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                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated python packages fix predictable temporary file
Advisory ID:       RHSA-2002:202-33
Issue date:        2002-09-12
Updated on:        2003-02-12
Product:           Red Hat Linux
Keywords:          symlink os.excvpe flaw:link
Cross references:
Obsoletes:
CVE Names:         CAN-2002-1119
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1. Topic:

An insecure use of a temporary file has been found in Python.  This erratum
provides updated Python packages.

[updated Feb 12 2003]
Updated packages for Red Hat Linux 7.3 are available that fix a binary
incompatibility change in the original erratum packages that affected
Red Hat-config-users, and to add back the missing python-tools package.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - i386
Red Hat Linux 7.0 - i386
Red Hat Linux 7.1 - i386
Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386

3. Problem description:

Python is an interpreted, interactive, object-oriented programming
language.

Zack Weinberg discovered that os._execvpe from os.py in Python 2.2.1 and
earlier creates temporary files with predictable names.  This could allow
local users to execute arbitrary code via a symlink attack.

All users should upgrade to these errata packages, which contain a patch to
python 1.5.2 and are not vulnerable to this issue.  Please note that for
Red Hat Linux 7.3 we have updated the python2 packages from version 2.2 to
version 2.2.2.  Red Hat Linux 8.0 shipped a version of Python that already
contained a fix for this issue and is therefore not vulnerable to this issue.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed  (  for more info):

82435 - Python 2.2.2 errata breaks Red Hat-config-users82544 - Errata removes most tools

6. RPMs required:

Red Hat Linux 6.2:

SRPMS: 
 

i386: 
  
  
  
  
 

Red Hat Linux 7.0:

SRPMS: 
 

i386: 
  
  
  
  
 

Red Hat Linux 7.1:

SRPMS: 
 

i386: 
  
  
  
  
 

Red Hat Linux 7.2:

SRPMS: 
  
 

i386: 
  
  
  
  
  
  
 

ia64: 
  
  
  
  
  
  
 

Red Hat Linux 7.3:

SRPMS: 
  
 

i386: 
  
  
  
  
  
  
  
  
 



7. Verification:

MD5 sum                          Package Name
--------------------------------------------------------------------------
7536ecc0dc812da6fc4a74d73530e277 6.2/en/os/SRPMS/python-1.5.2-43.62.src.rpm
a54cd70aa64a444f2275c24e285b8ced 6.2/en/os/i386/python-1.5.2-43.62.i386.rpm
00622494a09f0331f49e7c3cb694afb4 6.2/en/os/i386/python-devel-1.5.2-43.62.i386.rpm
127be22d962f8e08e80410b1bbe2a1e9 6.2/en/os/i386/python-docs-1.5.2-43.62.i386.rpm
619eea467c30eabb6d722baf3fb4ba7f 6.2/en/os/i386/python-tools-1.5.2-43.62.i386.rpm
ab9a26d13ff723261c193ef5b9f1b633 6.2/en/os/i386/tkinter-1.5.2-43.62.i386.rpm
90d8f04c125dcb72c4d194b6b794d3a9 7.0/en/os/SRPMS/python-1.5.2-43.71.src.rpm
b3f5c7a9c74a4f6f155ffb756169b443 7.0/en/os/i386/python-1.5.2-43.71.i386.rpm
eb431838b7164e726dc85ad73b533503 7.0/en/os/i386/python-devel-1.5.2-43.71.i386.rpm
677149c18f09a08340a3506d4ac8fa81 7.0/en/os/i386/python-docs-1.5.2-43.71.i386.rpm
e358a13ed18b96c9bb99a4f3989b3023 7.0/en/os/i386/python-tools-1.5.2-43.71.i386.rpm
ccc967b2e1e52d3f876eb1fc85e9b44a 7.0/en/os/i386/tkinter-1.5.2-43.71.i386.rpm
90d8f04c125dcb72c4d194b6b794d3a9 7.1/en/os/SRPMS/python-1.5.2-43.71.src.rpm
b3f5c7a9c74a4f6f155ffb756169b443 7.1/en/os/i386/python-1.5.2-43.71.i386.rpm
eb431838b7164e726dc85ad73b533503 7.1/en/os/i386/python-devel-1.5.2-43.71.i386.rpm
677149c18f09a08340a3506d4ac8fa81 7.1/en/os/i386/python-docs-1.5.2-43.71.i386.rpm
e358a13ed18b96c9bb99a4f3989b3023 7.1/en/os/i386/python-tools-1.5.2-43.71.i386.rpm
ccc967b2e1e52d3f876eb1fc85e9b44a 7.1/en/os/i386/tkinter-1.5.2-43.71.i386.rpm
9730651382eb7f9e62ffe6de0672c7e6 7.2/en/os/SRPMS/python-1.5.2-43.72.src.rpm
f668bcd67d3a2b5c43775c0e7de4bcbb 7.2/en/os/SRPMS/python2-2.1.1-3.72.src.rpm
0954d6dc326c6efe2437e79403a3f63d 7.2/en/os/i386/python-1.5.2-43.72.i386.rpm
719a70ae917e3ae6f4fee58035a6d7b6 7.2/en/os/i386/python-devel-1.5.2-43.72.i386.rpm
fc5b52750f51d9af93b65d7ed627722d 7.2/en/os/i386/python-docs-1.5.2-43.72.i386.rpm
eae08607c830fd1f2c26d8c274f61e85 7.2/en/os/i386/python-tools-1.5.2-43.72.i386.rpm
b003e4d54488dc6de8cbda4b67fd00ff 7.2/en/os/i386/python2-2.1.1-3.72.i386.rpm
dc1a8dfc6730260a928686d045f71a78 7.2/en/os/i386/python2-devel-2.1.1-3.72.i386.rpm
a7caa31d00458fc9d4d15eb8d104a4ed 7.2/en/os/i386/tkinter-1.5.2-43.72.i386.rpm
d9f4fd6143727e449d84b53d2ea4ef9b 7.2/en/os/ia64/python-1.5.2-43.72.ia64.rpm
b29d85ad562bec405b38489f30806374 7.2/en/os/ia64/python-devel-1.5.2-43.72.ia64.rpm
e779912db153931041cf3966602d5cf7 7.2/en/os/ia64/python-docs-1.5.2-43.72.ia64.rpm
1047fdaa02bd21d630bfa13b82c99e2d 7.2/en/os/ia64/python-tools-1.5.2-43.72.ia64.rpm
99c4f0a6882e6d74e3e47505dbee4d61 7.2/en/os/ia64/python2-2.1.1-3.72.ia64.rpm
621198359d022edce55506114080bda7 7.2/en/os/ia64/python2-devel-2.1.1-3.72.ia64.rpm
74bf134d537ccab7059edee801df360c 7.2/en/os/ia64/tkinter-1.5.2-43.72.ia64.rpm
0b5a4cdda781eeff82b8908a875560b2 7.3/en/os/SRPMS/python-1.5.2-43.73.src.rpm
a880215bae8b3590c0008f8cc17dd048 7.3/en/os/SRPMS/python2-2.2.2-11.7.3.src.rpm
dcbc769c9e642dfa04dd484620530a62 7.3/en/os/i386/python-1.5.2-43.73.i386.rpm
835fcb1cb25e5a14b7963b001bccc28c 7.3/en/os/i386/python-devel-1.5.2-43.73.i386.rpm
6319e4c3d2551a960351645f60e741f0 7.3/en/os/i386/python-docs-1.5.2-43.73.i386.rpm
f56d052e910fb2c4e04ee2de60353d0a 7.3/en/os/i386/python-tools-1.5.2-43.73.i386.rpm
40991aa17090bddac82e3fc5ab60eda2 7.3/en/os/i386/python2-2.2.2-11.7.3.i386.rpm
1dba356b43bf9806d2f17eab601c923a 7.3/en/os/i386/python2-devel-2.2.2-11.7.3.i386.rpm
0d0b52a0ff3d7557106919b9a5419841 7.3/en/os/i386/python2-docs-2.2.2-11.7.3.i386.rpm
9acbaea9e85ea31ff24b925a6d1edfdd 7.3/en/os/i386/tkinter-1.5.2-43.73.i386.rpm
25ead4c99f5c7a03ee69ed056250c6b6 7.3/en/os/i386/tkinter2-2.2.2-11.7.3.i386.rpm


These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at  About

You can verify each package with the following command:

    rpm --checksig -v 

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:

    md5sum 


8. References:
 
#156556 - python: os.execvpe vulnerability - Debian Bug report logs 
CVE -CVE-2002-1119

9. Contact:

The Red Hat security contact is <security@RedHat.com>.  More contact
details at  All Red Hat products

Copyright 2003 Red Hat, Inc.