SSH with Kerberos NFS Share Ticket Disclosure

low Nessus Plugin ID 10472

Synopsis

The remote SSH server does not properly protect the kerberos tickets of the users.

Description

The remote host is running a version of SSH which is older than (or as old as) version 1.2.27.

There is a flaw in the remote version of this software which allows an attacker to eavesdrop the kerberos tickets of legitimate users of this service, as sshd will set their environment variable KRB5CCNAME to 'none' when they log in. As a result, kerberos tickets will be stored in the current working directory of the user, as 'none'.

In certain cases, this may allow an attacker to obtain the tickets.

Solution

Upgrade to the newest version of SSH.

Plugin Details

Severity: Low

ID: 10472

File Name: ssh_kerberos.nasl

Version: 1.29

Type: remote

Family: Misc.

Published: 7/16/2000

Updated: 8/3/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 1.9

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/30/2000

Reference Information

CVE: CVE-2000-0575

BID: 1426

Detections

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