Bug 1537055 – CVE-2018-1000032 unzip: Heap-based buffer overflow in charset_to_intern()

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Bug 1537055 - (CVE-2018-1000032) CVE-2018-1000032 unzip: Heap-based buffer overflow in charset_to_intern()

Summary:	CVE-2018-1000032 unzip: Heap-based buffer overflow in charset_to_intern()

Status:	NEW

Aliases:	CVE-2018-1000032

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	impact=moderate,public=20180207,repor...
Keywords:	Security

Depends On:	1537056 1543337
Blocks:	1537057
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Reported:	2018-01-22 06:05 EST by Adam Mariš
Modified:	2018-02-08 04:45 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:	unzip 6.1c23
Doc Type:	If docs needed, set a value
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2018-01-22 06:05:25 EST

Heap-based buffer overflow was found in charset_to_intern() function which can be used to write null-bytes out-of-bound when converting attacker-controlled strings to the local charset.

Comment 4 Adam Mariš 2018-01-22 07:57:39 EST

Acknowledgments:

Name: R. Freingruber (SEC Consult Vulnerability Lab)

Comment 5 Pedro Yóssis Silva Barbosa 2018-01-25 10:56:27 EST

Statement:

This issue did not affect the versions of unzip as shipped with Red Hat Enterprise Linux 5, 6, and 7, as they did not include the function charset_to_intern, or the code is different and does not contain the vulnerable part.

Comment 6 Adam Mariš 2018-02-08 04:02:08 EST

External References:

https://www.sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-infozip-unzip/index.html

Comment 7 Adam Mariš 2018-02-08 04:45:22 EST

Created unzip tracking bugs for this issue:

Affects: fedora-all [bug 1543337]

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