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Category:   OS (UNIX)  >   Rpcbind Vendors:   Sun
Sun Solaris rpcbind Bug Lets Remote Users Deny Service on the System
SecurityTracker Alert ID:  1006131
SecurityTracker URL:  http://securitytracker.com/id/1006131
CVE Reference:   CVE-2003-1079   (Links to External Site)
Updated:  Jul 6 2008
Original Entry Date:  Feb 19 2003
Impact:   Denial of service via local system, Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Solaris 2.6, 7, 8, 9
Description:   A denial of service vulnerability was reported in Sun Solaris in rpcbind. A remote user can cause the system to consume all available memory.

A remote user can reportedly send specific UDP RPC packets to a target server to cause the target server to allocate large amounts of memory, eventually exhausting the swap space and disabling the system.

According to Sun, misbehaving RPC clients, hardware errors, or malicious local or remote users could generate the RPC packets required to cause this behavior.

Impact:   A remote user can cause the target server to consume all available memory and become disabled.
Solution:   Sun has issued the following fixes:

SPARC

Solaris 2.6: patch 105401-41
Solaris 7: patch 106942-24
Solaris 8: patch 108827-36
Solaris 9: patch 113319-04

Intel

Solaris 2.6: patch 105402-41
Solaris 7: patch 106943-24
Solaris 8: patch 108828-37

Solaris 2.5.1 users should upgrade to Solaris 2.6 (or later) and apply the appropriate patches.

According to Sun, Sun Alert document 50747 describes potential side effects of installing the above patches. However, upon analysis of the referenced Alert document, it is not clear what the vendor means.

Vendor URL:  sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F50626 (Links to External Site)
Cause:   Exception handling error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  Wed, 19 Feb 2003 14:03:48 -0500
Subject:  Sun Alert 50626


http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F50626

Sun issued an alert (50626) warning of a denial of service vulnerability in Sun Solaris in rpcbind.

A remote user can reportedly send specific UDP RPC packets to a target server to cause the target
server to allocate large memory amounts, eventually exhausting the swap space and disabling the
system. 

According to Sun, misbehaving RPC clients, hardware errors, or malicious local or remote users could
generate the RPC packets required to cause this behavior.

Solaris 2.5.1, 2.6, 7, 8, and 9 are affected.  Sun will not evalute Solaris 2.5.1 to determine if it
is affected. 

Several potential symptoms are described in the alert (see the above listed URL).

Sun has issued the following fixes:

SPARC 

Solaris 2.6 with patch 105401-41 or later 
Solaris 7 with patch 106942-24 or later 
Solaris 8 with patch 108827-36 or later 
Solaris 9 with patch 113319-04 or later 
Intel 

Solaris 2.6 with patch 105402-41 or later 
Solaris 7 with patch 106943-24 or later 
Solaris 8 with patch 108828-37 or later 

Solaris 2.5.1 users should upgrade to Solaris 2.6 (or later) and apply the appropriate patches. 

According to Sun, Sun Alert document 50747 describes potential side effects of installing the above
patches.   However, upon analysis of the referenced Alert document, it is not clear what the vendor
means.

-----

Sun Alert ID: 50626 
Synopsis: Certain UDP RPC Packets May Cause a Denial of Service in Solaris 
Category: Security 
Product: Solaris 
BugIDs: 4680691 
Avoidance: Patch 
State: Resolved 
Date Released: 18-Feb-2003 
Date Closed: 18-Feb-2003 
Date Modified:


 
 


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