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CA-2002-08 Multiple vulnerabilities in Oracle Servers

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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
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Fax: +1 412-268-6989
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Copyright 2002 Carnegie Mellon University.

Revision History
March 14, 2002: Initial release

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