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Linux-Mandrake Security Update Advisory: glibc update

Aug 30, 2000, 19:47 (0 Talkback[s])

Date: Tue, 29 Aug 2000 10:49:15 -0600
From: Linux Mandrake Security Team security@LINUX-MANDRAKE.COM
Subject: MDKSA-2000:040 - glibc update

                Linux-Mandrake Security Update Advisory

Package name:           glibc
Date:                   August 29th, 2000
Advisory ID:            MDKSA-2000:040

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. These updated packages contain a patch from Caldera Systems, Inc. that fixes this vulernability. It should be noted that as of yet there are no known exploits for this problem, but all users should update to these glibc packages.

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:

Linux-Mandrake 7.1: fef82ed4fb26da29b6d251a7cb66f314 7.1/RPMS/glibc-2.1.3-15mdk.i586.rpm 0cb35452948985dbfbc74b3a634aa91c 7.1/RPMS/glibc-devel-2.1.3-15mdk.i586.rpm 9da59ea51bd6f9bf58f863ec29fefad4 7.1/RPMS/glibc-profile-2.1.3-15mdk.i586.rpm 8defa08c5be2a3b05e58f3d05f883ec2 7.1/SRPMS/glibc-2.1.3-15mdk.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:

Or try one of the other mirrors listed at:


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:


If you want to report vulnerabilities, please contact


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


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


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

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