CVE-2011-4028 Path traversal in n/a

Low 1.2 Published Updated

Local attackers can determine the existence of arbitrary files via a symlink attack on a temporary lock file in the X.Org server.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Local or same network only
Victim action needed
Not needed
Fix
Available

What is CVE-2011-4028?

CVE-2011-4028 is a low-severity path traversal vulnerability in X.org X Server, published on 3 Jul 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The LockServer function in os/utils.c in X.Org xserver before 1.11.2 allows local users to determine the existence of arbitrary files via a symlink attack on a temporary lock file, which is handled differently if the file exists.

Weakness: CWE-59

Which versions are affected by CVE-2011-4028?

It affects 1 product.

Linux distribution packages (20)
xorg-x11-server Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xdmx Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xephyr Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xnest Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xorg Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xvfb Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xvnc-source Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server-debuginfo Red Hat:enterprise_linux:5::clientAll versions0:1.1.1-48.90.el5
xorg-x11-server Red Hat:enterprise_linux:5::client_workstationAll versions0:1.1.1-48.90.el5
xorg-x11-server-debuginfo Red Hat:enterprise_linux:5::client_workstationAll versions0:1.1.1-48.90.el5
xorg-x11-server-sdk Red Hat:enterprise_linux:5::client_workstationAll versions0:1.1.1-48.90.el5
xorg-x11-server Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xdmx Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xephyr Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xnest Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xorg Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xvfb Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-Xvnc-source Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5
xorg-x11-server-sdk Red Hat:enterprise_linux:5::serverAll versions0:1.1.1-48.90.el5

Products include X.org X Server.

How do I fix CVE-2011-4028?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2011-4028 being exploited?

There is no known exploitation of CVE-2011-4028 in the wild and no public exploit code.

All X.org X Server vulnerabilities

Sources

Also known as DEBIAN-CVE-2011-4028, GHSA-43jf-fxqp-3qf7, RHSA-2012:0303.

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