Xfce: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200801-06 / xfce4-panel libxfcegui4
Release Date	January 09, 2008
Latest Revision	January 10, 2008: 03
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
xfce-base/xfce4-panel	< 4.4.2	>= 4.4.2	All supported architectures
xfce-base/libxfcegui4	< 4.4.2	>= 4.4.2	All supported architectures

Related bugreports: #201292, #201293

Synopsis

Multiple vulnerabilities in Xfce might allow user-assisted attackers to execute arbitrary code.

2. Impact Information

Background

Xfce is a GTK+ 2 based desktop environment that allows to run a modern desktop environment on modest hardware.

Description

Gregory Andersen reported that the Xfce4 panel does not correctly calculate memory boundaries, leading to a stack-based buffer overflow in the launcher_update_panel_entry() function (CVE-2007-6531). Daichi Kawahata reported libxfcegui4 did not copy provided values when creating "SessionClient" structs, possibly leading to access of freed memory areas (CVE-2007-6532).

Impact

A remote attacker could entice a user to install a specially crafted "rc" file to execute arbitrary code via long strings in the "Name" and "Comment" fields or via unspecified vectors involving the second vulnerability.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Xfce4 panel users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=xfce-base/xfce4-panel-4.4.2"

All libxfcegui4 users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=xfce-base/libxfcegui4-4.4.2"

4. References

Page updated January 09, 2008

Summary: This is a Gentoo Linux Security Advisory

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