[ISN] Security firm finds a hole in Sun One

From: InfoSec News (isnat_private)
Date: Mon Mar 17 2003 - 03:14:45 PST

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    By David Legard
    IDG News Service
    Security specialist @Stake says that a module that ships with Sun's
    Sun One Application Server has a flaw which could be exploited by
    outside attackers and which could give them control of the running Web
    The flaw is in the Connector Module, a Netscape Server Application
    Programming Interface (NSAPI) plug-in that integrates the Sun One Web
    Server with the Application Server.
    An overly long URI in an incoming HTTP request handled by the module
    could cause a stack buffer overflow, @Stake said in an advisory
    The flaw affects Sun One Application Server 6.0 and Sun One
    Application Server 6.5. A patch is available for Version 6.5.
    No patch is available for Version 6.0, according to @Stake, but there
    are a number of workarounds.
    These include:
    * Writing an NSAPI module to inspect the length of HTTP request URIs.
    * Terminating the Secure Sockets Layer (SSL) session on a device
      before the Sun ONE Web server and installing an Intrusion Detection
      System sensor to monitor the clear-text traffic.
    * Terminating the SSL session on a reverse proxy that performs data
      validation on all HTTP request headers.
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