Bug 1548018 – CVE-2018-1000097 sharutils: heap-buffer-overflow in find_archive in unshar.c

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Bug 1548018 - (CVE-2018-1000097) CVE-2018-1000097 sharutils: heap-buffer-overflow in find_archive in unshar.c

Summary:	CVE-2018-1000097 sharutils: heap-buffer-overflow in find_archive in unshar.c

Status:	NEW

Aliases:	CVE-2018-1000097

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

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20180221,reported=2...
Keywords:	Security

Depends On:	1548019 1554739 1554740
Blocks:	1548021
	Show dependency tree / graph

Reported:	2018-02-22 09:29 EST by Laura Pardo
Modified:	2018-03-29 18:05 EDT (History)
CC List:	2 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:	A heap-based out-of-bounds read flaw was found in the way Sharutils parsed archive files. An attacker could potentially use this flaw to crash Unshar by tricking it into processing crafted archive files.
Story Points:	---
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Last Closed:
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Regression:	---
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CRM:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
A proposed fix (2.34 KB, patch) 2018-02-22 11:04 EST, Petr Pisar	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Laura Pardo 2018-02-22 09:29:57 EST

A flaw was found in Sharutils 4.15.2, a heap buffer overflow in Unshar. This may allow an attacker to perform a Denial of Service attack or possible have another unspecified impact.

Comment 1 Laura Pardo 2018-02-22 09:30:23 EST

Created sharutils tracking bugs for this issue:

Affects: fedora-all [bug 1548019]

Comment 2 Petr Pisar 2018-02-22 10:10:07 EST

Is this the upstream bug report <http://lists.gnu.org/archive/html/bug-gnu-utils/2018-02/msg00004.html>? (The same author send another bug report sooner <http://lists.gnu.org/archive/html/bug-gnu-utils/2018-02/msg00003.html>.)

Comment 3 Petr Pisar 2018-02-22 11:04 EST

Created attachment 1399466 [details]
A proposed fix

Comment 4 Petr Pisar 2018-02-22 11:06:51 EST

(In reply to Petr Pisar from comment #2)
> Is this this upstream bug report
> <http://lists.gnu.org/archive/html/bug-gnu-utils/2018-02/msg00004.html>?

It is according to the back trace.

Comment 5 Fedora Update System 2018-03-06 12:23:18 EST

sharutils-4.15.2-8.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2018-03-06 12:29:28 EST

sharutils-4.15.2-6.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.

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