The Ubunto installer contains a flaw that may lead to an unauthorized password exposure. The installer log files fail to sanitize passwords used during the installation. The installer log files are world-readable, thus any local user can see the password of the first user account, which has full sudo privileges by default, thus leading to a loss of confidentiality.
Classification
Location:
Local Access Required
Attack Type:
Cryptographic,
Information Disclosure
Impact:
Loss of Confidentiality
Exploit:
Exploit Public,
Exploit Commercial
Disclosure:
OSVDB Verified
Solution
Upgrade package base-config to version 2.67ubuntu20 and passwd to version 1:4.0.3-37ubuntu8 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.