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TITLE:
Apache HTTP Server ByteRange Filter Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA45606

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45606/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45606

RELEASE DATE:
2011-08-24

DISCUSS ADVISORY:
http://secunia.com/advisories/45606/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/45606/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=45606

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
Kingcope has discovered a vulnerability in Apache HTTP Server, which
can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error within the ByteRange
filter when processing requests containing a large amount of ranges,
which can be exploited to exhaust memory via specially crafted HTTP
requests sent to the server.

The vulnerability is confirmed in version 2.2.19. Other versions may
also be affected.

SOLUTION:
Use a proxy to filter requests containing a large number of ranges.

PROVIDED AND/OR DISCOVERED BY:
Kingcope

ORIGINAL ADVISORY:
Kingcope:
http://archives.neohapsis.com/archives/fulldisclosure/2011-08/0203.html
https://issues.apache.org/bugzilla/show_bug.cgi?id=51714

http://mail-archives.apache.org/mod_mbox/httpd-dev/201108.mbox/%3Calpine.DEB.2.00.1108231306230.24177@eru.sfritsch.de%3E

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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