freeFTPd / freeSSHd SFTP Authentication Bypass
high Nessus Plugin ID 63223
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Synopsis
The SFTP server running on the remote host has an authentication bypass vulnerability.Description
The SFTP server included with freeFTPd or freeSSHd has an authentication bypass vulnerability. Authentication can be bypassed by opening an SSH channel before any credentials are provided. A remote, unauthenticated attacker could exploit this to login without providing credentials.After logging in, uploading specially crafted files could result in arbitrary code execution as SYSTEM. Refer to the researcher's advisory for more information.
Solution
There is no known solution at this time.See Also
https://seclists.org/fulldisclosure/2010/Aug/132
Plugin Details
Severity: High
ID: 63223
File Name: freeftpd_sftp_auth_bypass.nasl
Version: 1.17
Type: remote
Family: Gain a shell remotely
Published: 12/11/2012
Updated: 6/12/2020
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 9.5
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal Vector: E:F/RL:U/RC:C
CVSS Score Source: CVE-2012-6067
CVSS v3
Risk Factor: High
Base Score: 7.3
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Temporal Vector: E:F/RL:U/RC:C
Vulnerability Information
CPE: cpe:/a:freeftpd:freeftpd, cpe:/a:freesshd:freesshd
Excluded KB Items: global_settings/supplied_logins_only
Exploit Available: true
Exploit Ease: Exploits are available
Exploited by Nessus: true
Vulnerability Publication Date: 8/11/2010
Exploitable With
Core Impact
Metasploit (Freesshd Authentication Bypass)
Reference Information
CVE: CVE-2012-6066, CVE-2012-6067