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AUSCERT External Security Bulletin Redistribution
ESB-2008.0102 -- [UNIX/Linux]
libc - inet_network() off-by-one buffer overflow
30 January 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: libc
Publisher: US-CERT
Operating System: UNIX variants (UNIX, Linux)
Impact: Denial of Service
Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2008-0122
Ref: ESB-2008.0053
Original Bulletin: http://www.kb.cert.org/vuls/id/203611
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Vulnerability Note VU#203611
inet_network() off-by-one buffer overflow
Overview
The inet_network() resolver function contains an off-by-one buffer overflow,
which may allow a remote, unauthenticated attacker to execute arbitrary code
on a vulnerable system.
I. Description
The inet_network() function takes a character string representation for an
internet address and returns the internet network number in integer form.
inet_network() is implemented by various libbind, libc, and GNU libc versions.
Applications that link against a vulnerable version of inet_network() may be
vulnerable to a one-byte overflow.
II. Impact
A remote, unauthenticated attacker may be able to execute arbitrary code or
cause a denial of service on a vulnerable system.
III. Solution
Apply an update
FreeBSD libc - Apply the patch in FreeBSD Security Advisory
FreeBSD-SA-08:02.libc
GNU libc - This issue was resolved on February 11, 2000 in the main
(diff) and glibc 2.1 (diff) branches
libbind - This issue will be resolved in libbind 9.3.5, 9.4.3, 2.5.0b2,
or later. A patch is also available in the ISC Advisory
Systems Affected
Vendor Status Date Updated
Apple Computer, Inc. Not Vulnerable 25-Jan-2008
BlueCat Networks, Inc. Unknown 17-Jan-2008
CentOS Unknown 17-Jan-2008
Check Point Software
Technologies Unknown 17-Jan-2008
Conectiva Inc. Unknown 17-Jan-2008
Cray Inc. Unknown 17-Jan-2008
Debian GNU/Linux Unknown 21-Jan-2008
EMC Corporation Unknown 17-Jan-2008
Engarde Secure Linux Unknown 17-Jan-2008
F5 Networks, Inc. Unknown 17-Jan-2008
Fedora Project Unknown 17-Jan-2008
FreeBSD, Inc. Vulnerable 25-Jan-2008
Fujitsu Unknown 17-Jan-2008
Gentoo Linux Unknown 17-Jan-2008
Gnu ADNS Unknown 17-Jan-2008
GNU glibc Vulnerable 25-Jan-2008
Hewlett-Packard Company Unknown 17-Jan-2008
Hitachi Unknown 17-Jan-2008
IBM Corporation Unknown 17-Jan-2008
IBM Corporation (zseries) Unknown 17-Jan-2008
IBM eServer Unknown 17-Jan-2008
Infoblox Unknown 17-Jan-2008
Ingrian Networks, Inc. Not Vulnerable 29-Jan-2008
Internet Software
Consortium Unknown 10-Dec-2007
Juniper Networks, Inc. Unknown 17-Jan-2008
Lucent Technologies Unknown 17-Jan-2008
Mandriva, Inc. Not Vulnerable 21-Jan-2008
Men & Mice Unknown 17-Jan-2008
Metasolv Software, Inc. Unknown 17-Jan-2008
Microsoft Corporation Not Vulnerable 18-Jan-2008
MontaVista Software, Inc. Unknown 17-Jan-2008
NEC Corporation Unknown 17-Jan-2008
NetBSD Unknown 17-Jan-2008
Nortel Networks, Inc. Unknown 17-Jan-2008
Novell, Inc. Unknown 17-Jan-2008
OpenBSD Vulnerable 21-Jan-2008
Openwall GNU/*/Linux Unknown 17-Jan-2008
QNX, Software Systems,
Inc. Unknown 17-Jan-2008
Red Hat, Inc. Unknown 17-Jan-2008
Shadowsupport Unknown 17-Jan-2008
Silicon Graphics, Inc. Unknown 17-Jan-2008
Slackware Linux Inc. Unknown 17-Jan-2008
Sony Corporation Unknown 17-Jan-2008
Sun Microsystems, Inc. Unknown 17-Jan-2008
SUSE Linux Unknown 17-Jan-2008
The SCO Group Unknown 17-Jan-2008
Trustix Secure Linux Unknown 17-Jan-2008
Turbolinux Unknown 17-Jan-2008
Ubuntu Unknown 17-Jan-2008
Unisys Unknown 17-Jan-2008
Wind River Systems, Inc. Unknown 17-Jan-2008
References
http://security.freebsd.org/advisories/FreeBSD-SA-08:02.libc.asc
http://sourceware.org/cgi-bin/cvsweb.cgi/libc/inet/inet_net.c.diff?r1=1.6.2.1&r2=1.6.2.2&cvsroot=glibc&f=h
http://sourceware.org/cgi-bin/cvsweb.cgi/libc/inet/inet_net.c.diff?r1=1.8&r2=1.9&cvsroot=glibc&f=h
http://www.securityfocus.com/bid/27283
http://securitytracker.com/alerts/2008/Jan/1019189.html
http://secunia.com/advisories/28367
http://xforce.iss.net/xforce/xfdb/39670
Credit
Thanks to Mark Andrews of ISC for reporting this vulnerability.
This document was written by Will Dormann.
Other Information
Date Public 12/10/2007
Date First Published 01/25/2008 01:35:01 PM
Date Last Updated 01/29/2008
CERT Advisory
CVE Name CVE-2008-0122
US-CERT Technical Alerts
Metric 0.76
Document Revision 10
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