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>> FreeBSD "fw_ioctl()" Integer Overflow Local Information Disclosure Vulnerability

Title : FreeBSD "fw_ioctl()" Integer Overflow Local Information Disclosure Vulnerability
VUPEN ID : VUPEN/ADV-2006-4561
CVE ID : CVE-2006-6013
CWE ID : VUPEN VNS Only
CVSS V2 : VUPEN VNS Only
Rated as : Low Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2006-11-17


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in FreeBSD, which could be exploited by local attackers to disclose sensitive information. This flaw is due to an integer overflow error in the "fw_ioctl()" [dev/firewire/fwdev.c] function that does not properly handle malformed arguments, which could be exploited by malicious users to gain unauthorized read access to the system memory.

Affected Products

FreeBSD 6.x
FreeBSD 5.x
FreeBSD 4x

Solution

Apply patch :
http://security.FreeBSD.org/patches/SA-06:25/kmem.patch

References

http://www.vupen.com/english/advisories/2006/4561
http://www.kernelhacking.com/bsdadv1.txt
http://security.freebsd.org/advisories/FreeBSD-SA-06:25.kmem.asc

Credits

Vulnerability reported by Filipe Balestra and Rodrigo Rubira Branco

ChangeLog

2006-11-17 : Initial release
2006-12-06 : Updated Solution

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