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Vulnerability Details : CVE-2007-0086

** DISPUTED ** The Apache HTTP Server, when accessed through a TCP connection with a large window size, allows remote attackers to cause a denial of service (network bandwidth consumption) via a Range header that specifies multiple copies of the same fragment. NOTE: the severity of this issue has been disputed by third parties, who state that the large window size required by the attack is not normally supported or configured by the server, or that a DDoS-style attack would accomplish the same goal.
Publish Date : 2007-01-05 Last Update Date : 2008-11-15
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID CWE id is not defined for this vulnerability

- Vendor Statements

Red Hat does not consider this issue to be a security vulnerability. The pottential attacker has to send acknowledgement packets periodically to make server generate traffic. Exactly the same effect could be achieved by simply downloading the file. The statement that setting the TCP window size to arbitrarily high value would permit the attacker to disconnect and stop sending ACKs is false, because Red Hat Enterprise Linux limits the size of the TCP send buffer to 4MB by default.
Source: Redhat

- Products Affected By CVE-2007-0086

# Product Type Vendor Product Version Update Edition Language
1 Application Apache Http Server Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apache Http Server 1

- References For CVE-2007-0086

http://www.securityfocus.com/archive/1/455879/100/0/threaded
BUGTRAQ 20070104 Re: a cheesy Apache / IIS DoS vuln (+a question)
http://www.securityfocus.com/archive/1/455882/100/0/threaded
BUGTRAQ 20070104 Re: a cheesy Apache / IIS DoS vuln (+a question)
http://www.securityfocus.com/archive/1/455920/100/0/threaded
BUGTRAQ 20070104 Re: a cheesy Apache / IIS DoS vuln (+a question)
http://www.securityfocus.com/archive/1/archive/1/455833/100/0/threaded
BUGTRAQ 20070103 a cheesy Apache / IIS DoS vuln (+a question)
http://osvdb.org/33456
OSVDB 33456

- Metasploit Modules Related To CVE-2007-0086

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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