March 2005

ID: 00225
Ref: 204/2005
Date: 18 March 2005:15:17:44
Version: 1

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Title: Sun Alert Notification 57710 - Security Vulnerability in the newgrp(1) Command May Allow Unauthorized Root Privileges
Abstract: A buffer overflow in newgrp(1) may allow a local unprivileged user the ability to gain root privileges.
Vendors affected: Sun
Operating systems affected: Sun
Applications affected: Sun

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Title
=====

Sun Alert Notification 57710 - Security Vulnerability in the newgrp(1)
Command May Allow Unauthorized Root Privileges

Detail
======

A buffer overflow in newgrp(1) may allow a local unprivileged user the
ability to gain root privileges.




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ESB-2005.0221 -- Sun Alert Notification 57710
Security Vulnerability in the newgrp(1) Command May Allow
Unauthorized Root Privileges
18 March 2005

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Product: newgrp
Publisher: Sun Microsystems
Operating System: Solaris
Platform: SPARC
IA-32
Impact: Root Compromise
Access: Existing Account

Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57710-1

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Sun(sm) Alert Notification
* Sun Alert ID: 57710
* Synopsis: Security Vulnerability in the newgrp(1) Command May
Allow Unauthorized Root Privileges
* Category: Security
* Product: Solaris
* BugIDs: 4705393
* Avoidance: Workaround, Patch
* State: Resolved
* Date Released: 16-Mar-2005
* Date Closed: 16-Mar-2005
* Date Modified:

1. Impact A buffer overflow in newgrp(1) may allow a local
unprivileged user the ability to gain root privileges.

2. Contributing Factors This issue can occur in the following
releases:

SPARC Platform

* Solaris 7 without patch [2]118737-01
* Solaris 8 without patch [3]116993-01
* Solaris 9 without patch [4]117445-01

x86 Platform

* Solaris 7 without patch [5]118738-01
* Solaris 8 without patch [6]116994-01
* Solaris 9 without patch [7]117446-01

Note: Solaris 10 is not affected by this issue.
addressed
3. Symptoms There are no predictable symptoms that would indicate the
described issue has been exploited.

Solution Summary [8]Top

4. Relief/Workaround To work around the described issue, sites may
wish to remove the "setuid" permissions from the newgrp(1) utility
until patches can be applied to the system. This can be done by
issuing the following command:

# chmod u-s /usr/bin/newgrp

Note: Removing the set-user-ID bit from the newgrp(1) utility will
prevent unprivileged users from using the newgrp(1) command.

5. Resolution This issue is addressed in the following releases:

SPARC Platform

* Solaris 7 with patch [9]118737-01 or later
* Solaris 8 with patch [10]116993-01 or later
* Solaris 9 with patch [11]117445-01 or later

x86 Platform

* Solaris 7 with patch [12]118738-01 or later
* Solaris 8 with patch [13]116994-01 or later
* Solaris 9 with patch [14]117446-01 or later

This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.

Copyright 2000-2005 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved.

References

1. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57710-1#top
2. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118737-01-1
3. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116993-01-1
4. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117445-01-1
5. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118738-01-1
6. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116994-01-1
7. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117446-01-1
8. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57710-1#top
9. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118737-01-1
10. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116993-01-1
11. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117445-01-1
12. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118738-01-1
13. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116994-01-1
14. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117446-01-1

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