Smb4K: Multiple vulnerabilities

Security Team Contact Address

Updated March 09, 2007

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200703-09 / smb4k
Release Date	March 09, 2007
Latest Revision	March 09, 2007: 01
Impact	high
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/smb4k	< 0.6.10a	>= 0.6.10a	All supported architectures

Related bugreports: #156152

Synopsis

Multiple vulnerabilities have been identified in Smb4K.

2. Impact Information

Background

Smb4K is a SMB/CIFS (Windows) share browser for KDE.

Description

Kees Cook of the Ubuntu Security Team has identified multiple vulnerabilities in Smb4K.

The writeFile() function of smb4k/core/smb4kfileio.cpp makes insecure usage of temporary files.
The writeFile() function also stores the contents of the sudoers file with incorrect permissions, allowing for the file's contents to be world-readable.
The createLockFile() and removeLockFile() functions improperly handle lock files, possibly allowing for a race condition in file handling.
The smb4k_kill utility distributed with Smb4K allows any user in the sudoers group to kill any process on the system.
Lastly, there is the potential for multiple stack overflows when any Smb4K utility is used with the sudo command.

Impact

A local attacker could gain unauthorized access to arbitrary files via numerous attack vectors. In some cases to obtain this unauthorized access, an attacker would have to be a member of the sudoers list.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Smb4K users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/smb4k-0.6.10a"

4. References