File: 2580.txt

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Rule:

--
Sid:
2580

--
Summary:
This event is generated when an attempt is made to exploit a heap overflow
associated with Apache 1.3 proxy and cache module.

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Impact:
A successful attack may cause a heap overflow, permitting the execution of
arbitrary code.

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Detailed Information:
When Apache 1.3 is used and the host is configured to be a web proxy,
reverse proxy and/or cache server, a vulnerability exists that may
allow a heap overflow and the subsequent execution of arbitrary code
on the vulnerable server.  This may occur when the server receives
a malformed response from a malicious web server that includes a
negative content length value.  This can cause invalid memory access
and a denial of service or heap overflow.

--
Affected Systems:
Apache 1.3.x

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Attack Scenarios:
An attacker can entice a user to visit a malicious web server.  If
a vulnerable server proxies the request and receives a malformed
response, a heap overflow may occur.

--
Ease of Attack:
Simple. Exploit code is publicly available.

--
False Positives:
None known.

--
False Negatives:
None known.

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Corrective Action:
Upgrade to the latest non-affected version of the software.

--
Contributors:
Sourcefire Research Team
Judy Novak <judy.novak@sourcefire.com>
Brian Caswell <bmc@sourcefire.com>

--
Additional References
CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0492

Other:
http://www.guninski.com/modproxy1.html

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