Linux Kernel Random Poolsize SysCTL Handler Integer Overflow Vulnerability

BID:12196

Info

Linux Kernel Random Poolsize SysCTL Handler Integer Overflow Vulnerability

Bugtraq ID: 12196
Class: Boundary Condition Error
CVE:
Remote: No
Local: Yes
Published: Jan 07 2005 12:00AM
Updated: Jan 07 2005 12:00AM
Credit: Discovery of this vulnerability is credited to Brad Spengler <[email protected]>.
Vulnerable: Redhat Fedora Core3
Redhat Fedora Core2
Linux kernel 2.6.10 rc2
Linux kernel 2.6.10
+ Redhat Fedora Core3
 + Redhat Fedora Core2
 + Trustix Secure Linux 3.0
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 Linux kernel 2.6.9
Linux kernel 2.6.8 rc3
Linux kernel 2.6.8 rc2
Linux kernel 2.6.8 rc1
+ Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 Linux kernel 2.6.8
+ S.u.S.E. Linux Personal 9.2 x86_64
 + S.u.S.E. Linux Personal 9.2
+ Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 Linux kernel 2.6.7 rc1
Linux kernel 2.6.7
Linux kernel 2.6.6 rc1
Linux kernel 2.6.6
Linux kernel 2.6.5
Linux kernel 2.6.4
Linux kernel 2.6.3
Linux kernel 2.6.2
Linux kernel 2.6.1 -rc2
Linux kernel 2.6.1 -rc1
Linux kernel 2.6.1
Linux kernel 2.6 .10
Linux kernel 2.6 -test9-CVS
Linux kernel 2.6 -test9
Linux kernel 2.6 -test8
Linux kernel 2.6 -test7
Linux kernel 2.6 -test6
Linux kernel 2.6 -test5
Linux kernel 2.6 -test4
Linux kernel 2.6 -test3
Linux kernel 2.6 -test2
Linux kernel 2.6 -test11
Linux kernel 2.6 -test10
Linux kernel 2.6 -test1
Linux kernel 2.6
Linux kernel 2.4.29 -rc2
Linux kernel 2.4.28
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Linux kernel 2.4.27 -pre5
Linux kernel 2.4.27 -pre4
Linux kernel 2.4.27 -pre3
Linux kernel 2.4.27 -pre2
Linux kernel 2.4.27 -pre1
Linux kernel 2.4.27
Linux kernel 2.4.26
Linux kernel 2.4.25
Linux kernel 2.4.24 -ow1
Linux kernel 2.4.24
Linux kernel 2.4.23 -pre9
Linux kernel 2.4.23 -ow2
Linux kernel 2.4.23
+ Trustix Secure Linux 2.0
Linux kernel 2.4.22
+ Devil-Linux Devil-Linux 1.0.5
+ Devil-Linux Devil-Linux 1.0.4
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ Redhat Fedora Core1
 + Slackware Linux 9.1
Linux kernel 2.4.21 pre7
Linux kernel 2.4.21 pre4
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
Linux kernel 2.4.21 pre1
Linux kernel 2.4.21
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ Redhat Desktop 3.0
+ Redhat Enterprise Linux AS 3
 + Redhat Enterprise Linux ES 3
 + Redhat Enterprise Linux WS 3
 + S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
+ SuSE SUSE Linux Enterprise Server 8
 Linux kernel 2.4.20
Linux kernel 2.4.19 -pre6
Linux kernel 2.4.19 -pre5
Linux kernel 2.4.19 -pre4
Linux kernel 2.4.19 -pre3
Linux kernel 2.4.19 -pre2
Linux kernel 2.4.19 -pre1
Linux kernel 2.4.19
+ Conectiva Linux Enterprise Edition 1.0
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ MandrakeSoft Multi Network Firewall 2.0
+ Mandriva Linux Mandrake 9.0
+ Slackware Linux -current
 + SuSE Linux 8.1
+ SuSE SUSE Linux Enterprise Server 8
 + SuSE SUSE Linux Enterprise Server 7
 Linux kernel 2.4.18 pre-8
Linux kernel 2.4.18 pre-7
Linux kernel 2.4.18 pre-6
Linux kernel 2.4.18 pre-5
Linux kernel 2.4.18 pre-4
Linux kernel 2.4.18 pre-3
Linux kernel 2.4.18 pre-2
Linux kernel 2.4.18 pre-1
Linux kernel 2.4.18 x86
+ Debian Linux 3.0 ia-32
 Linux kernel 2.4.18
+ Astaro Security Linux 2.0 23
 + Astaro Security Linux 2.0 16
 + 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
 + Mandriva Linux Mandrake 8.2
+ Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0
+ Redhat Advanced Workstation for the Itanium Processor 2.1 IA64
 + Redhat Advanced Workstation for the Itanium Processor 2.1
+ Redhat Enterprise Linux AS 2.1 IA64
 + Redhat Linux 8.0
+ Redhat Linux 7.3
+ S.u.S.E. Linux Connectivity Server
+ S.u.S.E. Linux Database Server 0
 + S.u.S.E. Linux Firewall on CD
+ S.u.S.E. Linux Office Server
+ S.u.S.E. Linux Personal 8.2
+ S.u.S.E. SuSE eMail Server 3.1
+ S.u.S.E. SuSE eMail Server III
+ SuSE Linux 8.1
+ SuSE Linux 8.0
+ SuSE Linux 7.3
+ SuSE Linux 7.2
+ SuSE Linux 7.1
+ SuSE Linux Openexchange Server
+ SuSE SUSE Linux Enterprise Server 8
 + SuSE SUSE Linux Enterprise Server 7
 + Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 7.0
+ Turbolinux Turbolinux Workstation 8.0
+ Turbolinux Turbolinux Workstation 7.0
Linux kernel 2.4.17
Linux kernel 2.4.16
+ Sun Cobalt RaQ 550
Linux kernel 2.4.15
Linux kernel 2.4.14
Linux kernel 2.4.13
+ Caldera OpenLinux Server 3.1.1
+ Caldera OpenLinux Workstation 3.1.1
Linux kernel 2.4.12
Linux kernel 2.4.11
Linux kernel 2.4.10
Linux kernel 2.4.9
+ Redhat Enterprise Linux AS 2.1 IA64
 + Redhat Enterprise Linux AS 2.1
 + Redhat Enterprise Linux ES 2.1 IA64
 + Redhat Enterprise Linux ES 2.1
 + Redhat Enterprise Linux WS 2.1 IA64
 + Redhat Enterprise Linux WS 2.1
 + Redhat Linux 7.2 ia64
 + Redhat Linux 7.2 i386
 + Redhat Linux 7.2 alpha
 + Redhat Linux 7.1 ia64
 + Redhat Linux 7.1 i386
 + Redhat Linux 7.1 alpha
 + Sun Linux 5.0.5
+ Sun Linux 5.0.3
+ Sun Linux 5.0
Linux kernel 2.4.8
+ Mandriva Linux Mandrake 8.2
+ Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0
Linux kernel 2.4.7
+ Redhat Linux 7.2
+ SuSE Linux 7.2
+ SuSE Linux 7.1
Linux kernel 2.4.6
Linux kernel 2.4.5
+ Slackware Linux 8.0
Linux kernel 2.4.4
+ SuSE Linux 7.2
Linux kernel 2.4.3
+ Mandriva Linux Mandrake 8.0 ppc
 + Mandriva Linux Mandrake 8.0
Linux kernel 2.4.2
Linux kernel 2.4.1
Linux kernel 2.4 .0-test9
Linux kernel 2.4 .0-test8
Linux kernel 2.4 .0-test7
Linux kernel 2.4 .0-test6
Linux kernel 2.4 .0-test5
Linux kernel 2.4 .0-test4
Linux kernel 2.4 .0-test3
Linux kernel 2.4 .0-test2
Linux kernel 2.4 .0-test12
Linux kernel 2.4 .0-test11
Linux kernel 2.4 .0-test10
Linux kernel 2.4 .0-test1
Linux kernel 2.4
Not Vulnerable:

Discussion

Linux Kernel Random Poolsize SysCTL Handler Integer Overflow Vulnerability

The Linux Kernel is reported prone to a local integer overflow vulnerability. The issue occurs in the 'poolsize_strategy' function of the 'random.c' kernel driver.

The vulnerability exists due to a lack of sufficient sanitization performed on integer values before these values are employed as the size argument of a user-land to kernel memory copy operation.

This vulnerability may be leveraged to corrupt kernel memory and ultimately execute arbitrary code with ring-0 privileges. Alternatively, the issue may be exploited to trigger a kernel panic.

It is reported that a user must have UID 0 to exploit this issue, however the user does not require superuser privileges. This may hinder exploitability.

Exploit / POC

Linux Kernel Random Poolsize SysCTL Handler Integer Overflow Vulnerability

The following proof of concept denial of service exploit is available:

Solution / Fix

Linux Kernel Random Poolsize SysCTL Handler Integer Overflow Vulnerability

Solution:
RedHat has released two advisories called FEDORA-2005-013 and FEDORA-2005-014 to address this, and other issues for Fedora Core 2 and 3. Please see the referenced advisories for further information.


Linux kernel 2.6.9

References

Linux Kernel Random Poolsize SysCTL Handler Integer Overflow Vulnerability

References:
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