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Category:   Application (Generic)  >   Webalizer Vendors:   Barrett, Bradford L.
(Vendor Issues Fix But Disputes Impact) Re: Webalizer Buffer Overflow Allows Remote Users to Execute Arbitrary Code on the Server via Reverse DNS Lookups
SecurityTracker Alert ID:  1004087
SecurityTracker URL:  http://securitytracker.com/id/1004087
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Apr 17 2002
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.01-09, 2.01-06
Description:   A buffer overflow vulnerability was reported in Webalizer, a log file analysis tool. A remote user can cause arbitrary code to be executed on the server.

If Webalizer is configured to perform reverse DNS lookups (which is apparently not the default configuration), a remote user with control over a DNS service can cause arbitrary code to be executed by Webalizer. No further details were provided.

Note that the vendor does not believe that this buffer overflow can be exploited to gain root access.

Impact:   A remote user with control over a DNS server can cause Webalizer to execute arbitrary code on the Webalizer host when performing a reverse DNS lookup.

The vendor disputes this claim, stating that the buffer overflow was incorrectly reported as a remote buffer overflow that allows a root compromise.

Solution:   The vendor has released a fixed version (2.01-10), available at:

http://www.mrunix.net/webalizer/download.html

Vendor URL:  www.mrunix.net/webalizer/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  BeOS, Linux (Any), OpenVMS, UNIX (Any)

Message History:   This archive entry is a follow-up to the message listed below.
Apr 15 2002 Webalizer Buffer Overflow Allows Remote Users to Execute Arbitrary Code on the Server via Reverse DNS Lookups



 Source Message Contents

Subject:  Webalizer bug fix


Version 2.01-10 has been released. This version is only a bug fix
release with no new features added. It corrects some problems with
extended characters, mismatched KByte totals, blank hostname weirdness
and a very obscure buffer overflow. The buffer overflow was incorrectly
reported to BugTraq as a remote buffer overflow that allows a root
compromise. Unless you believe that any buffer overflow allows root
access to a box, this is quite a stretch. Anyway, I took the oppertunity
to not only fix the obscure buffer overflow, but some of the other minor
buglets that have surfaced in the last month or so.

http://www.mrunix.net/webalizer/news.html


 
 


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