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Fencer Intel
low 1.2

CVE-2011-4028 json

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…

published 2012-07-03 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3981

cvss
1.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

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.

Patch / fix

  • xorg-server Debian 14, Debian 13, Debian 12 2:1.11.1.901-2

debian advisories DEBIAN-CVE-2011-4028

  • xorg-x11-server RHEL 6 1.10.6-1.el6
  • xorg-x11-server-Xdmx RHEL 6 1.10.6-1.el6
  • xorg-x11-server-Xorg RHEL 6 1.10.6-1.el6
  • xorg-x11-server-Xvfb RHEL 6 1.10.6-1.el6
  • xorg-x11-server-Xnest RHEL 6 1.10.6-1.el6
  • xorg-x11-server-common RHEL 6 1.10.6-1.el6
  • xorg-x11-server-source RHEL 6 1.10.6-1.el6
  • xorg-x11-server-Xephyr RHEL 6 1.10.6-1.el6

red hat advisories RHSA-2012:0939RHSA-2012:0303

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-4028 updated cvss 1.2

xorg-x11-server: File existence disclosure vulnerability

  • Red Hat Enterprise Linux 4 xorg-x11
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) xorg-x11-server 1.1.1-48.90.el5, xorg-x11-server-sdk 1.1.1-48.90.el5, xorg-x11-server-Xdmx 1.1.1-48.90.el5, xorg-x11-server-Xorg 1.1.1-48.90.el5, xorg-x11-server-Xvfb 1.1.1-48.90.el5, xorg-x11-server-Xnest 1.1.1-48.90.el5, +2 more Red Hat Enterprise Linux Desktop (v. 5 client) xorg-x11-server 1.1.1-48.90.el5, xorg-x11-server-Xdmx 1.1.1-48.90.el5, xorg-x11-server-Xorg 1.1.1-48.90.el5, xorg-x11-server-Xvfb 1.1.1-48.90.el5, xorg-x11-server-Xnest 1.1.1-48.90.el5, xorg-x11-server-Xephyr 1.1.1-48.90.el5, +1 more
    fixed: vendor fix RHSA-2012:0303
  • Red Hat Enterprise Linux Desktop (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xorg 1.10.6-1.el6, xorg-x11-server-common 1.10.6-1.el6, xorg-x11-server-Xephyr 1.10.6-1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xdmx 1.10.6-1.el6, xorg-x11-server-Xvfb 1.10.6-1.el6, xorg-x11-server-Xnest 1.10.6-1.el6, xorg-x11-server-source 1.10.6-1.el6
    fixed: vendor fix RHSA-2012:0939
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xorg-x11-server 1.1.1-48.90.el5, xorg-x11-server-sdk 1.1.1-48.90.el5
    fixed: vendor fix RHSA-2012:0303
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xdmx 1.10.6-1.el6, xorg-x11-server-Xorg 1.10.6-1.el6, xorg-x11-server-Xvfb 1.10.6-1.el6, xorg-x11-server-Xnest 1.10.6-1.el6, xorg-x11-server-common 1.10.6-1.el6, +2 more Red Hat Enterprise Linux Server (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xorg 1.10.6-1.el6, xorg-x11-server-common 1.10.6-1.el6, xorg-x11-server-Xephyr 1.10.6-1.el6 Red Hat Enterprise Linux Server Optional (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xdmx 1.10.6-1.el6, xorg-x11-server-Xvfb 1.10.6-1.el6, xorg-x11-server-Xnest 1.10.6-1.el6, xorg-x11-server-source 1.10.6-1.el6 Red Hat Enterprise Linux Workstation (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xorg 1.10.6-1.el6, xorg-x11-server-common 1.10.6-1.el6, xorg-x11-server-Xephyr 1.10.6-1.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) xorg-x11-server 1.10.6-1.el6, xorg-x11-server-Xdmx 1.10.6-1.el6, xorg-x11-server-Xvfb 1.10.6-1.el6, xorg-x11-server-Xnest 1.10.6-1.el6, xorg-x11-server-source 1.10.6-1.el6
    fixed: vendor fix RHSA-2012:0939

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 1.2 AV:L/AC:H/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.