5315 : IRIX xfsmd RPC Weak Authentication Privilege Escalation
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Timeline

Disclosure Date
2002-06-20

Description

IRIX contains a flaw that may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when a malicious attacker bypasses the AUTH_UNIX authentication scheme used by the xfsmd daemon and issues remote procedure calls that mount, unmount, create, delete or modify xfs file systems. This flaw is leveraged to obtain root privileges, resulting in a loss of integrity.

Classification

Location: Remote / Network Access
Attack Type: Authentication Management
Impact: Loss of Integrity
Exploit: Exploit Public

Solution

Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround: disable the daemon.

# killall /usr/etc/xfsmd

# vi /etc/inetd.conf

Look for a line in inetd.conf that looks like this:

sgi_xfsmd/1 stream rpc/tcp wait root ?/usr/etc/xfsmd xfsmd

...and comment it out by putting a "#" at the beginning of the line:

#sgi_xfsmd/1 stream rpc/tcp wait root ?/usr/etc/xfsmd xfsmd

...or simply remove the line from the file.

# killall -HUP inetd

Products

SGI	IRIX	6.2
		6.3
		6.4
		6.5
		6.5.1
		6.5.2
		6.5.3
		6.5.4
		6.5.5
		6.5.6
		6.5.7
		6.5.8
		6.5.9
		6.5.10
		6.5.11
		6.5.12
		6.5.13
		6.5.14
		6.5.15
		6.5.16

References

CVE ID: 2002-0359 (see also: NVD)
Bugtraq ID: 5072
CERT VU: 521147
ISS X-Force ID: 9401
Vendor Specific Advisory URL: ftp://patches.sgi.com/support/free/security/advisories/20020606-01-I ftp://patches.sgi.com/support/free/security/advisories/20020606-02-I
Vendor Specific Solution URL: ftp://patches.sgi.com/support/free/security/advisories/20020606-01-I ftp://patches.sgi.com/support/free/security/advisories/20020606-02-I
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2002-06/0252.html
Generic Exploit URL: http://lsd-pl.net/code/IRIX/irx_xfsmd.c
Other Advisory URL: http://www.securityfocus.com/advisories/4221

Tools & Filters

Snort	2081 2082 2083 2084

Credit

Last Stage of Delirium Research Group - contactlsd-pl.net - Last Stage of Delirium Research Group

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

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