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Apache Commons Compress / Apache Ant Denial Of Service

Apache Commons Compress / Apache Ant Denial Of Service
Posted May 24, 2012
Authored by David Jorm

Apache Commons Compress versions 1.0 through 1.4 and Apache Ant versions 1.5 through 1.8.3 suffer from a denial of service vulnerability. The bzip2 compressing streams in Apache Commons Compress and Apache Ant internally use sorting algorithms with unacceptable worst-case performance on very repetitive inputs. A specially crafted input to Compress' BZip2CompressorOutputStream or Ant's <bzip2> task can be used to make the process spend a very long time while using up all available processing time effectively leading to a denial of service.

tags | advisory, denial of service
advisories | CVE-2012-2098
MD5 | 17555b0ed05795db50cf85fee87064ec

Apache Commons Compress / Apache Ant Denial Of Service

Change Mirror Download
CVE-2012-2098: Apache Commons Compress and Apache Ant denial of service
vulnerability

Severity: Low

Vendor:
The Apache Software Foundation

Versions Affected:
Apache Commons Compress 1.0 to 1.4
Apache Ant 1.5 to 1.8.3

Description:
The bzip2 compressing streams in Apache Commons Compress and Apache Ant
internally use sorting algorithms with unacceptable worst-case
performance on very repetitive inputs. A specially crafted input to
Compress' BZip2CompressorOutputStream or Ant's <bzip2> task can be used
to make the process spend a very long time while using up all available
processing time effectively leading to a denial of service.

Mitigation:
Commons Compress users should upgrade to 1.4.1
Ant users should upgrade to 1.8.4

Credit:
This issue was discovered by David Jorm of the Red Hat Security Response
Team.

References:
http://commons.apache.org/compress/security.html
http://ant.apache.org/security.html

Stefan Bodewig
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