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TITLE:
Xitami "If-Modified-Since" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA26884

VERIFY ADVISORY:
http://secunia.com/advisories/26884/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
Xitami 2.x
http://secunia.com/product/154/

DESCRIPTION:
Krystian Kloskowski has discovered a vulnerability in Xitami, which
can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to a boundary error when processing
HTTP requests. This can be exploited to cause a stack-based buffer
overflow by sending a specially crafted HTTP request containing an
overly long "If-Modified-Since" header.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 2.5c2. Other versions may
also be affected.

SOLUTION:
Restrict access to the web server.

Use another product.

PROVIDED AND/OR DISCOVERED BY:
Krystian Kloskowski

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/4450

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