TONNET TAT-76/TAT-77 Patch File command injection

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in TONNET TAT-76 and TAT-77. It has been declared as critical. This affects an unknown part of the component Patch File Handler. The manipulation results in command injection. This vulnerability is reported as CVE-2020-3924. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in TONNET TAT-76 and TAT-77 (version now known). It has been classified as critical. Affected is some unknown processing of the component Patch File Handler. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.

The weakness was disclosed 02/27/2020. This vulnerability is traded as CVE-2020-3924 since 12/20/2019. The exploitability is told to be difficult. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

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

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.4
NVD Vector: 🔍

CNA Base Score: 6.4
CNA Vector (TWCERT/CC): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/20/2019 🔍
02/27/2020 +69 days 🔍
02/28/2020 +1 days 🔍
05/12/2025 +1900 days 🔍

Sourcesinfo

Advisory: tvn.twcert.org.tw
Status: Not defined

CVE: CVE-2020-3924 (🔍)
GCVE (CVE): GCVE-0-2020-3924
GCVE (VulDB): GCVE-100-150702
See also: 🔍

Entryinfo

Created: 02/28/2020 15:28
Updated: 05/12/2025 08:49
Changes: 02/28/2020 15:28 (35), 02/28/2020 15:33 (11), 04/07/2024 10:45 (16), 04/07/2024 10:51 (19), 05/12/2025 08:49 (3)
Complete: 🔍
Cache ID: 216::103

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