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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2002.304 -- SGI Security Advisory
nveventd vulnerability
26 June 2002
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: nveventd
Vendor: SGI
Operating System: IRIX 6.5.x
Impact: Overwrite Arbitrary Files
Root Compromise
Access Required: Existing Account
Comments: IRIX releases prior to 6.5 are retired, their vulnerability to
this issue is unknown - SGI recommends upgrading to a supported
operating system release.
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_____________________________________________________________________________
SGI Security Advisory
Title: nveventd vulnerability
Number: 20020607-02-I
Date: June 24, 2002
Reference: CAN-2002-0631
_____________________________________________________________________________
- - --------------
- - --- Update ---
- - --------------
Fixed formatting issue which caused PGP signature failure on some mailers.
- - -----------------------
- - --- Issue Specifics ---
- - -----------------------
It's been reported that the /usr/NetVis/etc/nveventd component of
NetVisualyzer can be configured to allow an unprivileged user to write to
any file on the system. This could potentially lead to a root exploit.
SGI has investigated the issue and recommends the following steps for
neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be
implemented on ALL vulnerable SGI systems.
Since the NetVisualyzer product is being moved to Legacy support mode, SGI
has no plans to fix this problem and advises following the workaround
outlined in this bulletin.
- - --------------
- - --- Impact ---
- - --------------
The /usr/NetVis/etc/nveventd daemon is part of the optional NetVisualyzer
(specifically, "netman_display.sw.links") package, and is not installed by
default on IRIX 6.5 systems.
To determine the version of IRIX you are running, execute the following
command:
# uname -R
That will return a result similar to the following:
# 6.5 6.5.15f
The first number ("6.5") is the release name, the second ("6.5.15f" in this
case) is the extended release name. The extended release name is the
"version" we refer to throughout this document.
To see if nveventd is installed, execute the following command:
# versions netman_display.sw.links
I = Installed, R = Removed
Name Date Description
I netman_display 05/22/101 NetVisualyzer Display Station
Version, 2.2.1
I netman_display.sw 05/22/101 NetVisualyzer Display Station
Software
I netman_display.sw.links 05/22/101 NetVisualyzer Display Station
Software Links
If the output resembles the above, then the package is installed and the
system is vulnerable.
This vulnerability was assigned the following CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0631
- - ----------------------------
- - --- Temporary Workaround ---
- - ----------------------------
SGI will not be releasing patches for this problem, as the product is being
moved into Legacy support mode. Instead, we recommend removing the suid bit
from the nveventd binary by performing the following command:
# chmod u-s /usr/NetVis/etc/nveventd
After running that command, the permissions and ownership should look like
this:
# ls -l /usr/NetVis/etc/nveventd
-r-xr-xr-x 1 root sys 70468 May 22 2001 /usr/NetVis/etc/nveventd
This will fix the problem, and no further action is required. Note that
after doing this, only privileged users (typically root) will be able to
run nveventd.
- - ----------------
- - --- Solution ---
- - ----------------
SGI will not be providing a fix or patches for this issue, as the product
is being moved into Legacy support mode. Our recommendation is to follow
the instructions in the Temporary Workaround section above.
OS Version Vulnerable? Patch # Other Actions
---------- ----------- ------- -------------
IRIX 3.x unknown Note 1
IRIX 4.x unknown Note 1
IRIX 5.x unknown Note 1
IRIX 6.0.x unknown Note 1
IRIX 6.1 unknown Note 1
IRIX 6.2 unknown Note 1
IRIX 6.3 unknown Note 1
IRIX 6.4 unknown Note 1
IRIX 6.5 yes Notes 2 & 3
IRIX 6.5.1 yes Notes 2 & 3
IRIX 6.5.2 yes Notes 2 & 3
IRIX 6.5.3 yes Notes 2 & 3
IRIX 6.5.4 yes Notes 2 & 3
IRIX 6.5.5 yes Notes 2 & 3
IRIX 6.5.6 yes Notes 2 & 3
IRIX 6.5.7 yes Notes 2 & 3
IRIX 6.5.8 yes Notes 2 & 3
IRIX 6.5.9 yes Notes 2 & 3
IRIX 6.5.10 yes Notes 2 & 3
IRIX 6.5.11 yes Notes 2 & 3
IRIX 6.5.12 yes Notes 2 & 3
IRIX 6.5.13 yes Notes 2 & 3
IRIX 6.5.14 yes Notes 2 & 3
IRIX 6.5.15 yes Notes 2 & 3
IRIX 6.5.16 yes Notes 2 & 3
NOTES
1) This version of the IRIX operating has been retired. Upgrade to an
actively supported IRIX operating system. See
http://support.sgi.com/irix/news/index.html#policy for more
information.
2) If you have not received an IRIX 6.5.X CD for IRIX 6.5, contact your
SGI Support Provider or URL: http://support.sgi.com/irix/swupdates/
3) Follow the workaround instructions above.
- - ------------------------
- - --- Acknowledgments ----
- - ------------------------
SGI wishes to thank Walter Roberson for his assistance in this matter.
SGI also wishes to thank Dave Ahmad for catching the bad PGP signature.
- - -------------
- - --- Links ---
- - -------------
SGI Security Advisories can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/advisories/
SGI Security Patches can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/patches/
SGI patches for IRIX can be found at the following patch servers:
http://support.sgi.com/irix/ and ftp://patches.sgi.com/
SGI freeware updates for IRIX can be found at:
http://freeware.sgi.com/
SGI fixes for SGI open sourced code can be found on:
http://oss.sgi.com/projects/
SGI patches and RPMs for Linux can be found at:
http://support.sgi.com/linux/ or
http://oss.sgi.com/projects/sgilinux-combined/download/security-fixes/
SGI patches for Windows NT or 2000 can be found at:
http://support.sgi.com/nt/
IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at:
http://support.sgi.com/irix/ and ftp://patches.sgi.com/support/patchset/
IRIX 6.5 Maintenance Release Streams can be found at:
http://support.sgi.com/colls/patches/tools/relstream/index.html
IRIX 6.5 Software Update CDs can be obtained from:
http://support.sgi.com/irix/swupdates/
The primary SGI anonymous FTP site for security advisories and patches is
patches.sgi.com (216.32.174.211). Security advisories and patches are
located under the URL ftp://patches.sgi.com/support/free/security/
For security and patch management reasons, ftp.sgi.com (mirrors
patches.sgi.com security FTP repository) lags behind and does not do a
real-time update.
- - -----------------------------------------
- - --- SGI Security Information/Contacts ---
- - -----------------------------------------
If there are questions about this document, email can be sent to
security-info@sgi.com.
------oOo------
SGI provides security information and patches for use by the entire SGI
community. This information is freely available to any person needing the
information and is available via anonymous FTP and the Web.
The primary SGI anonymous FTP site for security advisories and patches is
patches.sgi.com (216.32.174.211). Security advisories and patches are
located under the URL ftp://patches.sgi.com/support/free/security/
The SGI Security Headquarters Web page is accessible at the URL:
http://www.sgi.com/support/security/
For issues with the patches on the FTP sites, email can be sent to
security-info@sgi.com.
For assistance obtaining or working with security patches, please
contact your SGI support provider.
------oOo------
SGI provides a free security mailing list service called wiretap and
encourages interested parties to self-subscribe to receive (via email) all
SGI Security Advisories when they are released. Subscribing to the mailing
list can be done via the Web
(http://www.sgi.com/support/security/wiretap.html) or by sending email to
SGI as outlined below.
% mail wiretap-request@sgi.com
subscribe wiretap <YourEmailAddress>
end
^d
In the example above, <YourEmailAddress> is the email address that you wish
the mailing list information sent to. The word end must be on a separate
line to indicate the end of the body of the message. The control-d (^d) is
used to indicate to the mail program that you are finished composing the
mail message.
------oOo------
SGI provides a comprehensive customer World Wide Web site. This site is
located at http://www.sgi.com/support/security/ .
------oOo------
If there are general security questions on SGI systems, email can be sent to
security-info@sgi.com.
For reporting *NEW* SGI security issues, email can be sent to
security-alert@sgi.com or contact your SGI support provider. A support
contract is not required for submitting a security report.
______________________________________________________________________________
This information is provided freely to all interested parties
and may be redistributed provided that it is not altered in any
way, SGI is appropriately credited and the document retains and
includes its valid PGP signature.
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