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[email protected]CVE-2020-5763

HistoryJul 29, 2020 - 7:15 p.m.

CVE-2020-5763

2020-07-2919:15:00

CWE-326

[email protected]

web.nvd.nist.gov

ssh

backdoor

grandstream

ht800

firmware

vulnerability

cve-2020-5763

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7 High

AI Score

Confidence

Low

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.005 Low

EPSS

Percentile

76.2%

JSON

Grandstream HT800 series firmware version 1.0.17.5 and below contain a backdoor in the SSH service. An authenticated remote attacker can obtain a root shell by correctly answering a challenge prompt.

CPENameOperatorVersion
grandstream:ht801_firmwaregrandstream ht801 firmwarele1.0.17.5
grandstream:ht802_firmwaregrandstream ht802 firmwarele1.0.17.5
grandstream:ht812_firmwaregrandstream ht812 firmwarele1.0.17.5
grandstream:ht814_firmwaregrandstream ht814 firmwarele1.0.17.5
grandstream:ht818_firmwaregrandstream ht818 firmwarele1.0.17.5
grandstream:ht813_firmwaregrandstream ht813 firmwarele1.0.17.5

CPE	Name	Operator	Version
grandstream:ht801_firmware	grandstream ht801 firmware	le	1.0.17.5
grandstream:ht802_firmware	grandstream ht802 firmware	le	1.0.17.5
grandstream:ht812_firmware	grandstream ht812 firmware	le	1.0.17.5
grandstream:ht814_firmware	grandstream ht814 firmware	le	1.0.17.5
grandstream:ht818_firmware	grandstream ht818 firmware	le	1.0.17.5
grandstream:ht813_firmware	grandstream ht813 firmware	le	1.0.17.5

References

www.tenable.com/security/research/tra-2020-43

www.tenable.com/security/research/tra-2020-47

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7 High

AI Score

Confidence

Low

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.005 Low

EPSS

Percentile

76.2%

JSON

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