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Category:   Application (Generic)  >   Perl Vendors:   Wall, Larry
(Red Hat Issues Fix) Perl DBI::ProxyServer Unsafe Temporary Files May Let Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1013063
SecurityTracker URL:  http://securitytracker.com/id/1013063
CVE Reference:   CAN-2005-0077   (Links to External Site)
Date:  Feb 2 2005
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Perl DBI library in the use of temporary files. A local user may be able to gain elevated privileges.

The 'DBI::ProxyServer' module in the Perl DBI library uses a process ID (PID) file in an unsafe manner. A local user can create a symbolic link (symlink) from a critical file on the system to the PID file used by the library. Then, when a target user invokes an application that uses the module (such as 'dbiproxy'), the symlinked file may be created or overwritten with the privileges of the target user.

The flaws reside in 'dbiproxy.PL' and 'lib/DBI/ProxyServer.pm'.

Javier Fernandez-Sanguino Pena from the Debian Security Audit Project is credited with discovering this flaw.
Impact:   A local user may be able to gain elevated privileges.
Solution:   Red Hat has released a fix.

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e perl-DBI-1.18-3.src.rpm

i386:
22af0266ecb99d0997a2d9f245e3a048 perl-DBI-1.18-3.i386.rpm

ia64:
c77842c2d3164aaaccbdbc835b28834b perl-DBI-1.18-3.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e perl-DBI-1.18-3.src.rpm

ia64:
c77842c2d3164aaaccbdbc835b28834b perl-DBI-1.18-3.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e perl-DBI-1.18-3.src.rpm

i386:
22af0266ecb99d0997a2d9f245e3a048 perl-DBI-1.18-3.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e perl-DBI-1.18-3.src.rpm

i386:
22af0266ecb99d0997a2d9f245e3a048 perl-DBI-1.18-3.i386.rpm

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7 perl-DBI-1.32-9.i386.rpm

ia64:
9f9dbb9313e84f86908b00aeb737c424 perl-DBI-1.32-9.ia64.rpm

ppc:
ff90be122c3636ba3b2b253428092633 perl-DBI-1.32-9.ppc.rpm

s390:
fc8faf4640441c1b5cd77972a23ac4ec perl-DBI-1.32-9.s390.rpm

s390x:
371823a6fb25f64dd773073c814d513b perl-DBI-1.32-9.s390x.rpm

x86_64:
86936f627f02c8f96da5467c536997e6 perl-DBI-1.32-9.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7 perl-DBI-1.32-9.i386.rpm

x86_64:
86936f627f02c8f96da5467c536997e6 perl-DBI-1.32-9.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7 perl-DBI-1.32-9.i386.rpm

ia64:
9f9dbb9313e84f86908b00aeb737c424 perl-DBI-1.32-9.ia64.rpm

x86_64:
86936f627f02c8f96da5467c536997e6 perl-DBI-1.32-9.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7 perl-DBI-1.32-9.i386.rpm

ia64:
9f9dbb9313e84f86908b00aeb737c424 perl-DBI-1.32-9.ia64.rpm

x86_64:
86936f627f02c8f96da5467c536997e6 perl-DBI-1.32-9.x86_64.rpm
Cause:   Access control error, State error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Jan 26 2005 Perl DBI::ProxyServer Unsafe Temporary Files May Let Local Users Gain Elevated Privileges


 Source Message Contents
Date:  Tue, 1 Feb 2005 09:50 -0500
Subject:  [RHSA-2005:069-01] Updated perl-DBI package fixes security issue


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated perl-DBI package fixes security issue
Advisory ID:       RHSA-2005:069-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-069.html
Issue date:        2005-02-01
Updated on:        2005-02-01
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2005-0077
- ---------------------------------------------------------------------

1. Summary:

An updated perl-DBI package that fixes a temporary file flaw in
DBI::ProxyServer is now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem description:

DBI is a database access Application Programming Interface (API) for
the Perl programming language. 

The Debian Security Audit Project discovered that the DBI library creates a
temporary PID file in an insecure manner.  A local user could overwrite or
create files as a different user who happens to run an application which
uses DBI::ProxyServer.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2005-0077 to this issue. 

Users should update to this erratum package which disables the temporary
PID file unless configured.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  Use Red Hat
Network to download and update your packages.  To launch the Red Hat
Update Agent, use the following command:

    up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

    http://www.redhat.com/docs/manuals/enterprise/

5. Bug IDs fixed (http://bugzilla.redhat.com/):

145577 - CAN-2005-0077 perl-DBI insecure temporary file usage

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e  perl-DBI-1.18-3.src.rpm

i386:
22af0266ecb99d0997a2d9f245e3a048  perl-DBI-1.18-3.i386.rpm

ia64:
c77842c2d3164aaaccbdbc835b28834b  perl-DBI-1.18-3.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e  perl-DBI-1.18-3.src.rpm

ia64:
c77842c2d3164aaaccbdbc835b28834b  perl-DBI-1.18-3.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e  perl-DBI-1.18-3.src.rpm

i386:
22af0266ecb99d0997a2d9f245e3a048  perl-DBI-1.18-3.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/perl-DBI-1.18-3.src.rpm
b614c046679c98e6cee4b3ef143aff6e  perl-DBI-1.18-3.src.rpm

i386:
22af0266ecb99d0997a2d9f245e3a048  perl-DBI-1.18-3.i386.rpm

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a  perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7  perl-DBI-1.32-9.i386.rpm

ia64:
9f9dbb9313e84f86908b00aeb737c424  perl-DBI-1.32-9.ia64.rpm

ppc:
ff90be122c3636ba3b2b253428092633  perl-DBI-1.32-9.ppc.rpm

s390:
fc8faf4640441c1b5cd77972a23ac4ec  perl-DBI-1.32-9.s390.rpm

s390x:
371823a6fb25f64dd773073c814d513b  perl-DBI-1.32-9.s390x.rpm

x86_64:
86936f627f02c8f96da5467c536997e6  perl-DBI-1.32-9.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a  perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7  perl-DBI-1.32-9.i386.rpm

x86_64:
86936f627f02c8f96da5467c536997e6  perl-DBI-1.32-9.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a  perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7  perl-DBI-1.32-9.i386.rpm

ia64:
9f9dbb9313e84f86908b00aeb737c424  perl-DBI-1.32-9.ia64.rpm

x86_64:
86936f627f02c8f96da5467c536997e6  perl-DBI-1.32-9.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/perl-DBI-1.32-9.src.rpm
eabf3cd83dd61c9b09d2bb6e2160755a  perl-DBI-1.32-9.src.rpm

i386:
6aea6d47ab2a26300af6ed577405e6b7  perl-DBI-1.32-9.i386.rpm

ia64:
9f9dbb9313e84f86908b00aeb737c424  perl-DBI-1.32-9.ia64.rpm

x86_64:
86936f627f02c8f96da5467c536997e6  perl-DBI-1.32-9.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0077

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2005 Red Hat, Inc.

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