AN HTTPD Server cmdIS.DLL plug-in buffer overflow
| an-httpd-cmdisdll-bo (20029) |  High Risk |
Description:
AN HTTPD Server is vulnerable to a buffer overflow caused by improper bounds checking of user-supplied input in the cmdIS.DLL plug-in. The AN HTTPD Server fails to properly filter received URI before it is written to the logfile. By sending a long string containing 8300 bytes in the user-agent, host, or accept-encoding HTTP headers, a remote attacker could overflow a buffer and inject arbitrary commands into the logfile to corrupt the logfile or cause the server to crash.
Note: In order to exploit this vulnerability, a BAT file must be present on the server that uses the set command. The cmdIS.DLL must also be accessible from the document root.
Platforms Affected:
- Microsoft, Windows 2000 SP4
- Microsoft, Windows XP SP2
- nakata, AN HTTPD 1.42n
Remedy:
No remedy available as of July 4, 2009.
Consequences:
Gain Access
References:
- SIG^2 Vulnerability Research Advisory, AN HTTPD Server cmdIS.DLL Buffer Overflow and LogFile Arbitrary Character Injection Vulnerabilities at http://www.security.org.sg/vuln/anhttpd142n.html.
- BID-13066: AN HTTPD CMDIS.DLL Remote Buffer Overflow Vulnerability
- CVE-2005-1086: Buffer overflow in the cmdIS.DLL plugin for AN HTTPD Server 1.42n allows remote attackers to execute arbitrary code via an HTTP request with a long User-Agent header.
- OSVDB ID: 15361: AN HTTPD Server cmdIS.DLL user-agent Field Remote Overflow
- SA14861: AN HTTPD Multiple Vulnerabilities
- SECTRACK ID: 1013666: AN HTTP Server `cmdIS.DLL` Buffer Overflow Lets Local Users Execute Arbitrary Code and Remote Users Conduct Cross-Site Scripting Attacks
Reported:
Apr 08, 2005
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