Macromedia JRun Oversized URI Buffer Overflow Vulnerability

Risk
High

Date Discovered
11-07-2002

Description
Macromedia JRun is prone to a remotely exploitable buffer overflow condition. This issue is due to insufficient bounds checking of URIs in incoming web requests.

Exploitation may allow a remote attacker to execute arbitrary code with the privileges of the JRun server process.

This issue is specific to JRun running on Microsoft Windows platforms.

Platforms Affected
IBM AIX 4.2
IBM AIX 4.3
Microsoft IIS 4.0
Microsoft IIS 5.0
Microsoft IIS 5.1
Microsoft Windows 2000 Workstation
Microsoft Windows 2000 Workstation SP1
Microsoft Windows 2000 Workstation SP2
Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows NT 4.0
Microsoft Windows NT 4.0 SP1
Microsoft Windows NT 4.0 SP2
Microsoft Windows NT 4.0 SP3
Microsoft Windows NT 4.0 SP4
Microsoft Windows NT 4.0 SP5
Microsoft Windows NT 4.0 SP6
Microsoft Windows NT 4.0 SP6a
RedHat Linux 6.0
RedHat Linux 6.0 alpha
RedHat Linux 6.0 sparc
RedHat Linux 6.1 alpha
RedHat Linux 6.1 i386
RedHat Linux 6.1 sparc
SGI IRIX 6.5
Sun Solaris 2.6
Sun Solaris 7.0
Sun Solaris 8.0

Components Affected
Macromedia JRun 3.0
Macromedia JRun 3.1
Macromedia JRun 4.0

Recommendations
Block external access at the network boundary, unless service is required by external parties.
If appropriate, block external access to the server at the network boundary. Filter untrusted or malicious network traffic at border routers and network firewalls.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy network intrusion detection systems (NIDS). Audit NIDS and webserver logs for signs of malicious network activity.

Run all server processes as non-privileged users with minimal access rights.
Running the server with the least privileges required will reduce the consequences of successful exploitation.

Macromedia has released patches to address this issue.


Macromedia JRun 3.0:

Macromedia Upgrade JRun 3.0 Windows Upgrade 53843
http://www.macromedia.com/v1/handlers/index.cfm?ID=23500

Macromedia Upgrade JRun 3.1 Windows Upgrade 54009
http://www.macromedia.com/v1/handlers/index.cfm?ID=23500

Macromedia Upgrade JRun 4.0 Windows Upgrade SP1
http://www.macromedia.com/v1/handlers/index.cfm?ID=23500

References
Source: MPSB02-12 - Cumulative Security Patch available for JRun 3.0, 3.1 and 4.0
URL: http://www.macromedia.com/v1/handlers/index.cfm?ID=23500

Credits
This issue was reported in a Macromedia security alert. Discovery of this issue appears to be credited to Marc Maiffret of eEye Digital Security.

Copyright (c) 2002 by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from symsecurity@symantec.com.

Disclaimer
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