26th Jun 2002 [SBWID-5485]
COMMAND
NetVisualyzer nveventd arbitrary file writing
SYSTEMS AFFECTED
Up to 6.5.16 (included)
PROBLEM
In SGI Security Advisory 20020607-02-I (a lot of garbage, but as
specified in the copyright notice we can not reproduce only interesting
parts...):
-----BEGIN PGP SIGNED MESSAGE-----
_____________________________________________________________________________
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
SOLUTION
- ----------------------------
- --- 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
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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
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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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