BID:13526

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

Info

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

Bugtraq ID:	13526
Class:	Design Error
CVE:	CVE-2005-1406
Remote:	No
Local:	Yes
Published:	May 06 2005 12:00AM
Updated:	Jul 12 2009 02:06PM
Credit:	The vendor disclosed these vulnerabilities.
Vulnerable:	FreeBSD FreeBSD 5.4 -PRERELEASE FreeBSD FreeBSD 5.3 -STABLE FreeBSD FreeBSD 5.3 -RELENG FreeBSD FreeBSD 5.3 -RELEASE FreeBSD FreeBSD 5.3 FreeBSD FreeBSD 5.2.1 -RELEASE FreeBSD FreeBSD 5.2 -RELENG FreeBSD FreeBSD 5.2 -RELEASE FreeBSD FreeBSD 5.2 FreeBSD FreeBSD 5.1 -RELENG FreeBSD FreeBSD 5.1 -RELEASE/Alpha FreeBSD FreeBSD 5.1 -RELEASE-p5 FreeBSD FreeBSD 5.1 -RELEASE FreeBSD FreeBSD 5.1 FreeBSD FreeBSD 5.0 -RELENG FreeBSD FreeBSD 5.0 -RELEASE-p14 FreeBSD FreeBSD 5.0 alpha FreeBSD FreeBSD 5.0 FreeBSD FreeBSD 4.11 -STABLE FreeBSD FreeBSD 4.11 -RELENG FreeBSD FreeBSD 4.11 -RELEASE-p3 FreeBSD FreeBSD 4.10 -RELENG FreeBSD FreeBSD 4.10 -RELEASE-p8 FreeBSD FreeBSD 4.10 -RELEASE FreeBSD FreeBSD 4.10 FreeBSD FreeBSD 4.9 -RELENG FreeBSD FreeBSD 4.9 -PRERELEASE FreeBSD FreeBSD 4.9 FreeBSD FreeBSD 4.8 -RELENG FreeBSD FreeBSD 4.8 -RELEASE-p7 FreeBSD FreeBSD 4.8 -PRERELEASE FreeBSD FreeBSD 4.8 FreeBSD FreeBSD 4.7 -STABLE FreeBSD FreeBSD 4.7 -RELENG FreeBSD FreeBSD 4.7 -RELEASE-p17 FreeBSD FreeBSD 4.7 -RELEASE FreeBSD FreeBSD 4.7 FreeBSD FreeBSD 4.6.2 FreeBSD FreeBSD 4.6 -STABLE FreeBSD FreeBSD 4.6 -RELENG FreeBSD FreeBSD 4.6 -RELEASE-p20 FreeBSD FreeBSD 4.6 -RELEASE FreeBSD FreeBSD 4.6 FreeBSD FreeBSD 4.5 -STABLEpre2002-03-07 FreeBSD FreeBSD 4.5 -STABLE FreeBSD FreeBSD 4.5 -RELENG FreeBSD FreeBSD 4.5 -RELEASE-p32 FreeBSD FreeBSD 4.5 -RELEASE FreeBSD FreeBSD 4.5 FreeBSD FreeBSD 4.4 -STABLE FreeBSD FreeBSD 4.4 -RELENG FreeBSD FreeBSD 4.4 -RELENG FreeBSD FreeBSD 4.4 -RELEASE-p42 FreeBSD FreeBSD 4.4 FreeBSD FreeBSD 4.3 -STABLE FreeBSD FreeBSD 4.3 -RELENG FreeBSD FreeBSD 4.3 -RELEASE-p38 FreeBSD FreeBSD 4.3 -RELEASE FreeBSD FreeBSD 4.3 FreeBSD FreeBSD 4.2 -STABLEpre122300 FreeBSD FreeBSD 4.2 -STABLEpre050201 FreeBSD FreeBSD 4.2 -STABLE FreeBSD FreeBSD 4.2 -RELEASE FreeBSD FreeBSD 4.2 FreeBSD FreeBSD 4.1.1 -STABLE FreeBSD FreeBSD 4.1.1 -RELEASE FreeBSD FreeBSD 4.1.1 FreeBSD FreeBSD 4.1 FreeBSD FreeBSD 4.0 .x FreeBSD FreeBSD 4.0 -RELENG FreeBSD FreeBSD 4.0 alpha FreeBSD FreeBSD 4.0

Not Vulnerable:	FreeBSD FreeBSD 5.4 -RELEASE

Discussion

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

FreeBSD is prone to multiple local kernel memory disclosure vulnerabilities. These issues are due to a failure of the kernel to properly clear previously used memory buffers prior to copying these buffers to user-space.

These vulnerabilities allow local attackers to gain access to potentially sensitive kernel memory. Access to this data may aid the malicious users in further attacks.

Versions of FreeBSD prior to 5.4-RELEASE are reported vulnerable to this issue.

Exploit / POC

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

An exploit is not required.

Solution / Fix

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

Solution:
FreeBSD has released advisory FreeBSD-SA-05:08.kmem to address these issues. Please see the referenced advisory for further information.

FreeBSD FreeBSD 4.0