GLSA 200608-25: X.org and some X.org libraries: Local privilege escalations

http://security.gentoo.org/

Severity:	high
Title:	X.org and some X.org libraries: Local privilege escalations
Date:	08/28/2006
Bugs:	#135974
ID:	200608-25

Synopsis

X.org, libX11, xdm, xf86dga, xinit, xload, xtrans, and xterm are vulnerable to local privilege escalations because of unchecked setuid() calls.

Background

X.org is an implementation of the X Window System.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
x11-apps/xdm	< 1.0.4-r1	>= 1.0.4-r1	All supported architectures
x11-apps/xinit	< 1.0.2-r6	>= 1.0.2-r6	All supported architectures
x11-apps/xload	< 1.0.1-r1	>= 1.0.1-r1	All supported architectures
x11-apps/xf86dga	< 1.0.1-r1	>= 1.0.1-r1	All supported architectures
x11-base/xorg-x11	< 6.9.0-r2	>= 6.8.2-r8	All supported architectures
x11-base/xorg-server	< 1.1.0-r1	>= 1.0.2-r6	All supported architectures
x11-libs/libx11	< 1.0.1-r1	>= 1.0.1-r1	All supported architectures
x11-libs/xtrans	< 1.0.0-r1	>= 1.0.0-r1	All supported architectures
x11-terms/xterm	< 215	>= 215	All supported architectures
app-emulation/emul-linux-x86-xlibs	< 7.0-r2	>= 7.0-r2	amd64

Description

Several X.org libraries and X.org itself contain system calls to set*uid() functions, without checking their result.

Impact

Local users could deliberately exceed their assigned resource limits and elevate their privileges after an unsuccessful set*uid() system call. This requires resource limits to be enabled on the machine.

Workaround

There is no known workaround at this time.

Resolution

All X.Org xdm users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-apps/xdm-1.0.4-r1"

All X.Org xinit users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-apps/xinit-1.0.2-r6"

All X.Org xload users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-apps/xload-1.0.1-r1"

All X.Org xf86dga users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-apps/xf86dga-1.0.1-r1"

All X.Org users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-base/xorg-x11-6.9.0-r2"

All X.Org X servers users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.1.0-r1"

All X.Org X11 library users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-libs/libx11-1.0.1-r1"

All X.Org xtrans library users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-libs/xtrans-1.0.1-r1"

All xterm users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-terms/xterm-215"

All users of the X11R6 libraries for emulation of 32bit x86 on amd64 should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-emulation/emul-linux-x86-xlibs-7.0-r2"

Please note that the fixed packages have been available for most architectures since June 30th but the GLSA release was held up waiting for the remaining architectures.

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200608-25.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.