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[ For Public Release ]
__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
SunOS, Solaris ifconfig ioctls Vulnerability
August 25, 1997 23:00 GMT Number H-99
______________________________________________________________________________
PROBLEM: A vulnerability exists in the ifconfig command which assigns
addresses to network interfaces and configures network
interface parameters.
PLATFORM: Solaris 2.5.1, 2.5, 2.4, and 2.3 (SunOS versions 5.5.1,
5.5.1_x86, 5.5, 5.5_x86, 5.4, 5.4_x86, and 5.3.)
DAMAGE: This vulnerability, if exploited, allows non-root attackers to
use ifconfig to configure network interface parameters for any
network interface on a system.
SOLUTION: Apply patches as listed in Section 4.
______________________________________________________________________________
VULNERABILITY Sun strongly recommends that you install the patches listed in
ASSESSMENT: section 4 immediately on systems running SunOS 5.5.1, 5.5, 5.4,
and 5.3.
______________________________________________________________________________
[ Start Sun Microsystems Advisory ]
______________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00152
Date: August 25, 1997
Cross-Ref:
Title: Vulnerability in ifconfig ioctls
______________________________________________________________________________
Permission is granted for the redistribution of this Bulletin, so long as
the Bulletin is not edited and is attributed to Sun Microsystems. Portions
may also be excerpted for re-use in other security advisories so long as
proper attribution is included.
Any other use of this information without the express written consent of
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all
liability for any misuse of this information by any third party.
______________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, and 2.3
(SunOS 5.5.1, 5.5, 5.4, and 5.3) which relate to a vulnerability in
ifconfig ioctls.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.5.1, 5.5, 5.4, and 5.3.
2. Who is Affected
Vulnerable: SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
5.4, 5.4_x86, 5.3
Not vulnerable: All other supported versions of SunOS.
The vulnerability is fixed in Solaris 2.6.
3. Understanding the Vulnerability
The command ifconfig assigns addresses to network interfaces and
configures network interface parameters. The use of ifconfig to configure
network interface parameters is restricted to superusers. This
vulnerability, if exploited, allows non-root attackers to use ifconfig
to configure network interface parameters for any network interface on
a system.
4. List of Patches
The vulnerability in ifconfig ioctls is fixed by the following patches:
OS version Patch ID
__________ ________
SunOS 5.5.1 103640-09
SunOS 5.5.1_x86 103641-09
SunOS 5.5 103093-14
SunOS 5.5_x86 103094-11
SunOS 5.4 101945-50
SunOS 5.4_x86 101946-44
SunOS 5.3 101318-87
5. Checksum Table
The checksum table below shows the BSD checksums (SunOS 5.x:
/usr/ucb/sum),
SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures
for the above-mentioned patches that are available from:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
These checksums may not apply if you obtain patches from your answer
centers.
File Name BSD SVR4 MD5
_______________ _________ __________ ________________________________
103640-09.tar.Z 08357 3832 24559 7663 C79A3D0E0CC610638C60BF25DB625559
103641-09.tar.Z 10615 825 9869 1649 B64D85F18E8B74E0DE251BCAA0AD10DE
103093-14.tar.Z 51571 2293 26450 4586 4EA9F527F219C836740DF51C7374F5E4
103094-11.tar.Z 03030 802 64820 1604 75AB9D22CDB03861B5CA9941752A1F57
101945-50.tar.Z 04413 10909 4073 21817 198EAAAC3D92898622351C43F87E884F
101946-44.tar.Z 10072 5540 36413 11080 92D61AD71C77F56CA1DF6038D644B4F9
101318-87.tar.Z 45783 11292 55998 22584 395AD525FD411904A3BD03E7E02EED10
______________________________________________________________________________
_
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
Customers with Sun support contracts can also obtain patches from local
Sun answer centers and SunSITEs worldwide.
B. Sun security bulletins are available via World Wide Web at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins>
C. Sun Security Coordination Team's PGP key is available via World Wide Web
at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins/SunSCkey.txt>
D. To report or inquire about a security problem with Sun software, contact
one or more of the following:
- Your local Sun answer centers
- Your representative computer security response team, such as CERT
- Sun Security Coordination Team. Send email to:
security-alert@sun.com
E. To receive information or subscribe to our CWS (Customer Warning System)
mailing list, send email to:
security-alert@sun.com
with a subject line (not body) containing one of the following commands:
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subscribe cws your-email-address
Note that your-email-address should be substituted
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unsubscribe Sender is removed from the CWS mailing list.
______________________________________________________________________________
[ End Sun Microsystems Advisory ]
______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
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