OpenSSH < 5.7 Multiple Vulnerabilities

high Nessus Plugin ID 44081

Synopsis

The remote SSH service may be affected by multiple vulnerabilities.

Description

According to its banner, the version of OpenSSH running on the remote host is earlier than 5.7. Versions before 5.7 may be affected by the following vulnerabilities :

- A security bypass vulnerability because OpenSSH does not properly validate the public parameters in the J-PAKE protocol. This could allow an attacker to authenticate without the shared secret. Note that this issue is only exploitable when OpenSSH is built with J-PAKE support, which is currently experimental and disabled by default, and that Nessus has not checked whether J-PAKE support is indeed enabled. (CVE-2010-4478)

- The auth_parse_options function in auth-options.c in sshd provides debug messages containing authorized_keys command options, which allows remote, authenticated users to obtain potentially sensitive information by reading these messages. (CVE-2012-0814)

Solution

Upgrade to OpenSSH 5.7 or later.

See Also

http://seb.dbzteam.org/crypto/jpake-session-key-retrieval.pdf

http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/Attic/jpake.c#rev1.5

http://www.nessus.org/u?2ac4f8d9

Plugin Details

Severity: High

ID: 44081

File Name: openssh_57.nasl

Version: 1.14

Type: remote

Family: Misc.

Published: 10/4/2011

Updated: 3/27/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2010-4478

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Required KB Items: installed_sw/OpenSSH

Exploit Ease: No known exploits are available

Patch Publication Date: 9/20/2010

Vulnerability Publication Date: 9/12/2010

Reference Information

CVE: CVE-2010-4478, CVE-2012-0814

BID: 45304, 51702