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

high Nessus Plugin ID 92900

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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.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 92900

File Name: freebsd_pkg_6d472244600711e6a6c314dae9d210b8.nasl

Version: 2.6

Type: local

Family: FreeBSD Local Security Checks

Published: 8/12/2016

Updated: 1/4/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:freebsd, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 8/11/2016

Vulnerability Publication Date: 4/30/2014

Reference Information

CVE: CVE-2014-3000

BID: 67153

FreeBSD: SA-14:08.tcp

Detections

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