Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2000.265 -- RHSA-2000:062-03
glint symlink vulnerability
27 September 2000
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: glint
Vendor: Red Hat
Operating System: Red Hat Linux
Linux
Impact: Overwrite Arbitrary Files
Access Required: Local
- --------------------------BEGIN INCLUDED TEXT--------------------
- ---------------------------------------------------------------------
Red Hat, Inc. Security Advisory
Synopsis: glint symlink vulnerability
Advisory ID: RHSA-2000:062-03
Issue date: 2000-09-19
Updated on: 2000-09-19
Product: Red Hat Linux
Keywords: glint symlink rpm
Cross references: N/A
- ---------------------------------------------------------------------
1. Topic:
glint blindly follows a symlink in /tmp, overwriting the target file, so it
can conceivably be used to destroy any file on the system.
2. Relevant releases/architectures:
Red Hat Linux 5.2 - i386, alpha, sparc
3. Problem description:
If a specific symlink exists in /tmp, glint will open it and write to
it when run by root -- so destruction of any file is possible.
Note that glint does not work with RPM 3.0 or higher. If you have RPM 3.0
or higher installed, just uninstall the glint package to remove this
vulnerability.
4. Solution:
For each RPM for your particular architecture, run:
rpm -Fvh [filename]
where filename is the name of the RPM.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
17544 - HUGE race condition in Glint
6. RPMs required:
Red Hat Linux 5.2:
sparc:
ftp://updates.redhat.com/5.2/sparc/glint-2.6.3-1.sparc.rpm
alpha:
ftp://updates.redhat.com/5.2/alpha/glint-2.6.3-1.alpha.rpm
i386:
ftp://updates.redhat.com/5.2/i386/glint-2.6.3-1.i386.rpm
sources:
ftp://updates.redhat.com/5.2/SRPMS/glint-2.6.3-1.src.rpm
7. Verification:
MD5 sum Package Name
- --------------------------------------------------------------------------
b31d4a967bba65a2acc17c16ca75582c 5.2/SRPMS/glint-2.6.3-1.src.rpm
c9e1679ed0f8c1d15878eb8943be4b75 5.2/alpha/glint-2.6.3-1.alpha.rpm
a74b4697402e5ce8f34959ebe2d5327d 5.2/i386/glint-2.6.3-1.i386.rpm
20d74bc2360f6622dc2062654dde84f9 5.2/sparc/glint-2.6.3-1.sparc.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm --checksig <filename>
If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
rpm --checksig --nogpg <filename>
8. References:
Thanks to Stan Bubrouski <nullness@crosswinds.net> for finding and
reporting this bug.
Copyright(c) 2000 Red Hat, Inc.
- --------------------------END INCLUDED TEXT--------------------
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBOlSM4Ch9+71yA2DNAQFMqgP9GBDQkCHRac16jvK7xCYGkSYhfkvOZtiz
ifDISx3UXEOPquLSYo1036wLjv6YvF0WebVXCoKFPkScTr4rqspCCZWIhs4IIHO0
LGzEKPZ0OtVf1eqwMMLsscwhXI5rlSg7R0BHPsSsWv36MONspB1dJgfZR7yHw52M
A0nxqaZx+k8=
=+4GA
-----END PGP SIGNATURE-----