CVE-2017-20084 | JUNG Smart Visu Server KNX Group Address backdoor

Exp

A vulnerability has been found in JUNG Smart Visu Server 1.0.804/1.0.830/1.0.832 and classified as critical. Affected by this vulnerability is an unknown functionality of the component KNX Group Address. The manipulation leads to backdoor. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. Upgrading to version 1.0.900 is able to address this issue. It is recommended to upgrade the affected component.

Published: 2022-06-22 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-20084 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.35%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-20084

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-20084

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-19 0.34% 0.35% +0.01%
2 2026-06-15 0.07% 0.34% +0.27%
3 2025-06-23 — 0.07% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-20084

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.8 3.4 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2017-20084

Affected software / configurations for CVE-2017-20084

Vendor Product Version Raw CPE
jung-group smart_visu_server_firmware 1.0.804 cpe:2.3:o:jung-group:smart_visu_server_firmware:1.0.804:*:*:*:*:*:*:*
jung-group smart_visu_server_firmware 1.0.830 cpe:2.3:o:jung-group:smart_visu_server_firmware:1.0.830:*:*:*:*:*:*:*
jung-group smart_visu_server_firmware 1.0.832 cpe:2.3:o:jung-group:smart_visu_server_firmware:1.0.832:*:*:*:*:*:*:*

References for CVE-2017-20084

URL Tags
http://seclists.org/fulldisclosure/2017/Feb/18 Exploit Mailing List Third Party Advisory
https://vuldb.com/?id.96817 Third Party Advisory VDB Entry
cvelogic Threat Intelligence