Linux-Mandrake Security Update Advisory: glibc update

Date: Thu, 18 Jan 2001 14:58:19 -0700
From: Linux Mandrake Security Team
To: Linux Mandrake Security Announcements
Subject: [Security Announce] MDKSA-2001:012 – glibc update

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                Linux-Mandrake Security Update Advisory

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Package name:           glibc
Date:                   January 18th, 2001
Advisory ID:            MDKSA-2001:012

Affected versions:      6.0, 6.1, 7.0, 7.1, 7.2, Corporate Server 1.0.1

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Problem Description:

The LD_PRELOAD variable in the GNU C Library is honoured
normally even for SUID/SGID applications (but removed afterwards
from the environment) if it does not contain ‘/’ characters. There
is a special check which only preloads found libraries if they have
the SUID bit set. However, if a library has been found in
/etc/ld.so.cache, this check was not performed. As a result, a
malicious user could preload some library located in /lib or
/usr/lib before SUID/SGID applications and create or overwrite a
file he would not normally have permission to. As well, LD_PROFILE
output from SUID programs would go into /var/tmp, making it
vulnerable to various link attacks.

---

Please verify the update prior to upgrading to ensure the
integrity of the downloaded package. You can do this with the
command:
rpm –checksig package.rpm
You can get the GPG public key of the Linux-Mandrake Security Team
at
http://www.linux-mandrake.com/en/security/RPM-GPG-KEYS

If you use MandrakeUpdate, the verification of md5 checksum and GPG
signature is performed automatically for you.

Linux-Mandrake 6.0:
40c5a62fe717337c78b89162e706b204
6.0/RPMS/glibc-2.1.3-18.2mdk.i586.rpm
853008b0e720f9ae4cee919edb9b299f
6.0/RPMS/glibc-devel-2.1.3-18.2mdk.i586.rpm
395f5b6ce2ac5a9d712112d5c025d037
6.0/RPMS/glibc-profile-2.1.3-18.2mdk.i586.rpm
96d42b788a258f9d89974abb16646489
6.0/SRPMS/glibc-2.1.3-18.2mdk.src.rpm

Linux-Mandrake 6.1:
40c5a62fe717337c78b89162e706b204
6.1/RPMS/glibc-2.1.3-18.2mdk.i586.rpm
853008b0e720f9ae4cee919edb9b299f
6.1/RPMS/glibc-devel-2.1.3-18.2mdk.i586.rpm
395f5b6ce2ac5a9d712112d5c025d037
6.1/RPMS/glibc-profile-2.1.3-18.2mdk.i586.rpm
96d42b788a258f9d89974abb16646489
6.1/SRPMS/glibc-2.1.3-18.2mdk.src.rpm

Linux-Mandrake 7.0:
40c5a62fe717337c78b89162e706b204
7.0/RPMS/glibc-2.1.3-18.2mdk.i586.rpm
853008b0e720f9ae4cee919edb9b299f
7.0/RPMS/glibc-devel-2.1.3-18.2mdk.i586.rpm
395f5b6ce2ac5a9d712112d5c025d037
7.0/RPMS/glibc-profile-2.1.3-18.2mdk.i586.rpm
96d42b788a258f9d89974abb16646489
7.0/SRPMS/glibc-2.1.3-18.2mdk.src.rpm

Linux-Mandrake 7.1:
05f0ef4d07e638706262ff606518aedd
7.1/RPMS/glibc-2.1.3-18.1mdk.i586.rpm
8681ffba3948fdc1e3fa2ecbf1eab54d
7.1/RPMS/glibc-devel-2.1.3-18.1mdk.i586.rpm
3f5316876c80c318cb39c68294412239
7.1/RPMS/glibc-profile-2.1.3-18.1mdk.i586.rpm
f68106cdfb899877f9984c1b9aabed70
7.1/SRPMS/glibc-2.1.3-18.1mdk.src.rpm

Linux-Mandrake 7.2:
4720a8d7f0c973a3eec8a7539766b590
7.2/RPMS/glibc-2.1.3-18.3mdk.i586.rpm
fcdbafc369120fb5a81566fd3cdabe03
7.2/RPMS/glibc-devel-2.1.3-18.3mdk.i586.rpm
df76db4b226004082bbc0eb4d1034e87
7.2/RPMS/glibc-profile-2.1.3-18.3mdk.i586.rpm
09c064f52f8b1e0ac28fa30fa171dd7c
7.2/SRPMS/glibc-2.1.3-18.3mdk.src.rpm

Corporate Server 1.0.1:
05f0ef4d07e638706262ff606518aedd
1.0.1/RPMS/glibc-2.1.3-18.1mdk.i586.rpm
8681ffba3948fdc1e3fa2ecbf1eab54d
1.0.1/RPMS/glibc-devel-2.1.3-18.1mdk.i586.rpm
3f5316876c80c318cb39c68294412239
1.0.1/RPMS/glibc-profile-2.1.3-18.1mdk.i586.rpm
f68106cdfb899877f9984c1b9aabed70
1.0.1/SRPMS/glibc-2.1.3-18.1mdk.src.rpm

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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/security/

If you want to report vulnerabilities, please contact

security@linux-mandrake.com

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security-announce@linux-mandrake.com

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