X.Org X Server: Multiple vulnerabilities
1.
Gentoo Linux Security Advisory
Version Information
| Advisory Reference |
GLSA 201110-19 / xorg-server |
| Release Date |
October 22, 2011 |
| Latest Revision |
October 22, 2011: 2 |
| Impact |
normal |
| Exploitable |
local |
| Package |
Vulnerable versions |
Unaffected versions |
Architecture(s) |
| x11-base/xorg-server |
<
1.10.4-r1 |
revision >=
1.9.5-r1,
>=
1.10.4-r1 |
All supported architectures
|
Related bugreports:
#387069
Synopsis
Multiple vulnerabilities in the X.Org X server might allow local
attackers to disclose information.
2.
Impact Information
Background
The X Window System is a graphical windowing system based on a
client/server model.
Description
vladz reported the following vulnerabilities in the X.Org X server:
- The X.Org X server follows symbolic links when trying to access the
lock file for a X display, showing a predictable behavior depending on
the file type of the link target (CVE-2011-4028).
- The X.Org X server lock file mechanism allows for a race condition to
cause the X server to modify the file permissions of an arbitrary file
to 0444 (CVE-2011-4029).
Impact
A local attacker could exploit these vulnerabilities to disclose
information by making arbitrary files on a system world-readable or gain
information whether a specified file exists on the system and whether it
is a file, directory, or a named pipe.
3.
Resolution Information
Workaround
There is no known workaround at this time.
Resolution
All X.Org X Server 1.9 users should upgrade to the latest 1.9 version:
Code Listing 3.1: Resolution |
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.9.5-r1"
|
All X.Org X Server 1.10 users should upgrade to the latest version:
Code Listing 3.2: Resolution |
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.10.4-r1"
|
4.
References
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