|Bugzilla:||750533: CVE-2012-2739 java: hash table collisions CPU usage DoS (oCERT-2011-003)|
The MITRE CVE dictionary describes this issue as:
Oracle Java SE before 7 Update 6, and OpenJDK 7 before 7u6 build 12 and 8 before build 39, computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.
This flaw affects various versions of Java as shipped with Red Hat products. A patch is available for Java 7 and Java 8, but not for previous versions of Java shipped with Red Hat products. Although no patch is available for previous versions of Java as shipped with Red Hat products, the impact of this flaw has been addressed in several components that utilize Java HashMap in such a way that may expose a denial of service flaw.
CVSS v2 metrics
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
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Red Hat security errata
Red Hat would like to thank oCERT for reporting this issue. oCERT acknowledges Julian Wälde and Alexander Klink as the original reporters.
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