FreeBSD : FreeBSD -- TCP reassembly vulnerability (6d472244-6007-11e6-a6c3-14dae9d210b8)

This script is Copyright (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

FreeBSD may add a reassemble queue entry on the stack into the segment
list when the reassembly queue reaches its limit. The memory from the
stack is undefined after the function returns. Subsequent iterations
of the reassembly function will attempt to access this entry. Impact :
An attacker who can send a series of specifically crafted packets with
a connection could cause a denial of service situation by causing the
kernel to crash.

Additionally, because the undefined on stack memory may be overwritten
by other kernel threads, while extremely difficult, it may be possible
for an attacker to construct a carefully crafted attack to obtain
portion of kernel memory via a connected socket. This may result in
the disclosure of sensitive information such as login credentials,
etc. before or even without crashing the system.

See also :

http://www.nessus.org/u?5dbbce9a

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:C)
CVSS Temporal Score : 5.8
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 92900 ()

Bugtraq ID: 67153

CVE ID: CVE-2014-3000

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