VDB-249260 · CVE-2023-4467 · MZ-23-01

Poly Trio 8800 7.2.6.0019 Test Automation Mode backdoor

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Poly Trio 8800 7.2.6.0019 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Test Automation Mode. Such manipulation leads to backdoor. This vulnerability is referenced as CVE-2023-4467. The attack can be executed directly on the physical device. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Poly Trio 8800 7.2.6.0019 and classified as critical. Affected by this issue is an unknown code of the component Test Automation Mode. The manipulation with an unknown input leads to a backdoor vulnerability. Using CWE to declare the problem leads to CWE-912. The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators. Impacted is confidentiality, integrity, and availability.

The weakness was published 12/29/2023 by Christoph Wolff and Pascal Zenker with modzero AG as MZ-23-01. The advisory is shared for download at modzero.com. This vulnerability is handled as CVE-2023-4467. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1588.001. The advisory points out:

If the hidden functionality called “Test Automation”-mode is enabled, Poly devices start an ADB3 and Telnet daemon on boot. These allow unauthenticated access with root privileges. The functionality can be activated by an attacker with physical access and the administrator password or with shell access.

The exploit is available at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

fahrplan.events.ccc.de is providing further details. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Poly

Name

Trio 8800

Version

7.2.6.0019

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

Researcher Base Score: 6.2
Researcher Vector: 🔍

NVD Base Score: 6.6
NVD Vector: 🔍

CNA Base Score: 6.2
CNA Vector (VulDB): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Backdoor
CWE: CWE-912
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/21/2023 🔍
12/29/2023 +130 days 🔍
12/29/2023 +0 days 🔍
01/21/2024 +23 days 🔍

Sourcesinfo

Advisory: MZ-23-01
Researcher: Christoph Wolff, Pascal Zenker
Organization: modzero AG
Status: Confirmed

CVE: CVE-2023-4467 (🔍)
GCVE (CVE): GCVE-0-2023-4467
GCVE (VulDB): GCVE-100-249260
Misc.: 🔍

Entryinfo

Created: 12/29/2023 10:28
Updated: 01/21/2024 08:06
Changes: 12/29/2023 10:28 (41), 12/29/2023 10:36 (14), 12/29/2023 10:40 (1), 01/09/2024 17:12 (2), 01/21/2024 08:01 (2), 01/21/2024 08:06 (28)
Complete: 🔍
Cache ID: 216::103