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OpenSSH 6.8p1 - 7.x < 7.1p2 ssh_packet_read_poll2() Packet Handling DoS

medium Nessus Plugin ID 90924

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Synopsis

The SSH server running on the remote host is affected by a denial of service vulnerability.

Description

According to its banner, the version of OpenSSH running on the remote host is 6.x equal to or greater than 6.8p1 or 7.x prior to 7.1p2. It is, therefore, affected by a denial of service vulnerability due to an out-of-bounds read error that occurs when handling packets. A remote attacker can exploit this to crash the service or disclose memory contents.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to OpenSSH version 7.1p2 / 7.2 or later.

See Also

http://www.openssh.com/txt/release-7.1p2

Plugin Details

Severity: Medium

ID: 90924

File Name: openssh_71p2.nasl

Version: 1.6

Type: remote

Family: Misc.

Published: 5/5/2016

Updated: 3/27/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2016-1907

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Required KB Items: installed_sw/OpenSSH

Exploit Ease: No known exploits are available

Patch Publication Date: 1/14/2016

Vulnerability Publication Date: 1/14/2016

Reference Information

CVE: CVE-2016-1907

BID: 81293