Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Sun, 25 Jan 2015 22:40:33 -0700
From: Kurt Seifried <kseifried@...hat.com>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>,
        Assign a CVE Identifier <cve-assign@...re.org>
Subject: unshield directory traversal

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=776193

Package: unshield
Version: 1.0-1
Tags: security

unshield is vulnerable to directory traversal via "../" sequences. As a
proof of concept, unpacking the attached InstallShield archive creates a
file in /tmp:

$ ls /tmp/moo
ls: cannot access /tmp/moo: No such file or directory

$ unshield x data1.cab
Cabinet: data1.cab
 extracting:
./Bovine_Files/../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../tmp/moo
--------  -------
         1 files

$ ls /tmp/moo
/tmp/moo


-- System Information:
Debian Release: 8.0
 APT prefers unstable
 APT policy: (990, 'unstable'), (500, 'experimental')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages unshield depends on:
ii  libc6         2.19-13
ii  libunshield0  1.0-1
ii  zlib1g        1:1.2.8.dfsg-2+b1

-- 
Kurt Seifried -- Red Hat -- Product Security -- Cloud
PGP A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993


Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.