Multiple Vendor Linux Usermode Package Vulnerability

BID:1489

Info

Multiple Vendor Linux Usermode Package Vulnerability

Bugtraq ID: 1489
Class: Access Validation Error
CVE:
Remote: No
Local: Yes
Published: Jul 18 2000 12:00AM
Updated: Jul 18 2000 12:00AM
Credit: This vulnerability was made public in a Linux-Mandrake Security Advisory on July 18, 2000.
Vulnerable: Redhat usermode-1.20-1.i386.rpm
+ Redhat Linux 6.2
 Redhat SysVinit-2.74-11.i386.rpm
+ Redhat Linux 6.0
Redhat Linux 6.2 E sparc
Redhat Linux 6.2 E i386
Redhat Linux 6.2 E alpha
Redhat Linux 6.2 sparc
Redhat Linux 6.2 i386
Redhat Linux 6.2 alpha
Redhat Linux 6.1 sparc
Redhat Linux 6.1 i386
Redhat Linux 6.1 alpha
Redhat Linux 6.0 alpha
Redhat Linux 6.0
Mandriva Linux Mandrake 9.0
Mandriva Linux Mandrake 8.2 ppc
Mandriva Linux Mandrake 8.2
Mandriva Linux Mandrake 8.1 ia64
Mandriva Linux Mandrake 8.1
Mandriva Linux Mandrake 7.1
MandrakeSoft Multi Network Firewall 2.0
MandrakeSoft Corporate Server 2.1
Not Vulnerable: SuSE Linux 7.0
SuSE Linux 6.4
SuSE Linux 6.3
SuSE Linux 6.2
SuSE Linux 6.1
SuSE Linux 6.0
SuSE Linux 5.3
SuSE Linux 5.2
SuSE Linux 5.1
SuSE Linux 5.0
SuSE Linux 4.4.1
SuSE Linux 4.4
SuSE Linux 4.3
SuSE Linux 4.2

Discussion

Multiple Vendor Linux Usermode Package Vulnerability

A vulnerability exists in the usermode package shipped with various Linux distributions. It has been discovered that proper authentication does not occur when a local user invokes the 'shutdown' utility to enter 'single user' mode. Once 'single user' mode has been entered, the unauthorized user will have gained root privileges.

Exploit / POC

Multiple Vendor Linux Usermode Package Vulnerability

This issue can be exploited by calling 'shutdown now'.

Solution / Fix

Multiple Vendor Linux Usermode Package Vulnerability

Solution:
Mandrake and Red Hat have released security advisories containing updated usermode packages which address this issue.

*** It has been discovered that Mandrake 8.1 through 9.0 are affected by this issue. Mandrake has released a security advisory (MDKSA-2003:031) which contains updated usermode packages. It should be noted that the shutdown utility has been removed.


Redhat usermode-1.20-1.i386.rpm

Redhat SysVinit-2.74-11.i386.rpm

MandrakeSoft Multi Network Firewall 2.0

MandrakeSoft Corporate Server 2.1

Redhat Linux 6.0 alpha

Redhat Linux 6.0

Redhat Linux 6.1 i386

Redhat Linux 6.1 sparc

Redhat Linux 6.1 alpha

Redhat Linux 6.2 alpha

Redhat Linux 6.2 E alpha

Redhat Linux 6.2 i386

Redhat Linux 6.2 E i386

Redhat Linux 6.2 sparc

Redhat Linux 6.2 E sparc

Mandriva Linux Mandrake 7.1

Mandriva Linux Mandrake 8.1 ia64

Mandriva Linux Mandrake 8.1

Mandriva Linux Mandrake 8.2 ppc

Mandriva Linux Mandrake 8.2

Mandriva Linux Mandrake 9.0

References

Multiple Vendor Linux Usermode Package Vulnerability

References:
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