FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

BID:16373

Info

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

Bugtraq ID: 16373
Class: Design Error
CVE: CVE-2006-0379
CVE-2006-0380
Remote: No
Local: Yes
Published: Jan 25 2006 12:00AM
Updated: Feb 07 2006 08:53PM
Credit: Xin LI and Karl Janmar discovered these issues.
Vulnerable: FreeBSD FreeBSD 6.0 -STABLE
FreeBSD FreeBSD 6.0 -RELEASE
FreeBSD FreeBSD 5.4 -RELENG
FreeBSD FreeBSD 5.4 -RELEASE
FreeBSD FreeBSD 5.4 -PRERELEASE
FreeBSD FreeBSD 5.4-STABLE
Not Vulnerable:

Discussion

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

FreeBSD is prone to multiple local kernel memory-disclosure vulnerabilities. One issue is due to the kernel's failure to properly clear previously used memory buffers before copying them to userspace. The other issue is due to a flaw that potentially results in too much data being copied to user memory.

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

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-06:06.kmem to address these issues. Please see the referenced advisory for further information.


FreeBSD FreeBSD 5.4-STABLE

FreeBSD FreeBSD 6.0 -RELEASE

FreeBSD FreeBSD 6.0 -STABLE

References

FreeBSD Multiple Local Kernel Memory Disclosure Vulnerabilities

References:

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