[oCERT-2014-011] UnZip input sanitization errors Dec 22 2014 02:09PM
Andrea Barisani (lcars ocert org)

#2014-011 UnZip input sanitization errors


The UnZip tool is an open source extraction utility for archives compressed in
the zip format.

The unzip command line tool is affected by heap-based buffer overflows within
the CRC32 verification, the test_compr_eb() and the getZip64Data() functions.
The input errors may result in in arbitrary code execution.

A specially crafted zip file, passed to unzip -t, can be used to trigger the

Affected version:

UnZip <= 6.0

Fixed version:

UnZip, N/A

Credit: vulnerability report received from the Google Security Team.

CVE: CVE-2014-8139 (CRC32 heap overflow), CVE-2014-8140 (test_compr_eb),
CVE-2014-8141 (getZip64Data)


2014-12-03: vulnerability report received
2014-12-03: contacted maintainer
2014-12-03: first patch provided by maintainer
2014-12-04: report provides additional reproducers
2014-12-03: second patch provided by maintainer
2014-12-04: reporter confirms patch
2014-12-10: contacted affected vendors
2014-12-12: assigned CVEs
2014-12-22: advisory release



Andrea Barisani | Founder & Project Coordinator
oCERT | OSS Computer Security Incident Response Team

<lcars (at) ocert (dot) org [email concealed]> http://www.ocert.org
0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E
"Pluralitas non est ponenda sine necessitate"

[ reply ]


Privacy Statement
Copyright 2010, SecurityFocus