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TITLE:
FreeBSD "/dev/crypto" Local Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA22543

VERIFY ADVISORY:
http://secunia.com/advisories/22543/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

OPERATING SYSTEM:
FreeBSD 6.x
http://secunia.com/product/6778/

DESCRIPTION:
Evgeny Legerov has reported a vulnerability in FreeBSD, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error within the implementation
of "/dev/crypto" and can be exploited by sending certain IOCTLs to
"/dev/crypto".

The vulnerability is reported in version 6.1. Other versions may also
be affected.

SOLUTION:
Grant only trusted users access to the system.

PROVIDED AND/OR DISCOVERED BY:
Evgeny Legerov

ORIGINAL ADVISORY:
http://elegerov.blogspot.com/2006/10/here-is-lame-proof-of-concept-code-for.html

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