Serv-U FTP Server < 15.3 Improper Input Validation

medium Nessus Plugin ID 156886

Synopsis

The remote FTP server is affected by an Improper Input Validation vulnerability.

Description

According to its banner, the installed version of Serv-U is a version prior to 15.3. It is, therefore, affected by an improper input validation vulnerability. The Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized.

SolarWinds has updated the input mechanism to perform additional validation and sanitization.

Please Note: No downstream effect has been detected as the LDAP servers ignored improper characters.

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 ServU-FTP 15.3 or later.

See Also

http://www.nessus.org/u?e920478f

Plugin Details

Severity: Medium

ID: 156886

File Name: servu_15_3.nasl

Version: 1.7

Type: remote

Family: FTP

Published: 1/20/2022

Updated: 1/5/2023

Configuration: Enable thorough checks

Risk Information

VPR

Risk Factor: Low

Score: 2.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

Temporal Vector: E:H/RL:OF/RC:C

CVSS Score Source: CVE-2021-35247

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 5.1

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:solarwinds:serv-u_file_server, cpe:/a:solarwinds:serv-u

Required KB Items: installed_sw/Serv-U

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/18/2022

Vulnerability Publication Date: 1/10/2022

CISA Known Exploited Dates: 2/4/2022

Reference Information

CVE: CVE-2021-35247

IAVA: 2022-A-0047-S