Xinetd Rejected Connection Memory Leakage Denial Of Service Vulnerability

BID:7382

Info

Xinetd Rejected Connection Memory Leakage Denial Of Service Vulnerability

Bugtraq ID: 7382
Class: Design Error
CVE: CVE-2003-0211
Remote: Yes
Local: No
Published: Apr 18 2003 12:00AM
Updated: Jul 11 2009 09:07PM
Credit: Discovery of this vulnerability credited to Steve Grubb <[email protected]>.
Vulnerable: Xinetd Xinetd 2.3.10
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ Terra Soft Solutions Yellow Dog Linux 3.0
Xinetd Xinetd 2.3.9
Xinetd Xinetd 2.3.8
Xinetd Xinetd 2.3.7
+ Mandriva Linux Mandrake 9.0
Xinetd Xinetd 2.3.6
+ MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
Xinetd Xinetd 2.3.5
+ Gentoo Linux 0.7
+ Gentoo Linux 0.5
Xinetd Xinetd 2.3.4
Xinetd Xinetd 2.3.3
Xinetd Xinetd 2.3.2
Xinetd Xinetd 2.3.1
Xinetd Xinetd 2.3
+ Immunix Immunix OS 7.0
Xinetd Xinetd 2.1.8 .9pre15
+ Immunix Immunix OS 7.0 beta
 + Immunix Immunix OS 7.0
Xinetd Xinetd 2.1.8 .9pre14
+ Mandriva Linux Mandrake 8.0
+ Redhat Linux 7.1
Xinetd Xinetd 2.1.8 .9pre13
Xinetd Xinetd 2.1.8 .9pre12
+ MandrakeSoft Single Network Firewall 7.2
+ Mandriva Linux Mandrake 7.2
Sun Linux 5.0.5
Redhat xinetd-2.3.7-2.i386.rpm
+ Redhat Linux 8.0
Redhat xinetd-2.3.4-0.8.i386.rpm
+ Redhat Linux 7.3
Redhat xinetd-2.3.3-1.ia64.rpm
+ Redhat Linux 7.2 ia64
 Redhat xinetd-2.3.3-1.i386.rpm
+ Redhat Linux 7.2 i386
 Redhat xinetd-2.3.10-6.i386.rpm
+ Redhat Linux 9.0 i386
 Redhat xinetd-2.1.8.9pre9-6.i386.rpm
+ Redhat Linux 7.0
Redhat xinetd-2.1.8.9pre14-6.i386.rpm
+ Redhat Linux 7.1
Not Vulnerable: Xinetd Xinetd 2.3.11

Discussion

Xinetd Rejected Connection Memory Leakage Denial Of Service Vulnerability

A denial of service vulnerability has been reported for Xinetd. The vulnerability exists due to memory leaks occuring when connections are rejected.

Numerous, repeated connections to a vulnerable Xinetd server will result in the consumption of all available memory resources thereby causing a denial of service condition.

Exploit / POC

Xinetd Rejected Connection Memory Leakage Denial Of Service Vulnerability

The following proof of concept was provided:

while true; do telnet localhost chargen &lt; /dev/null; done;

Solution / Fix

Xinetd Rejected Connection Memory Leakage Denial Of Service Vulnerability

Solution:
Sun has released updates for Sun Linux 5.0.5.

Red Hat has released a security advisory (RHSA-2003:160-01) containing fixes to address this issue. Users are advised to upgrade as soon as possible. Red Hat has also released an advisory (RHSA-2003:161-07) which contains upgrade details for Enterprise distributions, which are available through the Red Hat Network.

Conectiva has released an advisory CLA-2003:782 to address this issue. Please see the referenced advisory for detailed information about obtaining fixes.

Conectiva has also released an advisory (CLSA-2003:790) including a fix to address this issue in CLEE 1.0.

Fixes available:


Redhat xinetd-2.3.7-2.i386.rpm

Redhat xinetd-2.1.8.9pre14-6.i386.rpm

Redhat xinetd-2.3.4-0.8.i386.rpm

Redhat xinetd-2.3.3-1.i386.rpm

Redhat xinetd-2.3.3-1.ia64.rpm

Redhat xinetd-2.3.10-6.i386.rpm

Xinetd Xinetd 2.1.8 .9pre12

Xinetd Xinetd 2.3

Xinetd Xinetd 2.3.1

Xinetd Xinetd 2.3.10

Xinetd Xinetd 2.3.2

Xinetd Xinetd 2.3.3

Xinetd Xinetd 2.3.4

Xinetd Xinetd 2.3.5

Xinetd Xinetd 2.3.6

Xinetd Xinetd 2.3.7

Xinetd Xinetd 2.3.8

Xinetd Xinetd 2.3.9

Sun Linux 5.0.5

References

Xinetd Rejected Connection Memory Leakage Denial Of Service Vulnerability

References:

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