research Advisory #NISR06022002A
http://www.nextgenss.com/advisories/oraplsextproc.txt
* NGSSOftware Insight Security Research Advisory #NISR06022002B
http://www.nextgenss.com/advisories/oraplsbos.txt
* NGSSoftware Insight Security Research Advisory #NISR06022002C
http://www.nextgenss.com/advisories/orajsa.txt
http://www.nextgenss.com/advisories/orajsp.txt
For the complete list of Oracle-related vulnerabilities
published by the CERT/CC, please search the Vulnerability Notes
Database using the term 'Oracle'. Details about specific
vulnerabilies can be found in the appropriate vulnerability note.
Oracle has addressed these vulnerabilities with patches and
recommended configuration changes. For more information please see the
vendor information for Oracle in Appendix A.
Buffer overflows
Several buffer-overflow vulnerabilities exist in the way the PL/SQL
module handles HTTP requests and configuration parameters. Default
configuration settings in a range of components are insecure, and
different components fail to apply access restrictions uniformly.
These vulnerabilities expose both the systems running Oracle
Application Server and the information held in the underlying
databases to undue risk.
Two more buffer overflow vulnerabilities exist in code that processes
configuration parameters. These parameters processes configuration
parameters that can be specified via the PL/SQL gateway web
administration interface. By default, access to the PL/SQL gateway web
administration interface is not restricted [VU#611776].
VU#500203 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via help page request
VU#313280 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via HTTP Location header
VU#750299 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via HTTP request
VU#878603 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via HTTP Authorization header
VU#659043 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via Database Access Descriptor password
VU#923395 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via cache directory name
Insecure default configurations
The default installation of Oracle Application Server
includes a number of insecure configuration settings, such as
well-known default passwords and unrestricted access to
applications and sensitive information.
VU#307835 - Oracle9i Application Server OWA_UTIL procedures
expose sensitive information
VU#736923 - Oracle 9iAS SOAP components allow anonymous
users to deploy applications by default
VU#611776 - Oracle9i Application Server PL/SQL Gateway web
administration interface uses null authentication by default
VU#698467 - Oracle 9iAS default configuration allows access
to "globals.jsa" file
VU#476619 - Oracle 9iAS default configuration allows arbitrary
users to view sensitive configuration files
VU#712723 - Oracle 9iAS default configuration uses well-known
default passwords
VU#168795 - Oracle 9iAS allows anonymous remote users to
view sensitive Apache services by default
VU#278971 - Oracle 9i Application Server does not adequately
handle requests for nonexistent JSP files thereby disclosing web
folder path information
Failure to enforce access controls
Oracle Application Server does not uniformly enforce access
restrictions. Different components do not adequately check
authorization before granting access to protected resources.
VU#180147 - Oracle 9i Database Server PL/SQL module allows
remote command execution without authentication
VU#193523 - Oracle 9i Application Server allows unauthenticated
access to PL/SQL applications via alternate Database Access
Descriptor
VU#977251 - Oracle 9iAS XSQL Servlet ignores file permissions
allowing arbitrary users to view sensitive configuration files
VU#547459 - Oracle 9iAS creates temporary files when processing
JSP requests that are world-readable
Failure to validate input
In one case, the PL/SQL module does not properly handle a
malformed HTTP request.
VU#805915 - Oracle9i Application Server Apache PL/SQL module does
not properly handle HTTP Authorization header
II. Impact
The impacts of these vulnerabilities include the remote execution of
arbitrary code, remote execution of commands and SQL queries,
disclosure of sensitive information, and denial of service.
Remote execution of arbitrary commands and code
This section contains vulnerabilities that permit a remote
intruder to cause a denial of service or execute arbitrary
commands, code, or queries on the system.
Some of these vulnerabilities allow execution with the
privileges of the Apache process. On UNIX systems, the Apache
process typically runs as the "oracle" user. On Windows systems,
the Apache service typically runs as the SYSTEM user;
therefore, an attacker could gain complete control of the system
by exploiting these vulnerabilities.
VU#500203 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via help page request
VU#313280 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via help page request Location: header
VU#750299 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via HTTP request
VU#878603 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via HTTP Authorization header password
parameter
VU#659043 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via Database Access Descriptor password
VU#923395 - Oracle9i Application Server Apache PL/SQL module
vulnerable to buffer overflow via cache directory name
VU#180147 - Oracle 9i Database Server PL/SQL module allows
remote command execution without authentication
VU#736923 - Oracle 9iAS SOAP components allow anonymous
users to deploy applications by default
VU#712723 - Oracle 9iAS default configuration uses well-known
default passwords
VU#611776 - Oracle9i Application Server PL/SQL Gateway web
administration interface uses null authentication by default
Unauthorized access to sensitive information
A number of vulnerabilities disclose configuration information or
expose data stored in underlying databases. Also, insecure
applications could allow an intruder to execute SQL queries. Oracle
system programmers may wish to examine these vulnerabilities in
Oracle's sample pages to prevent similar vulnerabilities in their own
Oracle applications.
VU#307835 - Oracle9i Application Server OWA_UTIL PL/SQL
application exposes procedures that are remotely accessible by
arbitrary users
VU#193523 - Oracle 9i Application Server allows unauthenticated
access to PL/SQL applications via alternate Database Access
Descriptor
VU#698467 - Oracle 9iAS default configuration allows access
to "globals.jsa" file
VU#476619 - Oracle 9iAS default configuration allows arbitrary
users to view sensitive configuration files
VU#977251 - Oracle 9iAS XSQL Servlet ignores file permissions
allowing arbitrary users to view sensitive configuration files
VU#168795 - Oracle 9iAS allows anonymous remote users to
view sensitive Apache services by default
VU#278971 - Oracle 9i Application Server does not adequately
handle requests for nonexistent JSP files thereby disclosing web
folder path information
VU#547459 - Oracle 9iAS creates temporary files when processing
JSP requests that are world-readable
Denial of service
In the case where the PL/SQL module does not properly handle an HTTP
request, a denial-of-service vulnerability exists. Also, an
unsuccessful attempt to exploit a buffer overflow vulnerability could
crash the Apache service.
VU#805915 - Oracle9i Application Server Apache PL/SQL module does
not properly handle HTTP Authorization header
III. Solution
Oracle has provided patches and workarounds that address most of these
vulnerabilities. Sites using Oracle Application Server are encouraged
to install the appropriate patches and make the recommended
configuration changes provided by Oracle.
Solutions and workarounds for specific vulnerabilities can be
found in individual vulnerability notes and in the following
Oracle security alerts:
* Oracle Security Alert #29
http://otn.oracle.com/deploy/security/pdf/plsextproc_alert.pdf
* Oracle Security Alert #28
http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf
* Oracle Security Alert #25
http://otn.oracle.com/deploy/security/pdf/modplsql.pdf
* Oracle Security Alert #22
http://otn.oracle.com/deploy/security/pdf/ias_soap_alert.pdf
Security and patch information for Oracle products are
available at the following locations:
* Oracle Security Alerts
http://otn.oracle.com/deploy/security/alerts.htm
* MetaLink (registration required)
http://metalink.oracle.com/
Sites using Oracle Application Server may also find David
Litchfield's Hackproofing Oracle Application Server paper useful
in describing the impacts and various interactions of these
vulnerabilities.
Apply a patch
Oracle has released patches that address some of these
vulnerabilities. Patch information can be found in Oracle Security
Alert #28 and Oracle Security Alert #25 and on the MetaLink web site
(registration required).
Secure default configuration
Oracle has provided documentation on changing vulnerable default
configuration settings. For details, consult individual Vulnerability
Notes and the Oracle Security Alerts referenced in Appendix A.
_________________________________________________________________
The CERT Coordination Center thanks David Litchfield and Oracle for
information used in this document.
_________________________________________________________________
Authors: Art Manion, Jason Rafail, and Shawn Van Ittersum
_________________________________________________________________
Appendix A. - Vendor Information
This appendix contains statements provided by vendors for
this advisory. We will update this section as vendors
provide new or modified statements, and we will note the
changes in our revision history. If a particular vendor is
not listed below, we have not received their comments.
Appendix B. - References
1. http://www.kb.cert.org/vuls/id/500203
2. http://www.kb.cert.org/vuls/id/313280
3. http://www.kb.cert.org/vuls/id/750299
4. http://www.kb.cert.org/vuls/id/878603
5. http://www.kb.cert.org/vuls/id/659043
6. http://www.kb.cert.org/vuls/id/923395
7. http://www.kb.cert.org/vuls/id/307835
8. http://www.kb.cert.org/vuls/id/736923
9. http://www.kb.cert.org/vuls/id/611776
10. http://www.kb.cert.org/vuls/id/698467
11. http://www.kb.cert.org/vuls/id/476619
12. http://www.kb.cert.org/vuls/id/712723
13. http://www.kb.cert.org/vuls/id/168795
14. http://www.kb.cert.org/vuls/id/278971
15. http://www.kb.cert.org/vuls/id/180147
16. http://www.kb.cert.org/vuls/id/193523
17. http://www.kb.cert.org/vuls/id/977251
18. http://www.kb.cert.org/vuls/id/805915
19. http://www.kb.cert.org/vuls/id/547459
20. http://www.nextgenss.com/papers/hpoas.pdf
21. http://www.nextgenss.com/advisories/plsql.txt
22. http://www.nextgenss.com/advisories/oraplsextproc.txt
23. http://www.nextgenss.com/advisories/oraplsbos.txt
24. http://www.nextgenss.com/advisories/orajsa.txt
25. http://www.nextgenss.com/advisories/orajsp.txt
26. http://otn.oracle.com/deploy/security/pdf/plsextproc_alert.pdf
27. http://otn.oracle.com/deploy/security/pdf/ias_modplsql_alert.pdf
28. http://otn.oracle.com/deploy/security/pdf/modplsql.pdf
29. http://otn.oracle.com/deploy/security/pdf/ias_soap_alert.pdf
______________________________________________________________________
This document is available from:
http://www.cert.org/advisories/CA-2002-08.html
______________________________________________________________________
CERT/CC Contact Information
Email: cert@cert.org
Phone: +1 412-268-7090 (24-hour hotline)
Fax: +1 412-268-6989
Postal address:
CERT Coordination Center
Software Engineering Institute
Carnegie Mellon University
Pittsburgh PA 15213-3890
U.S.A.
CERT/CC personnel answer the hotline 08:00-17:00 EST(GMT-5) /
EDT(GMT-4) Monday through Friday; they are on call for emergencies
during other hours, on U.S. holidays, and on weekends.
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______________________________________________________________________
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Engineering Institute is furnished on an "as is" basis. Carnegie
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Copyright 2002 Carnegie Mellon University.
Revision History
March 14, 2002: Initial release
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