8.8
HIGH
CVE-2020-5763
Grandstream HT800 series SSH Backdoor
Description

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.

INFO

Published Date :

July 29, 2020, 7:15 p.m.

Last Modified :

July 31, 2020, 6:14 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2020-5763 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 Grandstream ht802_firmware
2 Grandstream ht801_firmware
3 Grandstream ht812_firmware
4 Grandstream ht814_firmware
5 Grandstream ht818_firmware
6 Grandstream ht813_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-2020-5763.

URL Resource
https://www.tenable.com/security/research/tra-2020-43 Exploit Third Party Advisory
https://www.tenable.com/security/research/tra-2020-47 Third Party Advisory VDB Entry

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-2020-5763 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-5763 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
  • Initial Analysis by [email protected]

    Jul. 31, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://www.tenable.com/security/research/tra-2020-43 No Types Assigned https://www.tenable.com/security/research/tra-2020-43 Exploit, Third Party Advisory
    Changed Reference Type https://www.tenable.com/security/research/tra-2020-47 No Types Assigned https://www.tenable.com/security/research/tra-2020-47 Third Party Advisory, VDB Entry
    Added CWE NIST CWE-326
    Added CPE Configuration AND OR *cpe:2.3:o:grandstream:ht801_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.0.17.5 OR cpe:2.3:h:grandstream:ht801:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:grandstream:ht802_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.0.17.5 OR cpe:2.3:h:grandstream:ht802:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:grandstream:ht812_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.0.17.5 OR cpe:2.3:h:grandstream:ht812:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:grandstream:ht814_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.0.17.5 OR cpe:2.3:h:grandstream:ht814:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:grandstream:ht818_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.0.17.5 OR cpe:2.3:h:grandstream:ht818:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:grandstream:ht813_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.0.17.5 OR cpe:2.3:h:grandstream:ht813:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 29, 2020

    Action Type Old Value New Value
    Added Reference https://www.tenable.com/security/research/tra-2020-47 [No Types Assigned]
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-2020-5763 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

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

0.50 }} -0.02%

score

0.76167

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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