Apache Mod_DAV LOCK Denial Of Service Vulnerability

BID:11185

Info

Apache Mod_DAV LOCK Denial Of Service Vulnerability

Bugtraq ID: 11185
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2004-0809
Remote: Yes
Local: No
Published: Sep 15 2004 12:00AM
Updated: Jul 12 2009 07:06AM
Credit: Julian Reschke <[email protected]> reported this vulnerability to the vendor.
Vulnerable: Turbolinux Turbolinux Server 10.0
Turbolinux Turbolinux Desktop 10.0
Turbolinux Home
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Trustix Secure Enterprise Linux 2.0
Redhat Enterprise Linux WS 3
Redhat Enterprise Linux ES 3
Redhat Enterprise Linux AS 3
Redhat Desktop 3.0
IBM HTTP Server 2.0.47 .1
IBM HTTP Server 2.0.47
IBM HTTP Server 2.0.42 .2
IBM HTTP Server 2.0.42 .1
IBM HTTP Server 2.0.42
HP HP-UX B.11.23
HP HP-UX B.11.22
HP HP-UX B.11.11
HP HP-UX B.11.00
Gentoo Linux 1.4
Debian Linux 3.0 sparc
Debian Linux 3.0 s/390
Debian Linux 3.0 ppc
Debian Linux 3.0 mipsel
Debian Linux 3.0 mips
Debian Linux 3.0 m68k
Debian Linux 3.0 ia-64
Debian Linux 3.0 ia-32
Debian Linux 3.0 hppa
Debian Linux 3.0 arm
Debian Linux 3.0 alpha
Apache Apache 2.0.50
+ Mandriva Linux Mandrake 10.1 x86_64
 + Mandriva Linux Mandrake 10.1
Apache Apache 2.0.49
+ S.u.S.E. Linux Personal 9.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Apache Apache 2.0.48
+ Mandriva Linux Mandrake 10.0 AMD64
 + Mandriva Linux Mandrake 10.0
+ S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
+ S.u.S.E. Linux Personal 8.2
+ SuSE Linux 8.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Apache Apache 2.0.47
+ Apple Mac OS X Server 10.3.5
+ Apple Mac OS X Server 10.3.4
+ Apple Mac OS X Server 10.3.3
+ Apple Mac OS X Server 10.3.2
+ Apple Mac OS X Server 10.3.1
+ Apple Mac OS X Server 10.3
+ Apple Mac OS X Server 10.2.8
+ Apple Mac OS X Server 10.2.7
+ Apple Mac OS X Server 10.2.6
+ Apple Mac OS X Server 10.2.5
+ Apple Mac OS X Server 10.2.4
+ Apple Mac OS X Server 10.2.3
+ Apple Mac OS X Server 10.2.2
+ Apple Mac OS X Server 10.2.1
+ Apple Mac OS X Server 10.2
+ Apple Mac OS X Server 10.1.5
+ Apple Mac OS X Server 10.1.4
+ Apple Mac OS X Server 10.1.3
+ Apple Mac OS X Server 10.1.2
+ Apple Mac OS X Server 10.1.1
+ Apple Mac OS X Server 10.1
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
Apache Apache 2.0.46
+ Redhat Desktop 3.0
+ Redhat Enterprise Linux AS 3
 + Redhat Enterprise Linux ES 3
 + Redhat Enterprise Linux WS 3
 + Trustix Secure Linux 2.0
Apache Apache 2.0.45
- Apple Mac OS X 10.2.6
- Apple Mac OS X 10.2.5
- Apple Mac OS X 10.2.4
- Apple Mac OS X 10.2.3
- Apple Mac OS X 10.2.2
- Apple Mac OS X 10.2.1
- Apple Mac OS X 10.2
- Apple Mac OS X 10.1.5
- Apple Mac OS X 10.1.4
- Apple Mac OS X 10.1.3
- Apple Mac OS X 10.1.2
- Apple Mac OS X 10.1.1
- Apple Mac OS X 10.1
- Apple Mac OS X 10.1
- Apple Mac OS X 10.0.4
- Apple Mac OS X 10.0.3
- Apple Mac OS X 10.0.2
- Apple Mac OS X 10.0.1
- Apple Mac OS X 10.0
Apache Apache 2.0.44
Apache Apache 2.0.43
Apache Apache 2.0.42
+ Gentoo Linux 1.4 _rc1
 + Gentoo Linux 1.2
Apache Apache 2.0.41
Apache Apache 2.0.40
+ Redhat Linux 9.0 i386
 + Redhat Linux 8.0
+ Terra Soft Solutions Yellow Dog Linux 3.0
Apache Apache 2.0.39
Apache Apache 2.0.38
Apache Apache 2.0.37
Apache Apache 2.0.36
Apache Apache 2.0.35
Apache Apache 2.0.32
Apache Apache 2.0.28 Beta
Apache Apache 2.0.28
Apache Apache 2.0 a9
Apache Apache 2.0
Not Vulnerable: Apache Apache 2.0.51
+ Redhat Fedora Core2
 + Redhat Fedora Core1

Discussion

Apache Mod_DAV LOCK Denial Of Service Vulnerability

Apache's 'mod_dav' module is reported susceptible to a denial of service vulnerability.

This vulnerability presents itself when Apache is configured to use the 'mod_dav' module, and it receives a specific sequence of LOCK commands from an authorized user.

This vulnerability can be exploited by remote attackers to crash Apache processes. If Apache is configured to use the threaded process model, an attacker could completely crash Apache. If Apache is configured to use multiple processes as apposed to threads, an attacker could crash individual web server processes. With a sustained attack, they could crash multiple server processes, and still likely deny service to legitimate users.

All versions of Apache 2.0, prior to 2.0.51 are reported vulnerable.

Exploit / POC

Apache Mod_DAV LOCK Denial Of Service Vulnerability

An exploit is not required. The reporter of this issue provided an example sequence of DAV commands sufficient to exploit this vulnerability:

MKCOL x
PUT x/y
LOCK x
LOCK x/y

Solution / Fix

Apache Mod_DAV LOCK Denial Of Service Vulnerability

Solution:
Turbolinux has released advisory TLSA-2005-01-13 along with fixes dealing with this and other issues. Please see the referenced advisory for more information.

Debian has released advisory DSA 558-1 along with fixes to address this issue for Debian systems. Please see the referenced advisory for further information.

RedHat has released advisory RHSA-2004:463-09 along with fixes to address these issues for RedHat Enterprise Linux operating systems. Please see the referenced advisory for further information.

Trustix Secure Linux has released an advisory (TSLSA-2004-0047) along with fixes dealing with this, and other issues. Please see the referenced advisory for further information.

Gentoo Linux has released advisory GLSA 200409-21 to address this, and other issues. Please see the referenced advisory for further information. Users of affected packages are urged to execute the following with superuser privileges:
emerge sync
emerge -pv ">=net-www/apache-2.0.51"
emerge ">=net-www/apache-2.0.51"
emerge -pv ">=net-www/mod_dav-1.0.3-r2"
emerge ">=net-www/mod_dav-1.0.3-r2"

Conectiva Linux has released advisory CLA-2004:868 along with fixes to address this, and other issues. Please see the referenced advisory for further information.

Red Hat Fedora has released an advisory (FEDORA-2004-313) along with fixes dealing with this and other issues. Please see the referenced advisory for more information.

The vendor has released version 2.0.51 to address this, and other issues:

HP has released an advisory (HPSBUX01090) to address various issues affecting HP-UX running Apache and PHP. Please see the referenced advisory for more information.

IBM has released an advisory dealing with this issue for the HTTP Server based on Apache. Please see the referenced advisory for more information.


Apache Apache 2.0

Apache Apache 2.0 a9

Apache Apache 2.0.28

Apache Apache 2.0.28 Beta

Apache Apache 2.0.32

Apache Apache 2.0.35

Apache Apache 2.0.36

Apache Apache 2.0.37

Apache Apache 2.0.38

Apache Apache 2.0.39

Apache Apache 2.0.40

Apache Apache 2.0.41

IBM HTTP Server 2.0.42 .2

Apache Apache 2.0.42

Apache Apache 2.0.43

Apache Apache 2.0.44

Apache Apache 2.0.45

Apache Apache 2.0.46

Apache Apache 2.0.47

IBM HTTP Server 2.0.47 .1

Apache Apache 2.0.48

Apache Apache 2.0.49

Apache Apache 2.0.50

Debian Linux 3.0 alpha

Debian Linux 3.0 mips

Debian Linux 3.0 m68k

Debian Linux 3.0 hppa

Debian Linux 3.0 arm

Debian Linux 3.0 ia-64

Debian Linux 3.0 ia-32

References

Apache Mod_DAV LOCK Denial Of Service Vulnerability

References:

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