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Mandrake: 'glibc' vulnerabilities Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
Mandrake A number of bugs exist in glibc that could result in a local root comprimise.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

________________________________________________________________________

                Linux-Mandrake Security Update Advisory
________________________________________________________________________

Package name:           glibc
Date:                   September 6th, 2000
Advisory ID:            MDKSA-2000:045

Affected versions:      7.0, 7.1
________________________________________________________________________

Problem Description:

 A bug was discovered in ld.so that could allow local users to obtain
 root privileges.  The dynamic loader, ld.so, is responsible for making
 shared libraries available within a program at run-time.  Normally, a
 user is allowed to load additional shared libraries when executing a
 program; they can be specified with environment variables such as
 LD_PRELOAD.  Because this is not acceptable for applications that are
 setuid root, ld.so normally removes these environment variables for
 setuid root programs.  The discovered bug causes these environment
 variables to not be removed under certain circumstances.  While
 setuid programs themselves are not vulnerable, external programs they
 execute can be affected by this problem.  

 A number of additional bugs have been found in the glibc locale and
 internationaliztion security checks.  In internationalized programs,
 users are permitted to select a locale or choose message catalogues
 using environment variables such as LANG or LC_*.  The content of
 these variables is then used as part of the pathname used to search
 message catalogues or locale files.  Under normal circumstances, if
 these variables contained the "/" character, a program could load the
 internationalization files from arbitrary directories.  This is not
 acceptable for setuid programs, which is the reason glibc does not
 allow certain settings of these variables if the program is setuid
 or setgid.  However, some of these checks were done in inapporpriate
 places, contained bugs, or were missing entirely.  It is highly
 probable that some of these bugs can be used for local root exploits.
________________________________________________________________________

Please verify these md5 checksums of the updates prior to upgrading to
ensure the integrity of the downloaded package.  You can do this by
running the md5sum program on the downloaded package by using
"md5sum package.rpm".

Linux-Mandrake 7.0:
05e57344e0141d4f5085f78155b58b66  7.0/RPMS/glibc-2.1.3-16mdk.i586.rpm
284ee4868af286469169a4a6605d3172  7.0/RPMS/glibc-devel-2.1.3-16mdk.i586.rpm
114c605878c338ed36aabe9b673cd4fd  7.0/RPMS/glibc-profile-2.1.3-16mdk.i586.rpm
1f263ca77795b93b54e0af5644149407  7.0/SRPMS/glibc-2.1.3-16mdk.src.rpm

Linux-Mandrake 7.1:
f34a2988c60b32baeef205c0a0586b8e  7.1/RPMS/glibc-2.1.3-17mdk.i586.rpm
28c96de9e746eb0c7b3bcc0c58728fd9  7.1/RPMS/glibc-devel-2.1.3-17mdk.i586.rpm
27805991e31882d827bb032453fd5f16  7.1/RPMS/glibc-profile-2.1.3-17mdk.i586.rpm
eec3d0d92b216e0a47bc4909b6fbdfaf  7.1/SRPMS/glibc-2.1.3-17mdk.src.rpm
________________________________________________________________________

To upgrade automatically, use « MandrakeUpdate ».  

If you want to upgrade manually, download the updated package from one 
of our FTP server mirrors and uprade with "rpm -Uvh package_name".  

You can download the updates directly from:
   ftp://ftp.linux.tucows.com/pub/distributions/Mandrake/Mandrake/updates
   ftp://ftp.free.fr/pub/Distributions_Linux/Mandrake/updates

Or try one of the other mirrors listed at:

   http://www.linux-mandrake.com/en/ftp.php3.  

Updated packages are available in the "updates/[ver]/RPMS/" directory.  
For example, if you are looking for an updated RPM package for
Linux-Mandrake 7.1, look for it in "updates/7.1/RPMS/".  Updated source
RPMs are available as well, but you generally do not need to download
them.

Please be aware that sometimes it takes the mirrors a few hours to 
update, so if you want an immediate upgrade, please use one of the two 
above-listed mirrors.

You can view other security advisories for Linux-Mandrake at:

   http://www.linux-mandrake.com/en/fupdates.php3

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
________________________________________________________________________

Linux-Mandrake has two security-related mailing list services that 
anyone can subscribe to:

security-announce@linux-mandrake.com

  Linux-Mandrake's security announcements mailing list.  Only 
  announcements are sent to this list and it is read-only.

security-discuss@linux-mandrake.com

  Linux-Mandrake's security discussion mailing list.  This list is open
  to anyone to discuss Linux-Mandrake security specifically and Linux
  security in general.

To subscribe to either list, send a message to
  sympa@linux-mandrake.com
with "subscribe [listname]" in the body of the message.

To remove yourself from either list, send a message to
  sympa@linux-mandrake.com
with "unsubscribe [listname]" in the body of the message.

To get more information on either list, send a message to
  sympa@linux-mandrake.com
with "info [listname]" in the body of the message.

Optionally, you can use the web interface to subscribe to or unsubscribe
from either list:

   http://www.linux-mandrake.com/en/flists.php3#security
________________________________________________________________________

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team 
  <security@linux-mandrake.com>


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