Specially crafted webdav request allows reading of local files on liferay 6.0.x

[Jelmer Kuperus <jelmer.advisories@xxxxxxxxx>]

Specially crafted webdav request allows reading of local files on liferay 6.0.x

Description:

Liferay Portal is an enterprise portal written in Java

By creating a specially crafted webdav request that contains an
external entity it is possible to read files from a liferay server.
and echo these back in the response.  You could use this for instance
to download configuration files containing database passwords or ssh
keys located in a users home folder

Proof of concept:

Code demonstrating the vulnerability can be found at

https://github.com/jelmerk/LPS-24562-proof

Systems affected:

Liferay 6.0.5 ce is confirmed to be vulnerable
Liferay 6.0.6 ce is confirmed to be vulnerable

Vendor status :

Liferay  was notified januari 2 2012 by filing a bug in their public
bugtracker under issue number LPS-24562. The issue has since been
flagged as private and has been resolved.