Date: Fri, 16 Feb 2001 13:22:25 -0800
From: [email protected]
To: [email protected]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.
___________________________________________________________________________
A security hole was discovered in the package mentioned above.
Please update the package in your installation as soon as possible.
___________________________________________________________________________
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.rpmftp://ftp.turbolinux.com/pub/updates/6.0/security/glibc-devel-2.1.3-27.i386.rpmftp://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
---------------------------------------------------------------------------
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
___________________________________________________________________________
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.
___________________________________________________________________________
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:
[email protected]
___________________________________________________________________________
Subscribe to the TurboLinux Security Mailing lists:
TL-security - A moderated list for discussing security issues
TurboLinux products.
Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security
TL-security-announce - An announce-only mailing list for security updates
and alerts.
Subscribe at:
http://www.turbolinux.com/mailman/listinfo/tl-security-announce
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