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[ For Public Release ]
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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
SunOS eeprom Vulnerability
June 25, 1997 16:00 GMT Number H-72
______________________________________________________________________________
PROBLEM: A buffer overflow vulnerability has been identified in the
eeprom program.
PLATFORM: SunOS versions 5.3-5.5.1 (Solaris 2.3-2.5.1) for SPARC only.
DAMAGE: This vulnerability may allow local users to gain root
privileges.
SOLUTION: Apply vendor patches specified in Section 4.
______________________________________________________________________________
VULNERABILITY It is highly recommended that patches be installed immediately.
ASSESSMENT:
______________________________________________________________________________
[ Start Sun Microsystems Advisory ]
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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00143
Date: June 24 1997
Cross-Ref:
Title: Vulnerability in eeprom
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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), that relate to a vulnerability in the
eeprom program.
Sun strongly recommends that you install the patches listed in section 4
immediately on every affected system.
2. Who is Affected
Vulnerable: SunOS versions 5.5.1, 5.5, 5.4, and 5.3 for SPARC
only.
Not vulnerable: All other supported versions of SunOS
The vulnerability is fixed in the upcoming release of Solaris.
3. Understanding the Vulnerability
The eeprom program changes or displays the values of parameters in EEPROM.
The EEPROM (Electrically erasable programmable read-only memory) is a
non-volatile PROM that holds information about the current system
configuration, alternate boot paths, and other information. Due to
insufficient bounds checking on arguments passed to the eeprom program,
it is possible to overwrite the internal stack space of eeprom while it is
executing. Since eeprom has setgid bin permissions, this vulnerability may
allow non-privileged users to gain privileged access, including root
privileges.
4. List of Patches
The vulnerability in eeprom is fixed by the following patches:
OS version Patch ID
---------- --------
SunOS 5.5.1 104795-01
SunOS 5.5 104796-01
SunOS 5.4 104798-01
SunOS 5.3 104797-01
Intel x86 systems do not have the eeprom program and are not
affected by this vulnerability.
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:
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
- --------------- --------- --------- --------------------------------
104795-01.tar.Z 03357 150 64333 300 3004B44BE2742A51A593DE8B76679768
104796-01.tar.Z 12042 150 18119 299 92DA0C5513E191A4C3719B3EFFB1B935
104798-01.tar.Z 40939 166 63088 332 DD89275C55397A97C4B06D1E5037723F
104797-01.tar.Z 59061 165 27937 330 BE97B2DD42A890F4E736A323E3CD8A4A
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APPENDICES
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
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:
http://sunsolve1.sun.com/sunsolve/secbulletins
C. 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
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- ------------------------------------------------------------------------------
[ End Sun Microsystems Advisory ]
______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
______________________________________________________________________________
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