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AWS Hash Collisions

AWS Hash Collisions
Posted Jan 28, 2012
Site adacore.com

AdaCore Security Advisory - All AWS releases and wavefronts prior to 2012-01-21 suffer from hash collision vulnerabilities.

tags | advisory, vulnerability
MD5 | 033eef4cea8ba40ff2b4c809bc9b264e

AWS Hash Collisions

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AdaCore Security Advisory
=========================

SA-2012-L119-003 Hash collisions in AWS

Problem: Impacted versions of AWS store key/value pairs from submitted
form data in hash tables using a hash function that has
predictable collisions. As a result, a single specially crafted
HTTP request can cause the server to use hours of CPU time,
thus causing a denial of service.

Impact: All AWS releases and wavefronts prior to 2012-01-21

Status: This was fixed in AWS 2.11 and 2.10.2 on 2012-01-21

References: n.runs-SA-2011.004
http://www.nruns.com/_downloads/advisory28122011.pdf

Effective Denial of Service attacks against
web application platforms :: AWS round
http://ogrod2.blogspot.com/2012/01/28c3-effective-denial-of-service.html

AWS
http://www.adacore.com/home/products/gnatpro/add-on_technologies/web_technologies
http://forge.open-do.org/projects/aws/

History: 2012-01-27 First published

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