TurboLinux Security Announcement: All versions prior to glibc-2.1.3-27

Date: Fri, 16 Feb 2001 13:22:25 -0800
From: security@turbolinux.com
To: tl-security-announce@www1.turbolinux.com
Subject: [TL-Security-Announce] glibc-2.1.3-27 TLSA2000021-2

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                        TurboLinux Security Announcement

        Vulnerable Packages: All versions prior to glibc-2.1.3-27
        Date: 02/14/2001 5:00 PDT

        Affected TurboLinux versions:TL 6.1 WorkStation,
                                     All TurboLinux versions
                                     6.0.5 and earlier

        TurboLinux Advisory ID#:  TLSA2000021-2

   Credits: This vulnerability was announced by RedHat in an advisory
            posted on BugTraq on January 16, 2001.

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A security hole was discovered in the package mentioned above.
Please update the package in your installation as soon as
possible.

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1. Problem Summary(From the BugTraq advisory at
securityfocus.com, id#2223)

A problem with the library could allow access to write or
overwrite restricted files.

2. Impact(Also from the BugTraq advisory on
securityfocus.com)

Upon execution of SUID and SGID applications, the library allows
a user to preload libraries in the environment variable LD_PRELOAD
providing the variable does not contain forward slashes. A special
check is also performed to ensure the library being preloaded is
SUID. However, if the library is found in the /etc/ld.so.cache
file, this check is circumvented, and never performed. It is
therefore possible to load a library from /lib or /usr/lib prior to
the execution of a SUID or SGID program. This flaw makes it
possible for a user with malicious motives to create files in re-
stricted locations, or overwrite files outside of the access of
this user, including system files.

3. Solution

Update the package from our ftp server by running the following
command for each package:

rpm -Uvh –nodeps –force ftp_path_to_filename

Where ftp_path_to_filename is the following:

ftp://ftp.turbolinux.com/pub/updates/6.0/security/glibc-2.1.3-27.i386.rpm

ftp://ftp.turbolinux.com/pub/updates/6.0/security/glibc-devel-2.1.3-27.i386.rpm

ftp://ftp.turbolinux.com/pub/updates/6.0/security/glibc-profile-2.1.3-27.i386.rpm

The source RPM can be downloaded here:

ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/glibc-2.1.3-27.src.rpm

**Note: You must rebuild and install the RPM if you choose to
download and install the SRPM. Simply installing the SRPM alone
WILL NOT CLOSE THE SECURITY HOLE.

Please verify the MD5 checksums of the updates before you
install:

  MD5 sum                               Package Name

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13afe999cdcc5133aca98fc0a59c4340 glibc-2.1.3-27.i386.rpm
4a55428c154311387844fbf84600e789 glibc-devel-2.1.3-27.i386.rpm
6b48d26d9dc0ce224e4ea9c7a56fcc92 glibc-profile-2.1.3-27.i386.rpm
e0cd7ac0cca7a8e870247235e4f2e4cd glibc-2.1.3-27.src.rpm

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These packages are GPG signed by Turbolinux for security. Our
key is available here:

http://www.turbolinux.com/security/tlgpgkey.asc

To verify a package, use the following command:

rpm –checksig name_of_rpm

To examine only the md5sum, use the following command:

rpm –checksig –nogpg name_of_rpm

**Note: Checking GPG keys requires RPM 3.0 or higher.

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You can find more updates on our ftp server:

ftp://ftp.turbolinux.com/pub/updates/6.0/security/
for TL6.0 Workstation and Server security updates
ftp://ftp.turbolinux.com/pub/updates/4.0/security/
for TL4.0 Workstation and Server security updates

Our webpage for security announcements:

http://www.turbolinux.com/security

If you want to report vulnerabilities, please contact:

security@turbolinux.com

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