Bug 98328 – CAN-2003-0282 vulnerability in unzip 5.50 allows malicious zip file to write to ../

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 98328 - CAN-2003-0282 vulnerability in unzip 5.50 allows malicious zip file to write to ../

Summary:	CAN-2003-0282 vulnerability in unzip 5.50 allows malicious zip file to write...

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 2.1
Classification:	Red Hat
Component:	unzip (Show other bugs)
Sub Component:
Version:	2.1
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Lon Hohberger
QA Contact:	Ben Levenson
Docs Contact:

URL:
Whiteboard:
Keywords:	Security

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2003-07-01 04:47 EDT by Mark J. Cox
Modified:	2007-11-30 17:06 EST (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2003-07-01 11:24:27 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2003:200	low	SHIPPED_LIVE	Moderate: unzip security update	2003-07-01 00:00:00 EDT

Groups: None (edit)

Description Mark J. Cox 2003-07-01 04:47:18 EDT

Description of problem:
By inserting non-printable characters into a directory, for instance:

^C../

One may create a zip file which, when extracted, will bypass the "writing to
../" security check (if the user has not specified the "-:" command line
option), thus opening up the potential for a trojan horse program:

^C../^C../^C../^C../usr/sbin/sshd

for example.

Version-Release number of selected component (if applicable):
5.50-*

How reproducible:
Always

Steps to Reproduce: Unzip the attached testcase.zip.
Actual Results:  Stuff created in parent directory (../) without the -: option.
Expected Results:  Stuff created in current directory.

Comment 1 Lon Hohberger 2003-07-01 10:48:27 EDT

Awaiting erratum.

Comment 2 Mark J. Cox 2003-07-01 11:24:27 EDT

An errata has been issued which should help the problem described in this bug report. 
This report is therefore being closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, please follow the link below. You may reopen 
this bug report if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2003-200.html

Note You need to log in before you can comment on or make changes to this bug.