Login
Newsletter
Werbung

Sicherheit: Preisgabe von Informationen in glibc
Aktuelle Meldungen Distributionen
Name: Preisgabe von Informationen in glibc
ID: 200408-16
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Mi, 18. August 2004, 13:00
Referenzen: Keine Angabe
Applikationen: GNU C library

Originalnachricht

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200408-16
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Low
Title: glibc: Information leak with LD_DEBUG
Date: August 16, 2004
Bugs: #59526
ID: 200408-16

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

glibc contains an information leak vulnerability allowing the debugging
of SUID binaries.

Background
==========

The GNU C library defines various Unix-like "system calls" and other
basic facilities needed for a standard POSIX-like application to
operate.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-libs/glibc <= 2.3.2-r10 >= 2.3.2-r11
2 sys-libs/glibc <= 2.3.3.20040420 >= 2.3.3.20040420-r1
3 sys-libs/glibc <= 2.3.3.20040420 >= 2.3.4.20040619-r1
4 sys-libs/glibc <= 2.3.4.20040619 >= 2.3.4.20040619-r1
5 sys-libs/glibc <= 2.3.2-r10 Vulnerable!
6 sys-libs/glibc <= 2.3.4.20040605 Vulnerable!
-------------------------------------------------------------------
# Package 1 only applies to ALPHA, ARM, HPPA, IA64 and SPARC
users.
# Package 2 only applies to x86 and PPC users.
# Package 3 only applies to MIPS users.
# Package 4 only applies to AMD64 users.
# Package 5 only applies to S390 users.
# Package 6 only applies to PPC64 users.
-------------------------------------------------------------------
NOTE: Certain packages are still vulnerable. Users should migrate
to another package if one is available or wait for the
existing packages to be marked stable by their
architecture maintainers.
-------------------------------------------------------------------
6 affected packages; please see the notes above...
-------------------------------------------------------------------

Description
===========

Silvio Cesare discovered a potential information leak in glibc. It
allows LD_DEBUG on SUID binaries where it should not be allowed. This
has various security implications, which may be used to gain
confidentional information.

Impact
======

An attacker can gain the list of symbols a SUID application uses and
their locations and can then use a trojaned library taking precendence
over those symbols to gain information or perform further exploitation.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of glibc.

Resolution
==========

All glibc users should upgrade to the latest version:

# emerge sync

# emerge -pv your_version
# emerge your_version

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200408-16.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/1.0
Pro-Linux
Gewinnspiel
Neue Nachrichten
Werbung