Bug 156269

Summary: CAN-2005-1228 directory traversal bug
Product: [Fedora] Fedora Reporter: Josh Bressers <bressers>
Component: gzipAssignee: Ivana Varekova <varekova>
Status: CLOSED RAWHIDE QA Contact: Ben Levenson <benl>
Severity: low Docs Contact:
Priority: medium    
Version: 3Keywords: Security
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OS: Linux   
Whiteboard: impact=low,public=20050418,reported=20050422,source=cve
Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2005-05-03 10:11:28 UTC Type: ---
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Used patch. none

Description Josh Bressers 2005-04-28 15:47:00 UTC 
+++ This bug was initially created as a clone of Bug #156266 +++

A directory traversal bug exists in multiple versions of gzip. When
compressing a file, gzip saves its original name but not its path inside
the compressed file. When using gunzip's "-N" option, the original name
found inside the compressed file will be used as the name to save the
decompressed file with. "gunzip -N" doesn't check if the original name inside
the compressed file has any "/" characters in it. This makes it possible to
create a malicious compressed file that when decompressed with "gunzip -N"
will create a file at an arbitrary location in the file system.

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=305255
Comment 1 Ivana Varekova 2005-04-29 13:47:44 UTC 
Created attachment 113840 [details]
Used patch.

I used Ulf Harnhammar.
I fixed this problem in devel (gzip-1.3.5-5). 
(Gunzip remove any directory prefix if you use -N and in compressed input file
contain name with "/" characters.)

Ivana Varekova