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Vulnerability of Novell Client for Linux on OES11 SP2: privilege escalation via nwrights

Synthesis of the vulnerability 

A local attacker can use a file, with rights granted by nwrights, in order to escalate his privileges.
Impacted products: Novell Client, OES, SUSE Linux Enterprise Desktop.
Severity of this bulletin: 2/4.
Creation date: 12/05/2014.
Références of this threat: 7014932, CVE-2014-0595, SUSE-SU-2014:0847-1, VIGILANCE-VUL-14721.

Description of the vulnerability 

The /opt/novell/ncl/bin/nwrights command is provided with Novell Client for Linux. It defines rights on files.

However, on OES11 SP2, the 'S' (Supervisor) right is automatically granted when the user sets the 'F' (File system) right.

A local attacker can therefore use a file, with rights granted by nwrights, in order to escalate his privileges.
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This computer threat note impacts software or systems such as Novell Client, OES, SUSE Linux Enterprise Desktop.

Our Vigil@nce team determined that the severity of this weakness alert is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer weakness note.

Solutions for this threat 

Novell Client for Linux: patch April 2014 OES11SP2 Hot Patch for NCL.
The "April 2014 OES11SP2 Hot Patch for NCL" is available:
  http://www.novell.com/support/

SUSE LE 11: new novell-qtgui, novell-ui-base packages.
New packages are available:
  SUSE LE 11: novell-qtgui 3.0.0-0.20.1, novell-ui-base 3.0.0-0.10.1
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