(Red Hat Issues Fix) PHP Hash Table Collision Bug Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1026597 |
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SecurityTracker URL: http://securitytracker.com/id/1026597
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CVE Reference:
CVE-2011-4885
(Links to External Site)
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Date: Jan 30 2012
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
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Version(s): 5.3.8 and prior versions
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Description:
A vulnerability was reported in PHP. A remote user can cause denial of service conditions.
A remote user can send specially crafted POST request values to trigger hash collisions and cause significant performance degradation on the target server.
The original advisory is available at:
http://www.nruns.com/_downloads/advisory28122011.pdf
Alexander Klink of n.runs AG and Julian Walde of Technische Universitat Darmstadt reported this vulnerability. Scott A. Crosby and Dan S. Wallach of Rice University reported the theoretical attack.
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Impact:
A remote user can cause performance to degrade on the target server.
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Solution:
Red Hat has issued a fix.
The Red Hat advisory is available at:
https://rhn.redhat.com/errata/RHSA-2012-0071.html
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Vendor URL: www.php.net/ (Links to External Site)
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Cause:
Randomization error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 30 Jan 2012 19:59:49 +0000
Subject: [RHSA-2012:0071-01] Moderate: php security update
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CVE-2011-0708 CVE-2011-1466 CVE-2011-2202
CVE-2011-4566 CVE-2011-4885
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