GNOME esound Unix Domain Socket Race Condition Vulnerability

Bugtraq ID:	1659
Class:	Race Condition Error
CVE:
Remote:	No
Local:	Yes
Published:	Aug 31 2000 12:00AM
Updated:	Aug 31 2000 12:00AM
Credit:	This vulnerability was disclosed in a FreeBSD Security Advisory dated August 31, 2000.
Vulnerable:	GNOME esound 0.2.19 - FreeBSD FreeBSD 4.0 - FreeBSD FreeBSD 3.5 + GNOME Gnome 1.2 + GNOME Gnome 1.1
Not Vulnerable:

GNOME esound Unix Domain Socket Race Condition Vulnerability

EsounD, part of the GNOME desktop environment, is a server process allowing several applications to share the same sound hardware.

Versions of esound up to and including 0.2.19 create a world-writable directory (/tmp/.esd) which is also used to store a domain socket used by esound.

The unix domain socket is also created world-writeable. A race condition exists when this socket is created such that if an attacker creates a symbolic link in the world-writeable /tmp/.esd directory at the right time, the file pointed to by it will be changed to a world-writeable mode. The target file, of course, would have to be owned by the user running ESound. This vulnerability may have to do with a lack of checking return values when binding the address structure to the domain socket before setting permissions on the file, but this is uncomfirmed as are the exact technical details of this vulnerability.

GNOME esound Unix Domain Socket Race Condition Vulnerability

Kris Kennaway <[email protected]> has provided the following exploit: http://www.securityfocus.com/data/vulnerabilities/exploits/esd2.c

GNOME esound Unix Domain Socket Race Condition Vulnerability

Solution:
Fixes have been made available for the FreeBSD port of esound. These are available at:

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/audio/esound-0.2.19.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/audio/esound-0.2.19.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/audio/esound-0.2.19.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/audio/esound-0.2.19.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/audio/esound-0.2.19.tgz

Red Hat Linux 6.x:

alpha:
ftp://updates.redhat.com/6.2/alpha/esound-0.2.20-0.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/esound-devel-0.2.20-0.alpha.rpm

sparc:
ftp://updates.redhat.com/6.2/sparc/esound-0.2.20-0.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/esound-devel-0.2.20-0.sparc.rpm

i386:
ftp://updates.redhat.com/6.2/i386/esound-0.2.20-0.i386.rpm
ftp://updates.redhat.com/6.2/i386/esound-devel-0.2.20-0.i386.rpm

sources:
ftp://updates.redhat.com/6.2/SRPMS/esound-0.2.20-0.src.rpm

Red Hat Linux 7.0:

i386:
ftp://updates.redhat.com/7.0/i386/esound-0.2.20-1.i386.rpm
ftp://updates.redhat.com/7.0/i386/esound-devel-0.2.20-1.i386.rpm

sources:
ftp://updates.redhat.com/7.0/SRPMS/esound-0.2.20-1.src.rpm

Immunix OS 6.2 Updates:

http://www.immunix.org:8080/ImmunixOS/6.2/updates/RPMS/esound-0.2.20-0_StackGuard.i386.rpm
http://www.immunix.org:8080/ImmunixOS/6.2/updates/RPMS/esound-devel-0.2.20-0_StackGuard.i386.rpm

SuSE Updates:

i386 Intel Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/i386/update/7.0/snd1/esound-0.2.19-15.i386.rpm
9d8addaa5ba29554a727eb34ae5189f4
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/esound-0.2.19-15.src.rpm
a9724b99a96430b1b7c1f741a8e8d528

SuSE-6.4
ftp://ftp.suse.com/pub/suse/i386/update/6.4/snd1/esound-0.2.16-75.i386.rpm
6f32f0867d1597a5129d0516438d9cca
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/esound-0.2.16-75.src.rpm
94ca6842981f7a501300d9edfc5cbf73

SuSE-6.3
ftp://ftp.suse.com/pub/suse/i386/update/6.3/snd1/esound-0.2.15-21.i386.rpm
16a5804a2f27e62d73df40d206b047ca
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/esound-0.2.15-21.src.rpm
c86689fd5d9f719135e1263dd5a38832

Sparc Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/sparc/update/7.0/snd1/esound-0.2.19-15.sparc.rpm
112648ef64c351952f832b180fcca23c
source rpm:
ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/esound-0.2.19-15.src.rpm
a0bb3e3517ca83c13abd6827a8d2295e

AXP Alpha Platform:

SuSE-6.4
ftp://ftp.suse.com/pub/suse/axp/update/6.4/snd1/esound-0.2.16-75.alpha.rpm
d2efefb21a6424a81e63788d972db49d
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/esound-0.2.16-75.src.rpm
a69ebae320c6f118f4b9e07f2a9af4d2

SuSE-6.3
ftp://ftp.suse.com/pub/suse/axp/update/6.3/snd1/esound-0.2.15-21.alpha.rpm
19942e308eda0c0d505bb64da734ad8d
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/esound-0.2.15-21.src.rpm
6f337d6864111d27fa93ef2bc3cb7b5a

PPC Power PC Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/ppc/update/7.0/snd1/esound-0.2.19-16.ppc.rpm
be6daabfee0e7e629b848814be81d9d0
source rpm:
ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/esound-0.2.19-16.src.rpm
c77475b2c8fff104f8662bb9179efb64

SuSE-6.4
ftp://ftp.suse.com/pub/suse/ppc/update/6.4/snd1/esound-0.2.16-75.ppc.rpm
f0e1aa54c3fdf7c6c02b34bedc51ee0f
source rpm:
ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/esound-0.2.16-75.src.rpm
9acd25b5521201386bb73bc707382646

GNOME esound Unix Domain Socket Race Condition Vulnerability

References:

• GNOME Homepage (GNOME)