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Home » Hacking News » Debian DSA 344-2: unzip directory traversal

Debian DSA 344-2: unzip directory traversal

by Nikola Strahija on August 26th, 2003 A directory traversal vulnerability in UnZip 5.50 allows attackers to bypass a check for relative pathnames ("../") by placing certain invalid characters between the two "." characters.


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Debian Security Advisory DSA 344-2 [email protected]
http://www.debian.org/security/ Matt Zimmerman
August 26th, 2003 http://www.debian.org/security/faq
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Package : unzip
Vulnerability : directory traversal
Problem-Type : local
Debian-specific: no
CVE Ids : CAN-2003-0282

A directory traversal vulnerability in UnZip 5.50 allows attackers to
bypass a check for relative pathnames ("../") by placing certain invalid
characters between the two "." characters. The fix which was
implemented in DSA-344-1 may not have protected against all methods of
exploiting this vulnerability.

For the stable distribution (woody) this problem has been fixed in
version 5.50-1woody2.

For the unstable distribution (sid) this problem has been fixed in
version 5.50-3.

We recommend that you update your unzip package.

Upgrade Instructions
- --------------------

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 3.0 alias woody
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Source archives:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2.dsc
Size/MD5 checksum: 571 357a3df0f8b5db02ece036643391dcff
http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2.diff.gz
Size/MD5 checksum: 5049 33fde5244d8309bc768ddc3a0b4e2f94
http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50.orig.tar.gz
Size/MD5 checksum: 1068379 6d27bcdf9b51d0ad0f78161d0f99582e

Alpha architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_alpha.deb
Size/MD5 checksum: 160152 de975e2f34dfb01474a50684330a42a3

ARM architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_arm.deb
Size/MD5 checksum: 139214 9d2c2b9ed700e0eb7ecefec83cca6ab9

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_i386.deb
Size/MD5 checksum: 122516 6276a9184819b15202548cc0d256ea5b

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_ia64.deb
Size/MD5 checksum: 190682 698db8f4c479b0ac4bd36be80bbb6e57

HP Precision architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_hppa.deb
Size/MD5 checksum: 146718 2a256d26b91722e8a61f2abc2749770c

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_m68k.deb
Size/MD5 checksum: 119336 c41cb95920762fd9a7da4ba51663cc48

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_mips.deb
Size/MD5 checksum: 142810 69570ffd84f2388b62875d5167250fe4

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_mipsel.deb
Size/MD5 checksum: 143294 921f33ce8514a2734475bf83de949adf

PowerPC architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_powerpc.deb
Size/MD5 checksum: 136226 0a28157fa0fbee952ac7751338831f7d

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_s390.deb
Size/MD5 checksum: 136788 d3cc767b0564ab5eb9b7157dd0373d45

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/u/unzip/unzip_5.50-1woody2_sparc.deb
Size/MD5 checksum: 147282 68f85c2ff2340a0e5f9015718f975539

These files will probably be moved into the stable distribution on
its next revision.

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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: [email protected]
Package info: `apt-cache show ' and http://packages.debian.org/
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