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[email protected]CVE-2020-3924

HistoryFeb 27, 2020 - 4:15 a.m.

CVE-2020-3924

2020-02-2704:15:10

CWE-77

[email protected]

web.nvd.nist.gov

tat-76

tat-77

dvr

firmware

command injection

patch files

security vulnerability

cve-2020-3924

10 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.5 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

61.9%

JSON

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.

Affected configurations

NVD

Node

tonnettat-77104g1_firmwareRange≤tat-77104g1_20190107

AND

tonnettat-77104g1Match-

Node

tonnettat-70432n_firmwareRange≤tat-77208g1_20181225

AND

tonnettat-70432nMatch-

Node

tonnettat-71416g1_firmwareRange≤tat-71416g1_20181225

AND

tonnettat-71416g1Match-

Node

tonnettat-71832g1_firmwareRange≤tat-71832g1_20190510

AND

tonnettat-71832g1Match-

Node

tonnettat-76104g3_firmwareRange≤20181220_76104g3

AND

tonnettat-76104g3Match-

Node

tonnettat-76108g3_firmwareRange≤20181221_76208g3

AND

tonnettat-76108g3Match-

Node

tonnettat-76116g3_firmwareRange≤20181221_76216g3

AND

tonnettat-76116g3Match-

Node

tonnettat-76132g3_firmwareRange≤tat-70832g3_20181221-1

AND

tonnettat-76132g3Match-

CPENameOperatorVersion
tonnet:tat-77104g1_firmwaretonnet tat-77104g1 firmwareletat-77104g1_20190107

CPE	Name	Operator	Version
tonnet:tat-77104g1_firmware	tonnet tat-77104g1 firmware	le	tat-77104g1_20190107

CNA Affected

[
  {
    "platforms": [
      "TAT-76 series"
    ],
    "product": "DVR",
    "vendor": "TONNET",
    "versions": [
      {
        "lessThanOrEqual": "20191216",
        "status": "affected",
        "version": "0",
        "versionType": "custom"
      }
    ]
  },
  {
    "platforms": [
      "TAT-77 series"
    ],
    "product": "DVR",
    "vendor": "TONNET",
    "versions": [
      {
        "lessThanOrEqual": "20200213",
        "status": "affected",
        "version": "0",
        "versionType": "custom"
      }
    ]
  }
]

References

tvn.twcert.org.tw/taiwanvn/TVN-201910004

www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf

10 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.5 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

61.9%

JSON

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