9.8
CRITICAL
CVE-2020-3924
TAT-76/77 TONNET Patch Injection Vulnerability
Description

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.

INFO

Published Date :

Feb. 27, 2020, 4:15 a.m.

Last Modified :

July 21, 2021, 11:39 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-3924 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Tonnet tat-77104g1_firmware
2 Tonnet tat-70432n_firmware
3 Tonnet tat-71416g1_firmware
4 Tonnet tat-71832g1_firmware
5 Tonnet tat-76104g3_firmware
6 Tonnet tat-76108g3_firmware
7 Tonnet tat-76116g3_firmware
8 Tonnet tat-76132g3_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-3924.

URL Resource
https://tvn.twcert.org.tw/taiwanvn/TVN-201910004 Third Party Advisory
https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-3924 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-3924 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Jul. 21, 2021

    Action Type Old Value New Value
    Changed CWE CWE-74 CWE-77
  • Initial Analysis by [email protected]

    Mar. 03, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://tvn.twcert.org.tw/taiwanvn/TVN-201910004 No Types Assigned https://tvn.twcert.org.tw/taiwanvn/TVN-201910004 Third Party Advisory
    Changed Reference Type https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf No Types Assigned https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf Third Party Advisory
    Added CWE NIST CWE-74
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-77104g1_firmware:*:*:*:*:*:*:*:* versions up to (including) tat-77104g1_20190107 OR cpe:2.3:h:tonnet:tat-77104g1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-70432n_firmware:*:*:*:*:*:*:*:* versions up to (including) tat-77208g1_20181225 OR cpe:2.3:h:tonnet:tat-70432n:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-71416g1_firmware:*:*:*:*:*:*:*:* versions up to (including) tat-71416g1_20181225 OR cpe:2.3:h:tonnet:tat-71416g1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-71832g1_firmware:*:*:*:*:*:*:*:* versions up to (including) tat-71832g1_20190510 OR cpe:2.3:h:tonnet:tat-71832g1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-76104g3_firmware:*:*:*:*:*:*:*:* versions up to (including) 20181220_76104g3 OR cpe:2.3:h:tonnet:tat-76104g3:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-76108g3_firmware:*:*:*:*:*:*:*:* versions up to (including) 20181221_76208g3 OR cpe:2.3:h:tonnet:tat-76108g3:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-76116g3_firmware:*:*:*:*:*:*:*:* versions up to (including) 20181221_76216g3 OR cpe:2.3:h:tonnet:tat-76116g3:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:tonnet:tat-76132g3_firmware:*:*:*:*:*:*:*:* versions up to (including) tat-70832g3_20181221-1 OR cpe:2.3:h:tonnet:tat-76132g3:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 27, 2020

    Action Type Old Value New Value
    Removed CVSS V3.1 [email protected] AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
    Added CVSS V3.1 TWCERT/CC AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-3924 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.24 }} 0.00%

score

0.59817

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability