Dropbear SSH Server < 0.49.0 Hostkey Host Spoofing Vulnerability

Medium Nessus Network Monitor Plugin ID 3929

Synopsis

The remote host is vulnerable to a flaw that would allow remote attackers to spoof trusted hosts.

Description

The remote host is running Dropbear, a small, open-source SSH server. The version of Dropbear installed on the remote host is prior to 0.49.0, and by default has a flaw where the application fails to warn if the hostkey file has changed. An attacker exploiting this flaw would be able to execute a man-in-the-middle attack against the Dropbear server.

Solution

Upgrade to version 0.49.0 or higher.

See Also

http://matt.ucc.asn.au/dropbear/CHANGES

Plugin Details

Severity: Medium

ID: 3929

File Name: 3929.prm

Family: SSH

Published: 2007/03/01

Modified: 2017/03/28

Dependencies: 700029, 3059

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 4.8

Temporal Score: 4

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

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSSv3

Base Score: 5.3

Temporal Score: 4.9

Vector: CVSS3#AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS3#E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:matt_johnston:dropbear

Reference Information

CVE: CVE-2007-1099

BID: 22761