CVE-2012-2098

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 12.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-06-29 · updated 2026-06-16
Weakness: CWE-310

Description

Algorithmic complexity vulnerability in the sorting algorithms in bzip2 compressing stream (BZip2CompressorOutputStream) in Apache Commons Compress before 1.4.1 allows remote attackers to cause a denial of service (CPU consumption) via a file with many repeating inputs.

Affected products

Apache Software Foundation Apache Commons Compress: before 1.4.1 — fixed in 1.4.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Commons Compress 1.4.1. Check the vendor advisory for mitigations.

References

http://ant.apache.org/security.html
http://archives.neohapsis.com/archives/bugtraq/2012-05/0130.html
http://commons.apache.org/compress/security.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081697.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081746.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105049.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105060.html
http://osvdb.org/82161
http://packetstormsecurity.org/files/113014/Apache-Commons-Compress-Apache-Ant-Denial-Of-Service.html
http://secunia.com/advisories/49255
http://secunia.com/advisories/49286
http://www-01.ibm.com/support/docview.wss?uid=swg21644047

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