The following security advisory is sent to the securiteam mailing list, and can
be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion
The SecuriTeam alerts list - Free, Accurate, Independent.
Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html
- - - - - - - - -
Skype Linux Insecure Temporary File Creation
------------------------------------------------------------------------
SUMMARY
<http://www.skype.com> Skype is "a free program that uses the latest P2P
technology to bring affordable and high-quality voice communications to
people all over the world. It also provides a service of Instant
Messaging".
Skype creates a temporary file in an insecure way when it adds picture for
user profile, exploiting this may allow local attackers to preform symlink
attacks.
DETAILS
Vulnerable Systems:
* Skype for Linux versions 1.1.0.20 and prior
Each user has his own profile which can be personalized with a picture.
When a user adds a picture for his profile, Skype creates in /tmp
directory a file named "skype_profile.jpg" in an insecure manner, without
checking if the file already exists and if it's a symbolic link.
bad at badpenguin:~/skype-1.1.0.20$ strace -e trace=open skype
========================================
This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to:
list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to:
list-subscribe@securiteam.com
====================
====================
DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any
kind.
In no event shall we be liable for any damages whatsoever including direct,
indirect, incidental, consequential, loss of business profits or special
damages.
