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UnZip 6.0 Heap Buffer Overflow

UnZip 6.0 Heap Buffer Overflow
Posted Dec 22, 2014
Authored by Andrea Barisani, Open Source CERT

UnZip versions 6.0 and below suffer from multiple heap-based buffer overflow vulnerabilities.

tags | advisory, overflow, vulnerability
advisories | CVE-2014-8139, CVE-2014-8140, CVE-2014-8141
SHA-256 | 3be56fd57959f7da1359a14b848ad60e6021fb8ff555ec02f94fcdda37fffeaf

UnZip 6.0 Heap Buffer Overflow

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#2014-011 UnZip input sanitization errors

Description:

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
vulnerability.

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)

Timeline:

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

References:
http://www.info-zip.org/UnZip.html

Permalink:
http://www.ocert.org/advisories/ocert-2014-011.html

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

<lcars@ocert.org> http://www.ocert.org
0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E
"Pluralitas non est ponenda sine necessitate"
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